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Bonneville Salt Flats Discussion => Build Diaries => Topic started by: Mobacken Racing on March 24, 2013, 03:19:01 PM



Title: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 24, 2013, 03:19:01 PM
Hi!

With the bike finally standing on its wheels I felt like it was a good time to start a thread here and introduce myself. Anders Johansson is my name, 31 years old and live in the northern parts of Sweden. I work as a mechanic at a combined power and heating plant and have been building all sorts of jet engines for the last 12 years.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01825.jpg)

For three years I have been building a gas turbine powered land speed bike from scratch, the engine is based around a Garrett TV94 core and everything else is either home cast or milled from blocks of aluminum on my manual lathe and mill.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01798.jpg)

The engine before the first test run.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01503-1.jpg)

The hot parts are made from SS304, SS316 and mild steel coated with cheramics. The engine once in its turboshaft configuration is calculated to deliver around 150hp on the rear tyre, even more if I dare to run it hot enough.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-sndagliten3.jpg)

I spent a year testing and improving the engine and after the fourth rebuild it seems to work like it should, earlier I had problems with oil leakage and tight tolerances but during the last run I ran it for a minute at 100% without any problems other than a high oil temp which I will solve with a larger capacity and an oil cooler.

The first test, dressed for the occation and bloody nervous.  :-D

http://youtu.be/3Gd_H8ClmHw

The fifth test, lots of thrust since it almost tipped the test bench over.

http://youtu.be/gLYInPTrdaU

With the gas producer sorted out I started to build the chromemoly frame, a frame jig was built and a set of GSXR 750 wheels and forks was sourced.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01812.jpg)

At the same time I designed and built the power turbine section, it is based around an RR Allison C20 4th stage turbine wheel with a home built NGV section in SS304.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01831.jpg)

The C20 turbine wheel in its housing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01841.jpg)

Making the NGV.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01858.jpg)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01877.jpg)

A mock up of the engine with an 5:1 angle drive gearbox in the bike frame.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01901.jpg)

Rebuilding the gearbox to fit the freepower section.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01929.jpg)

Fitting the parts together.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01962.jpg)

With the engine finally in one piece I built the frame around it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01999.jpg)

With the frame taken out of the jig I could take it outside for a photo session.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Provsittning11liten.jpg)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Provsittning6liten.jpg)

Intake air box and underhang oil and fuel tanks built.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011047.jpg)

Fitting the pumps and regulators to the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011056.jpg)

This is what the bike looks like now, I hope to have it ready for its first race in a year from now at the swedish Speed Weekend on Ice.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011058.jpg)

The goal is to take it to Bonneville some day and try for the record in the APS Omega class, the electric guys are bloody fast but I know I can do it!  :-)

Cheers!
/Anders


Title: Re: APS Ω Gas turbine bike build
Post by: Elmo Rodge on March 24, 2013, 04:09:33 PM
I like the way the Salt is sticking to the tires in the "outside" photos.  :wink: Really though, that is an impressive looking build. Wayno


Title: Re: APS Ω Gas turbine bike build
Post by: lsrjunkie on March 24, 2013, 04:13:50 PM
Absolutely unbelievable! I thought I knew a few things, but wow!! Excellent project! Welcome to the forum Anders. Can't wait to see this thing progress. I'll be watching this build!  :cheers:


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 24, 2013, 04:29:30 PM
Thank you very much, since I am new to land speed racing on wheels (some friends and I have been fooling around with jet powered kick sleds at the swedish ice event for a couple of years) I would appreciate every constructive comment about aerodynamics and things to think about while building a bike frame.

I wouldnīt want to do a "Munroe" and travel all the way to the salt flats only to be turned down by the safety crew for some reason I didnīt even know about... :|



Title: Re: APS Ω Gas turbine bike build
Post by: Peter Jack on March 24, 2013, 04:32:05 PM
Fascinating build Anders with some great looking craftsmanship. Keep up the great work and I look forward to seeing the finished product.  :cheers: :cheers: :cheers:

Pete


Title: Re: APS Ω Gas turbine bike build
Post by: maj on March 24, 2013, 04:32:51 PM
All i can say is WOW
handcrafting turbine parts  :cheers:

what rpm does it run at and how well will the 5:1 cope

from my experiance on salt i would say be carefull of putting too much weight too low
look at the weight positioning of a std motorcycle in relation to axle line
i have turned a great handling bike to a poor handling bike with the addition of some weight down low


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 24, 2013, 04:55:25 PM
Thanks guys! :-)

The gas producer max is 66.000rpm and the freepower turbine slightly above 30.000, so with a 5:1 reduction I will have 6.000rpm at the front chain drive sprocket which will be fitted to the gearbox output shaft.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011015.jpg)

The input shaft will get cheramic bearings to cope with the revs, I will also convert the gearbox to dry sump with oil jets pointing at the gear mesh and bearings to force oil in where it is needed. It should survive. :-)

Interesting info about the weight distribution, I imagined that the lower the CoG was the better the bike handled while driving in a straight line. Fortunately the battery and gearbox are the heaviest parts and they are placed relatively centred in the bike.

If anyone is interested in more pics and info about the build you can check out my build thread at the Jet and Turbine Owners forum, the thread is 81 pages long and counting so you are up for a long night. :-D

(http://mobackenracing.se/wp-content/upload/JU-01-25.jpg)

http://www.jetandturbineowners.proboards.com/index.cgi?board=diygeneral&action=display&thread=53 (http://www.jetandturbineowners.proboards.com/index.cgi?board=diygeneral&action=display&thread=53)


Title: Re: APS Ω Gas turbine bike build
Post by: donpearsall on March 24, 2013, 10:34:20 PM
You are doing an excellent job Anders! I am in awe that you could hand-build a tubine engine. Good luck to you. It has always been my ambition to build a turbine bike - but I just need to win the lottery. There is no way I could actually build an engine like you are doing. You deserve a trophy just for showing up with a running bike!

I hope you do make it to Bonneville. Keep on posting and keep us updated.

Don



Title: Re: APS Ω Gas turbine bike build
Post by: Frank06 on March 25, 2013, 08:15:44 AM
Very interesting Anders.  What is the fuel?  Also (so I don't have to read the entire thread on the other forum!) what is the purpose of the air bottle?  Will a clutch be needed or will friction brakes keep the turbine section from spooling up too quickly?

thanks,
Frank


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 25, 2013, 09:10:00 AM
Thanks!  :-)

I will run the engine on kerosine but diesel works as well. Even bio-diesel should work if I want to impress some enviroment-friendly people. It runs best on kero so I will use Jet-A1 for now.

The air bottle is for starting, I use a 200bar scuba bottle for impingment starting with an air nozzle pointing at the turbine wheel. I tried to use a 1kW brushless motor but the axial bearing has so much drag that it couldnīt get up to starting revs.

No clutch or friction brakes, everything from the power turbine wheel to the rear wheel is directly coupled. The turboshaft engine can run with the output shaft locked since the power turbine is thrust driven and not mechanically coupled to the main rotor.


Title: Re: APS Ω Gas turbine bike build
Post by: fordboy628 on March 25, 2013, 10:41:10 AM
WOW!!!!!!!!!!!!!!!!!!!!!!!!!!              On everything!!!!!!!!!!!!!!!!    Fabricating, machining, welding, engineering, WOW!!!!!!!!!!!!!

 :cheers:
Fordboy



Title: Re: APS Ω Gas turbine bike build
Post by: Dynoroom on March 25, 2013, 11:36:14 AM
Superb Build! Love that you converted a turbocharger into a turbine engine (you did right?). Looking forward to seeing it.

One other word........ (Containment)

With a project of this nature you should consider some type of failure containment as the cast iron turbine housing does in the standard turbo.


Title: Re: APS Ω Gas turbine bike build
Post by: sabat on March 25, 2013, 01:20:22 PM
I am humbled by your fantastic fabrication and technical skills, best of luck on the ice, and I hope to see you on the salt someday. -Dean


Title: Re: APS Ω Gas turbine bike build
Post by: bbarn on March 25, 2013, 03:02:06 PM
(http://www.sherv.net/cm/emoticons/shocked/jaw-drop-smiley-emoticon.gif)  WOW! I would like to hang out with you at your shop...looks like piles of fun!!!

Keep posting your progress, I know I am not alone in saying this is the kind of stuff most people in this forum dig. Great looking build, it will be fun to watch this happen.


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 25, 2013, 06:17:37 PM
Thanks a lot guys for your praise, I didnīt at all expect this kind of response when I decided to post the build here. More like "are you seriously going to drag THAT thing over here?!?" :-D

Regarding containment, the first thing that will burst in case of a severe overspeed event is the compressor wheel and it is surrounded by aprox. 50mm of more or less solid aluminum. The turbine wheel has a ring of stainless stator vanes around it with two thick steel discs holding them together so I think I am on the safe side.

I use a PWM controller to throttle the fuel pump and as an extra safety I will add a fuel pressure regulator set at the full throttle flow so it should be impossible to give the engine enough fuel to over-rev.

Cheers!
/Anders


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 25, 2013, 06:20:55 PM
This evening I spent in the workshop fitting the front fender to the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011061.jpg)

Last night I wrote down everything I have to do on the bike before I can take it apart to weld up the frame, the list became quite long and the first thing on it was to fit the front fender and fairings. Without them firmly fitted I cannot finish the air intake, fit any hoses or much else for that matter.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011062.jpg)

I made some aluminum brackets for the fender and hung it in place, the reason for the sad look is because the fender was made to fit all kinds of fork angles so there is plenty of material to be removed.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011063.jpg)

This looks better, as you probably know one of the rules in the class APS/Ω is that the front fender cannot hide more than 180° of the circumference of the wheel and that the front of the fender cannot in any spot be lower than the front wheel axle.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011064.jpg)

Here is the bike with the fender cut, personally I think the bike looks much better without a fender at all but then I wonīt even make it out of the pits before the engine is filled with salt... :roll:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011065.jpg)

The last thing I did tonight was to modify the fairings so they would fit the rear of the fender, they will be properly strenghtened with aluminum brackets later to withstand the force from the air. Everyone who has lifted their head on a motorcycle in 300km/h know what I am talking about... :)

Cheers!
/Anders


Title: Re: APS Ω Gas turbine bike build
Post by: charlie101 on March 25, 2013, 10:01:07 PM
Amazing build! Subscribed. Svenskt stål biter! :cheers:
How much do you estimate the engine and gearbox weigh? and what is the front/rear weight balance of the bike?


Title: Re: APS Ω Gas turbine bike build
Post by: wobblywalrus on March 25, 2013, 10:26:51 PM
Anders, a good way to come over here is the way Lars from Denmark did it.  He ran at Speedweek, then he fine tuned his bike and he ran again at BUB a few weeks later.  He had two chances to get everything right.   


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 25, 2013, 11:46:47 PM
Thanks! The gearbox is quite heavy since it is made from cast iron, I havenīt actually weighed the complete engine yet but if I should guess I would say around 80 kg for the gas producer, power turbine section and gearbox. An alloy gearbox housing and thinner hot sections in the gas turbine should easily lower this 15-20 kg but I see no reason.

The same goes for the weight distribution, the CoG seems to be somewhere below the drivers seat but I will measure it properly when the bike is finished. Since everything is a very tight fit I have no way of moving things around to get a better weight distribution unless I add lead weights to the frame.

That is a very good idea to run both Speed Week and BuB, the trip overseas will be very taxing on my workshop savings so I might as well run as much as I can when I am there. When I started the build I sort of promised my feancee that she could come along when the time comes to go to Bonneville and she would probably enjoy some days off the salt. :-)

When the bike is running I will spend a couple of years testing the tracks here in europe to sort the bike out before I take my shot at the record, if I find that there is no way on earth I can break the 349km/h standing class record I will probably build a new bike before I come.

I am discussing a 370hp gas turbine build with a good friend in Australia so if my JU-01 engine (Johansson Unit 01) fails me there is still hope. :-)

Cheers!
/Anders


Title: Re: APS Ω Gas turbine bike build
Post by: Jon on March 26, 2013, 04:56:31 AM
Amazing skill is all I can say, thanks for sharing.

Be watching this.
jon


Title: Re: APS Ω Gas turbine bike build
Post by: gkabbt on March 26, 2013, 05:59:11 AM
Anders,

I am going to let a modified quote from Milwaukee Midget sum it up for me:

THIS is what hot-rodding was meant to be.

What YOU'RE doing is taking the ART of hot-rodding and pushing the boundary to a level that few of us will ever have the talent to do.

This is just stunning.

Thanks for letting us come along for the ride.

Chris


Gregg


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 26, 2013, 03:32:48 PM
Once again, thank you so much for your praise. I am not sure if I deserve it just yet though, when the bike has passed 200mph I probably feel like I have earned the bragging rights but until then Iīll try to keep a low profile.  :-)

A pair of 4" sight glasses ordered for the fuel and oil tanks on Ebay today, and during a running pass before dinner I figured out how to make the front fairing mounts. Baby stepping my way forward.

Cheers!
/Anders


Title: Re: APS Ω Gas turbine bike build
Post by: TwinSpin on March 26, 2013, 05:59:02 PM
I'm not very interested in turbine bikes, I'm an old school piston guy. HOWEVER, because of your design, machining art and craftsmanship, I am VERY interested in your build. You have my attention and encouragement and I will follow this build.

Enjoy making your dreams in 3D. I believe part of the fun of any speed record is the build itself. Best wishes.

Bill


Title: Re: APS Ω Gas turbine bike build
Post by: tauruck on March 26, 2013, 11:11:14 PM
Hey Anders, this is a great build, the engineering and everything else looks excellent. Well done and I hope you achieve your goal. Mike.


Title: Re: APS Ω Gas turbine bike build
Post by: MTABike on March 26, 2013, 11:11:26 PM
This is AWESOME and very inspirational!!  Thank you very much for sharing.


Title: Re: APS Ω Gas turbine bike build
Post by: grumm441 on March 27, 2013, 05:05:12 AM
Really nice work Anders
G


Title: Re: APS Ω Gas turbine bike build
Post by: Seldom Seen Slim on March 27, 2013, 12:09:03 PM
Anders, I'm not sure if it's been mentioned - or if you already know it.  Weight is usually your friend in land speed racing.  Yes, you need to be concerned about balance front to rear, and yes, if you're running a STANDING measured distance the lighter weight is good.  But for flying kilo/mile speeds, weight gives you more traction without an aero penalty.  It appears you'll have plenty of power - but if you can't get that power down to the salt you'll end up with a bunch of tire spin at high speed.  It's doable -- but kind of scary the first time or two when you spin up the rear wheel at 180 mph :-o :-o


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 27, 2013, 12:49:34 PM
Thanks guys! :-)

Spinning a tyre at high speeds should be a bit exciting indeed, the good thing about saving weight at this point in the build process is that it is easier to add lead weights later to balance the front/rear of the bike.

What about the chrome moly frame, do I need to have a certified chassi builder to visually check the welds before I paint the frame or is it ok if I take some random pics of the welds and send to the landspeed tech inspector? 


Title: Re: APS Ω Gas turbine bike build
Post by: DND on March 27, 2013, 03:45:29 PM
Hi Anders

The good thing you could do is contact a Certified Welder in your town, pay for a hour of his time and have him bring his welding helmet.

Have some tubing ready to weld so you don't waste his time as he is on the clock, he can watch you weld the tubes together and see how your welds look.

If your welds are too hot or too cold he can see what you need to change, maybe a lesson or two could put you right in the ball park.

When building my race car in the 60's i went to night school wending class and it was one of the best things i ever did, nothing like knowing that your welding is correct on your own racer!!! ' Priceless '

Don


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 27, 2013, 06:37:46 PM
That would be the best way, "unfortunately" I have already welded most of the frame so I canīt do it that way. I have a friend who builds top fuel chassis (LG Eriksson, ME Racing) who probably could take a look at my work and hopefully give me thumbs up. Would that suffice?

I mean, is there any rule that says that the welds need to be closely inspected or is it enough that they look ok and havenīt shown any cracks during a couple or seasons of racing?

Tonight I started making the brackets for the fairings, I had to get something done today so I wonīt have to be in the workshop all easter. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011066.jpg)

I strengthened the fairing nose with riveted aluminum and made chromemoly brackets which were then welded to the steering head. I need several more brackets to hold everything in place but at least the fairings stays in place without zip ties now.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011069.jpg)

The thing that took the longest was to find the right position for the fairings before I made the brackets, compared to the earlier pictures the fairings sit lower and further forward which makes the front fender look a bit less gigantic. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011067.jpg)

The next step will be to cut down the sides of the fairings a little and strenghten them properly before making brackets for them.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011068.jpg)

I managed to get three hours in the workshop before my feancee called and told me that our youngest daugher has got stomach flue, this will probably be one interesting easter... :|

Cheers!
/Anders


Title: Re: APS Ω Gas turbine bike build
Post by: Stainless1 on March 27, 2013, 07:06:12 PM
Nobody is going to inspect your welding at tech inspection unless the welds look obviously bad.  It is for your own safety that folks suggest having someone look at it if you are not a regular welder.  It makes a difference when you are welding CM to know what you are doing. 
Are you confident that the frame won't come apart at 200 MPH?
Have you put in ample braces and gussets to hold the weight of the bike and rider?
It is your butt on the seat.


Title: Re: APS Ω Gas turbine bike build
Post by: wobblywalrus on March 27, 2013, 11:07:35 PM
Sometimes it is a good idea to have some gussets and bracing to give the chassis some redundancy.  In other words, there is more than one weld holding together all of the vital stuff.  My Triumph is set up that way.  It is extra work but worth it for the "peace of mind" you will get when going fast on a bumpy track.     


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 28, 2013, 12:25:43 AM
Thanks for the clarification, the tig welds look good and I am using the right filler rod so I am confident that they are strong enough. The frame will get more braces at the weak points later and I will add steel plates where the frame tubes meets the steering head as an extra safety.

Iīve been told to avoid putting too much heat into CrMo so I have been careful while welding.

Good to hear this so I wonīt be anxious about the tech inspection, in drag racing you arenīt allowed to paint a CrMo frame so I thought the same rule applied here but then it would start to rust in no time in the salt. :-(


Title: Re: APS Ω Gas turbine bike build
Post by: DND on March 28, 2013, 01:55:14 AM
In the early drag racing days a fellow i knew bought a pro built top fuel car and the frame was gas welded with way too much heat.

He got into to a side wind in the finish line light's and it rolled and came all apart, and he lost his life.

The welds held but the parent metal next to the welds all split and came apart from the way to hot welding joints.

That is why it is good to have a pro look at your stuff , so you know inside that your welding is OK for future work.

You don't want to wait for cracks to show up , that is not good at all because if it gets welded together properly they should never crack.

Don


Title: Re: APS Ω Gas turbine bike build
Post by: Mobacken Racing on March 28, 2013, 04:03:14 PM
Iīve heard stories about CrMo cracking just outside welds, shows how important it is to know the material well.

About another thing, just how much of the bike will be subjected to salt spray during a run? I guess it depends on how wet the salt is, so lets say in the worst possible conditions. I use the LSR5 front fender from Airtech by the way.

It is vital that no salt will reach the nose section of the fairings since the engine intake will be there, I cannot filter the air in any way since there isnīt anywhere near as much room as a non-restricting air filter would need. The engine consumes 1m3/s and even the smallest restriction in the air flow will cause overheating and possible engine damage.



Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on March 28, 2013, 06:15:34 PM
the salt is going to get in places you didn't even know you had.
it will be everywhere. it's in the air.

keep the intakes plugged until you run.

it's been going on for over 60 years and the mill will survive.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on March 28, 2013, 06:54:19 PM
Anders;

Most race car and aircraft builders who use chrome- moly tubing use it in "Condition N", normalized. The weldment doesn't need to be heat- treated if it is welded properly. Gas welding spreads the heat over a wider area so the joint has less built- in stress than a TIG weld. TIG is fine, though, if it is carefully done.

That's an interesting project you have there.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on March 28, 2013, 09:41:07 PM
Dont be afraid to weld, cut, break a few test coupons. It will tell you alot about the condition you leave a weld joint. If the parent metal lets go, or the weld does.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 29, 2013, 03:17:00 AM
the salt is going to get in places you didn't even know you had.
it will be everywhere. it's in the air.

keep the intakes plugged until you run.

it's been going on for over 60 years and the mill will survive.

Ok, so it is like fine dust blowing around?

What about during the run, some turbo vehicles run filterless with the intake high up in front. Are they still ingesting salt or is the air there free from particles? The compressor would show signs of wear on the inducer edges very soon if salt is present in the air.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 29, 2013, 03:20:46 AM
Anders;

Most race car and aircraft builders who use chrome- moly tubing use it in "Condition N", normalized. The weldment doesn't need to be heat- treated if it is welded properly. Gas welding spreads the heat over a wider area so the joint has less built- in stress than a TIG weld. TIG is fine, though, if it is carefully done.

That's an interesting project you have there.

Regards, Neil  Tucson, AZ

Early CrMo dragrace frames were soldered and that seems to work as well, Iīll show the frame to my frame building friend and stop worrying about it.

Thanks! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 29, 2013, 03:21:44 AM
Dont be afraid to weld, cut, break a few test coupons. It will tell you alot about the condition you leave a weld joint. If the parent metal lets go, or the weld does.

That is a good idea, never hurts to do some tests to see how much heat is needed to weaken the surrounding metal.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on March 29, 2013, 10:47:07 AM
"Early CrMo dragrace frames were soldered and that seems to work as well, Iīll show the frame to my frame building friend and stop worrying about it. "

Anders;

I think you might mean "Brazed"....ordinary lead/tin soft solder is nowhere near strong enough for structures.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 29, 2013, 12:56:06 PM
"Early CrMo dragrace frames were soldered and that seems to work as well, Iīll show the frame to my frame building friend and stop worrying about it. "

Anders;

I think you might mean "Brazed"....ordinary lead/tin soft solder is nowhere near strong enough for structures.

Regards, Neil  Tucson, AZ


Hi Neil,

Of course, here in Sweden we call it hard soldering so I simply used the wrong word.


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on March 29, 2013, 03:04:02 PM
Part of the international flavor of this group, we get to know all the different words and spellings

I find myself spelling things differently here than an Australian forum

The salt is often slightly damp, but with a sometimes dusty surface , depending on traffic etc

we get very little salt in the bikes with front air intake , much less than the turbo with low intake and filter
 but still see signs of minor tip wear over over a couple of yrs, not sure if the foam rubber seal at the turbo intake is 100% either
potentially this is more of an issue than front air with a good front fender   


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on March 29, 2013, 03:39:46 PM
I thought the grain structure was too tight to properly braze, weakening the parent metal dramatically, making it very brittle? Or an I thinking of the wrong metal?


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on March 29, 2013, 03:41:59 PM
No, you are right-- brazing chrome-moly is not recommended. It reduces its fatigue life. I read a study of that by Lockheed years ago. It is just fine for mild steel, though.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on March 29, 2013, 03:46:10 PM
the salt is going to get in places you didn't even know you had.
it will be everywhere. it's in the air.

keep the intakes plugged until you run.

it's been going on for over 60 years and the mill will survive.

Ok, so it is like fine dust blowing around?

What about during the run, some turbo vehicles run filterless with the intake high up in front. Are they still ingesting salt or is the air there free from particles? The compressor would show signs of wear on the inducer edges very soon if salt is present in the air.

I don't think it's a good idea to run without a filter.

there are some very fast metric turbo bikes that run air filters.

bf


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on March 29, 2013, 04:16:57 PM
Anders,
looking at your post in reply number 38 ; got me thinking you were running a turbo engine.
I forgot about your turbine.

is there even an air filter for that type engine?
are you going to run any type of ballistic shield around the turbine?

you have a very nice build going on.
good luck and ride safe.

franey


Title: Re: APS/Ω Gas turbine bike build
Post by: 38flattie on March 29, 2013, 07:52:44 PM
Wow! I don't know how I missed this build!

This build excites me more than my own. I've dreamed of jet cars and bikes since I was a little kid!

Good luck! :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 30, 2013, 11:35:57 AM
Anders,
looking at your post in reply number 38 ; got me thinking you were running a turbo engine.
I forgot about your turbine.

is there even an air filter for that type engine?
are you going to run any type of ballistic shield around the turbine?

you have a very nice build going on.
good luck and ride safe.

franey

Thanks! :-)

Industrial turbines often have air filters but since they are stationary weight and space is of no concern. For an engine this size I would need several m2 of filter area to avoid pressure loss, and the risk of ingestion of the filter material in case of a filter failure is probably greater than Foreign Object Damage with a cleverly placed air intake.

The engine itself is built to contain its parts in case of a burst compressor wheel, and I will make sure the fuel system cannot supply the engine enough fuel to overspeed. Some heat shielding will probably be a good idea though around the section between the gas producer and the power turbine, my knees would most likely catch fire otherwise... :-D

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 30, 2013, 11:37:25 AM
Wow! I don't know how I missed this build!

This build excites me more than my own. I've dreamed of jet cars and bikes since I was a little kid!

Good luck! :cheers:

Glad you like it, hopefully I will get it overseas some day so you can see it in first person. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 30, 2013, 11:39:51 AM
Part of the international flavor of this group, we get to know all the different words and spellings

I find myself spelling things differently here than an Australian forum

The salt is often slightly damp, but with a sometimes dusty surface , depending on traffic etc

we get very little salt in the bikes with front air intake , much less than the turbo with low intake and filter
 but still see signs of minor tip wear over over a couple of yrs, not sure if the foam rubber seal at the turbo intake is 100% either
potentially this is more of an issue than front air with a good front fender   

That sounds promising, my large fender will keep the salt stuck to the tyre from being thrown up in front of the intake. Another thing I donīt need to worry about then, great news! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: 38flattie on March 30, 2013, 11:55:43 AM
Wow! I don't know how I missed this build!

This build excites me more than my own. I've dreamed of jet cars and bikes since I was a little kid!

Good luck! :cheers:

Glad you like it, hopefully I will get it overseas some day so you can see it in first person. :-)

That would be very cool!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 03, 2013, 02:36:43 PM
Last night I got some random bits and pieces done, and today Iīve talked with a local metal working shop named Fixit and they will cut splines on the gearbox output shaft so the front sprocket for the chain drive can be fitted to it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011070.jpg)

With the shaft taken out of the gearbox I can start planning how to make the oil jets who will inject oil into the gear mesh and ball bearings, a large diameter return line will also be fitted to the bottom of the gearbox so the oil can return to the tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011071.jpg)

I have also started on some more struts for the front fairing, the fairing quality is kind of lousy so I need to force it into shape with the struts.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011072.jpg)

I have also made a battery mockup with the same dimensions as the Deka Dominator 51Ah battery I will get for the bike, it is a special total loss battery which is much more suited for this than a normal starter battery that leaves massive cranking amps but loses voltage much faster.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011073.jpg)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Captthundarr on April 03, 2013, 02:57:38 PM
Build on my friend, as I have had asperations of building a turbine powered lakester/ line for one mile events :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: 8pack on April 03, 2013, 03:03:20 PM
Anders,
looking at your post in reply number 38 ; got me thinking you were running a turbo engine.
I forgot about your turbine.

is there even an air filter for that type engine?
are you going to run any type of ballistic shield around the turbine?

you have a very nice build going on.
good luck and ride safe.

franey

Turbine ag planes run air filters (most use a filter with a Napa part # that is designed for trucks) or a person could use a setup kinda like a helicopter.


Title: Re: APS/Ω Gas turbine bike build
Post by: charlie101 on April 03, 2013, 03:07:21 PM
In my layman point of view, I get the impression that you load the bike up with a lot of weight at the rear, there is significant lift with a motorcycle fairing at the front because of the general "hump back" shape and poor rear slip shape. I have no experience to really talk about it, and I can't judge in this case, but it would be interesting to hear a discussion on the forum about it. If that's the case that the bike end up too light at the front at speed, than you would need to have a front fairing that makes a lot of air resistance in order to push down the front.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 03, 2013, 04:34:41 PM
In my layman point of view, I get the impression that you load the bike up with a lot of weight at the rear, there is significant lift with a motorcycle fairing at the front because of the general "hump back" shape and poor rear slip shape. I have no experience to really talk about it, and I can't judge in this case, but it would be interesting to hear a discussion on the forum about it. If that's the case that the bike end up too light at the front at speed, than you would need to have a front fairing that makes a lot of air resistance in order to push down the front.

I hear you, unfortunately I am sort of hand cuffed since the two heaviest parts (battery and gearbox) cannot be placed anywhere else but where they are right now. What I can do is to add lead weights at the front to balance things out a bit.

I agree that it would be very interesting to hear the opinion of the experienced racers on this matter.



Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on April 03, 2013, 06:08:47 PM
I don't have any fairing experience, yet.
I have researched it from from Diff'rent fairing manufacturers.
and this has to do with stock fairings also.
      the fairing needs to be level with the bike and the ground.
      not pointed up - lift
      not pointed down - it will compress the front forks

when you get up to speed the bike should level out.

that weight@ the rear is good for traction. it's better to keep the weight as low as possible.
I wouldn't put much weight on a motorcycle front end.


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on April 03, 2013, 09:03:50 PM
Your front fairing looks to me like it will give downforce, there is no large frontal area for radiator and it does not curve around the wheel
 but rather diverts the air to the sides , and your underside will be turbulant so its not like your making a wing

another option for fairing strength is  few more layers of fibreglass inside the body will increase rigidity and reduce the need for extra bracing


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on April 03, 2013, 10:21:17 PM
Every now and then someone will take a photo of a bike running through the timed mile when the light angle is just right and the salt halo is seen.  It is a very fine dispersion of salt around the vehicle and rider.  Pretty much everything down low and to the rear is in it.  The only places where it is not are the front upper quarter of the bike.  This would be the rider's helmet, upper shoulders, windshield, and the upper front of the fairing.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 03, 2013, 10:36:43 PM
I don't have any fairing experience, yet.
I have researched it from from Diff'rent fairing manufacturers.
and this has to do with stock fairings also.
      the fairing needs to be level with the bike and the ground.
      not pointed up - lift
      not pointed down - it will compress the front forks

when you get up to speed the bike should level out.

that weight@ the rear is good for traction. it's better to keep the weight as low as possible.
I wouldn't put much weight on a motorcycle front end.

Iīll note this, thanks for the info!

Your front fairing looks to me like it will give downforce, there is no large frontal area for radiator and it does not curve around the wheel
 but rather diverts the air to the sides , and your underside will be turbulant so its not like your making a wing

another option for fairing strength is  few more layers of fibreglass inside the body will increase rigidity and reduce the need for extra bracing

Then I am on the right track at least, good to hear. The fairings will eventually be used as a plug to make a new and considerably stronger fairing later when I have given it the shape I want, so no reason to strenghten it in any fancier way than aluminum struts and rivets at this point. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 03, 2013, 11:02:38 PM
Every now and then someone will take a photo of a bike running through the timed mile when the light angle is just right and the salt halo is seen.  It is a very fine dispersion of salt around the vehicle and rider.  Pretty much everything down low and to the rear is in it.  The only places where it is not are the front upper quarter of the bike.  This would be the rider's helmet, upper shoulders, windshield, and the upper front of the fairing.   

That is exactly what I wanted to hear, thank you! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 05, 2013, 04:22:25 PM
With the kids asleep and the feancee out on a party I had the evening for myself, and the result was that I headed out to the workshop. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011074.jpg)

I got a package with a bunch of nice small aluminum weld lids for the fuel and oil tanks today, I canīt remember how I ever got anything done before I discovered Ebay...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011075.jpg)

A couple of hours more on the brackets for the fairings, now they stay in place enough so I can strenghten the sides and make brackets there as well.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011076.jpg)

I have decided to skip the PWM controller and use my old trusty needle valve I made for my turbine pocketbike years ago, a very simple design that regulates the fuel pressure by choking the internal fuel return flow.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Gasreglage1.jpg)

This is exactly in line with my goal to have the bike as field repairable as possible, if it starts to leak or jam I only have to fit new needle seals and then it is as new again. No bloody PWM controller that burns out in the middle of nowhere, been there done that with the jet sled weīve been racing at the Swedish Ice landspeed event...>:(

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Gasreglage12.jpg)

After testing different needle profiles I found one that produced a decent flow curve.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Gasreglage14.jpg)

I even made a test rig for it, hard facts tends to beat guessing sometimes. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Fuelpressuregraph2.jpg)

Right now is it under a thick layer of dust in my friends barn, I will go get it this weekend and clean it up some.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on April 05, 2013, 09:39:45 PM
  There is so much satisfaction in doing things yourself. If it works, pat yourself on the back. If it doesn't. Do it over and improve on your design. Doesn't get much better than this.
   Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 06, 2013, 02:41:09 AM
Exactly, knowing that you are building something from scratch that might become the fastest on earth some day is very satisfying. If it takes 40 years to get there doesenīt matter since it is the way there that matters. :-)

By the way I will most likely build a new throttle block so I can integrate a max pressure relief valve to it, it will be used as a throttle stop so I canīt rev the engine past what is healthy.



Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on April 06, 2013, 09:30:10 PM
  Sort of a turbine waste gate.
  Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 09, 2013, 02:59:18 AM
 Sort of a turbine waste gate.
  Doug  :cheers: :cheers: :cheers:

Kind of. :-)

Iīve finished the bracket manufacturing for now, the fairings are firmly fixed and will be even more so later when I have made the transition pieces down to the aluminum tanks.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011077.jpg)

I adjusted the clearance between fender and fairing so it is as tight as possible without them touching while turning or braking hard. An extra high windscreen is ordered from England specially made for these kind of fairings so as soon as it arrives I will see if I can tuck myself in completely behind the fairings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011078.jpg)

After that I started building a new throttle valve with an integrated pressure release valve for extra safety against over revs, the old one was a bit bulky and lacked the safety valve so I figured it was best to make one that fits the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011079.jpg)

I didnīt take much photos but here I am milling out the slot for the throttle arm.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011081.jpg)

Drilled, tapped and soon countersunk for an M6 insex bolt.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011082.jpg)

I got this far last night before it was time to go to bed, 30 minutes past midnight. Itīs a good thing that I donīt need very much sleep, frees up many extra workshop hours each week! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011083.jpg)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: gidge348 on April 09, 2013, 08:52:08 PM
Top build Anders love what you are doing.
Just a quick question, would it not be better to have the start battery on your support vehicle as once the engine is lit you don’t need all that cranking power anymore?
 Then you only have to carry a small battery to run gauges, data logging etc?
Save a lot of weight in places you may not want it and make packaging a whole lot easier. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 09, 2013, 11:06:51 PM
Top build Anders love what you are doing.
Just a quick question, would it not be better to have the start battery on your support vehicle as once the engine is lit you don’t need all that cranking power anymore?
 Then you only have to carry a small battery to run gauges, data logging etc?
Save a lot of weight in places you may not want it and make packaging a whole lot easier. 


The battery is actually the heart of the bike, the gas turbine engine has journal bearings just like a turbocharger that needs 3-5 kg of oil pressure to survive. Since I cannot fit a gravity drain for the oil I use two scavenge pumps that sucks the oil out of the bearing tunnel after it has passed through the bearings. That makes three large oil pumps that runs on 12V.

In addition to that I need a fuel pump capable of 5 bar and some other stuff that runs on battery as well so the bike consumes a lot of energy, I measured the total amperage draw on the pumps with 10°C oil and found that it was in the region of 50A so I need one hefty battery. :-)

As if that wasnīt enough I need some overcapacity to make sure that the battery lasts longer than the fuel, if I lose oil pressure the engine runs dry and destroys itself in seconds... :|


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on April 10, 2013, 10:08:35 AM
Would yoube able to run an alternator off of the output shaft of the gear box? It will get you extra run time and voltage will deteriorate much less at the end of the run.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 10, 2013, 11:18:23 AM
Iīve given the idea some thought during the frame design phase but there is simply not enough room, plus it is one more thing that can cause trouble during a run. :-(

The battery would still have to be quite large since it has to be able to cope with a generator failure, Iīve invested way to much work and money in the engine to risk it just to be able to use a smaller battery...


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on April 10, 2013, 01:08:23 PM
A big battery is an asset in most land speed racing where traction is needed to gain speed.  Don't worry about reducing weight unless you've got plenty of good traction.  On ice I'd expect you'll want all the help you can get to hook up.


Title: Re: Re: APS/Ω Gas turbine bike build
Post by: bbarn on April 10, 2013, 03:30:56 PM
Look at some of the lithium ion batteries that are available. There are some high amp batteries that are incredibly small and they have a discharge rate that is steady until they are dead. You can get an 18v that weighs a few pounds and is roughly 3 inches thick by 6 inches tall and maybe 8 inches long.

They are pricey especially your first one because the charger is almost as expensive as the battery. Recharge time is way faster than a lead/acid battery too.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 10, 2013, 05:53:55 PM
I totally agree Jon, weight is my friend as long as it is in the right place like it will be here.

I did some research on lithium batteries but the ones I could afford were too cheesy to be trusted. When I found that I could get a higher quality battery for like 1/5th of the price it was an easy choice to pick the lead gel battery instead.

Tonight I continued working on the thottle regulator, I had big plans to draw everything up very professionally in a CAD program instead of the ususal figuring out the design while I build with drawings made on some greasy cardboard piece. It didnīt work out... :roll:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011084.jpg)

Testing the fit of the needle valve, a snug fit.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011085.jpg)

Threading the bolt circle that will hold the needle valve O-ring cover in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011086.jpg)

Here I am about to drill the seat for the fuel pressure safety valve, a spring loaded 10mm steel ball will be set to open slightly above the full throttle fuel pressure to make sure I canīt over fuel the engine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011087.jpg)

Not very easy for you to follow all the drilling and milling so I made some kind of explanation how the channels are routed. The fuel enters from the pump and leaves to the injectors from the lower fuel line, and the upper line is the bleed return line to the tank that both the throttle needle valve and the safety valve dumps fuel into.

The needle valve regulates the fuel flow through the bleed line thus regulating the fuel pressure to the engine. Simple and bullet proof. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011088.jpg)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Captthundarr on April 10, 2013, 08:53:02 PM
AH-Ha now I get it. It can't run away if it ain't got no fuel :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on April 11, 2013, 12:21:14 AM
An airplane mechanic friend told me that jet engines are simpler than piston driven ones.  Now I see why.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 11, 2013, 02:27:53 AM
AH-Ha now I get it. It can't run away if it ain't got no fuel :cheers:

Exactly, as simple as that on a gas turbine. On a piston engine you would melt the pistons if you leaned the AFR out but a turbine simply loses revs if it gets less fuel.

An airplane mechanic friend told me that jet engines are simpler than piston driven ones.  Now I see why.

Many people donīt understand this and think building a model gas turbine is waaaay more difficult than say a model v-twin glowplug engine, nothing could be further from the truth. Tolerances are sloppier and there is only one moving part in the engine. Didnīt say that they are easy to build though, just not as difficult as most seem to believe.


Title: Re: APS/Ω Gas turbine bike build
Post by: gidge348 on April 11, 2013, 08:39:22 PM
An airplane mechanic friend told me that jet engines are simpler than piston driven ones.  Now I see why.
Yep,
   That’s right, think of a turbocharged piston engine, turbo compressor, inlet valves, pistons, cams, crank, suck, squish, bang and push, exhaust valves, exhaust turbine.

   Now throw away everything between the turbo compressor and exhaust turbine and just put in a burner can...... hey presto.... jet engine.

   The only down side is takes longer than a piston engine to reach full revs and uses mucho fuel. Not really a problem in aircraft or land speed racing.


Title: Re: APS/Ω Gas turbine bike build
Post by: Frank06 on April 13, 2013, 09:22:32 PM
What are you using for oil pumps?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 14, 2013, 02:13:15 PM
I use a Marco UP12 gear pump for oil pressure and two universal gear pumps (used for pumping diesel etc) capable of 15L/min to suck the oil out of the engine.

The reason I use two scavenge pumps is because the oil gets mixed with air in the engine and froths badly so I need an overcapacity to avoid filling the shaft tunnel with oil, another benefit is that if one pump stops for some reason the other one should keep the oil from flooding the bearings until the run is over. There is no practical way of monitoring if the pumps are working or not so two pumps gives a measure of security.

Iīve spent four hours this weekend on the throttle regulator, now I need to buy some fittings and stop bolts before I can do anything more.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011089.jpg)

I made a lid for the needle valve and grided the o-ring spacer so the rings got a perfect fit around the needle valve shaft when the lid was in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011090.jpg)

The hole for the pressure relief valve got M12 threads so a bolt can be used to adjust the spring pressure, this way I can adjust the max fuel pressure.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011091.jpg)

Risking ten of my fingers I freehanded a throttle lever on the circular table saw, the last touch was done with a flap disc on the angle grinder.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011092.jpg)

After some fine tuning I got a throttle wire play of 22mm between idle and full throttle, should be enough since I shouldnīt need any finer control of the revs.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: salt27 on April 14, 2013, 04:07:54 PM
Anders,
Just is case you were not aware and you do make it to Bonneville the SCTA rules state "control levers shall have at least a 1/2 in. diameter round ball end". (7.B.4)

Very impressive machine work.

 Don


Title: Re: APS/Ω Gas turbine bike build
Post by: 38flattie on April 14, 2013, 04:43:34 PM
Amazing!

Keep up the great work, Anders!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 15, 2013, 01:44:13 AM
Anders,
Just is case you were not aware and you do make it to Bonneville the SCTA rules state "control levers shall have at least a 1/2 in. diameter round ball end". (7.B.4)

Very impressive machine work.

 Don

Thanks! :-)

No worry about the 1/2" ball ends, this is no hand lever but a throttle wire lever, the end of the arm will be drilled for the throttle wire and I will use a regular twist throttle on the handlebars.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 15, 2013, 01:44:40 AM
Amazing!

Keep up the great work, Anders!

Will do! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 16, 2013, 04:23:40 PM
Today I finished most of the throttle regulator except for the wire mount and some drilled holes for fitting the regulator to the air box, that will have to wait until I get the throttle grip I ordered a couple of days ago.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011093.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011093.jpg.html)

The holes for the fuel ports were drilled and threaded with R1/4" and the holes in the end were threaded to be blanked off.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011094.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011094.jpg.html)

With the holes blanked off and JIC 7/16" couplings fitted (same as AN4) the regulator looks like this. I will probably do something about the finish later when I know that it works like it should, until then it is a waste of time to do any polishing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011095.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011095.jpg.html)

The next project for the evening was to continue building the air intake for the engine, I rolled an aluminum plate into the right shape and fixed it to the frame.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011096.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011096.jpg.html)

Then I split an aluminum tube to get a radius for the front wall of the air intake, this should make the ram air enter the air box a little bit better. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011097.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011097.jpg.html)

With those parts tacked together I could make a template of the side walls.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011098.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011098.jpg.html)

I only had enough aluminum for one side at home so I will have to go get the rest of my stash later.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011099.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011099.jpg.html)

This is what it will look like anyway, the engine looks smaller and smaller as the air intake grows but it is needed if the engine is to get particle free air. The Y2K bike at Bonneville hadnīt room for more than a crude screen and it hardly made it out of the pits despite its 400hp Allison 250 C18 engine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011100.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011100.jpg.html)

One last thing I did before I called it a night was to sketch a bit more on the ram air intake on the fairing, I can sacrifice some intake area to get the looks right since the space between the fender and fairing lets lots of air through so the engine should get more than enough air anyway.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011101.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011101.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 18, 2013, 06:52:48 AM
Got the throttle grip today, a very compact one so even with the front brake in place it doesenīt stick far outside the fairings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011102.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011102.jpg.html)

As Salt27 stated there is a rule that the levers must have a 1/2" ball at the end, but is there any rule how long/short the grip can be? Can I shorten the original brake grips so they donīt stick outside the fairings and weld an aluminum ball at the end or do they need to have a certain minimum length?

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on April 18, 2013, 02:09:58 PM
10 inches between your thumbs I think... other than that they can be as short as your hands can fit. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 18, 2013, 04:14:21 PM
Thanks for that, no problems with the thumbs since I use standard forks so itīs all good then! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 21, 2013, 01:10:30 AM
I had a beer, rum and workshop evening last night, it was badly needed for a modern man at home with the youngest kid all week long. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011105.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011105.jpg.html)

Two holes for M6 insex bolts were drilled in the throttle regulator and a throttle wire mount was made and welded to the regulator, now it is ready to be fitted to the bike for good.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on April 21, 2013, 01:47:52 AM
My best friend Guido is a Dane and he also loves Rum after work. What is it with you guys? :cheers: Nice work man.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 23, 2013, 01:32:24 PM
Rum is mum for the gum. :cheers:

Last night I fitted a pair of Spider throttle grips, very fancy with Shock Absorbing™ and all. To me they just looks like a pair of rubber tubes though... :roll:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011109.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011109.jpg.html)

The throttle wire was fitted after I made a adjustable wire bolt, I started making one from scratch in brass but halfway through I remembered that I had wrecked my M8 threading die so it was the scrap bin for the fancy brass screw. I ended up drilling through a long M8 bolt instead... :-(

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011110.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011110.jpg.html)

At this setting things should be passing by rather fast. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011111.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011111.jpg.html)

Iīve bought a 1 1/2" Autometer fuel pressure gauge which dropped in a couple of days ago, I will fit it after both the fuel filter and the solenoid so I can see exactly what pressure the injectors see.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011112.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011112.jpg.html)

I also had to cut the front wheel stand down 4cm to get clearance for the fender, it is a tight fit but it works.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011113.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011113.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on April 23, 2013, 11:35:57 PM
Anders, it might be a good idea to ride it and make sure the handling is OK before you cut the ends off of the bars.  Sometimes a fella needs some leverage. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Ellwood on April 24, 2013, 02:00:08 AM
Anders, i reccommend Fakir throttle grips for shock absorbing. Only problem is they are rarer than rocking horse poo, unless anyone in the States knows where to get hold of a pair.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 24, 2013, 02:44:57 PM
Anders, it might be a good idea to ride it and make sure the handling is OK before you cut the ends off of the bars.  Sometimes a fella needs some leverage. 

Good idea, I can slide the bars in some in the mounts to have some adjustment possibilities later. Hopefully I can ride with the hands this tight together since they would be mostly hidden inside the fairings.

Ellwood: I have seen your bike grips, they look almost scary! :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on April 24, 2013, 06:01:12 PM
SCTA rules are that your opposing thumbs on the handlebars must be at least 10 inches apart.  That is to guarantee that you'll have some kind of leverage to turn.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 25, 2013, 04:39:12 PM
SCTA rules are that your opposing thumbs on the handlebars must be at least 10 inches apart.  That is to guarantee that you'll have some kind of leverage to turn.

I just measured the distance between the thumbs as the handlebars are now and it is 35cm, no problems in other words. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on April 25, 2013, 04:56:52 PM
Is it AMA and FIM that need 6 "  from the forks to the end of the bars ?



Title: Re: APS/Ω Gas turbine bike build
Post by: Cereal KLR on April 25, 2013, 10:32:11 PM
Amazing build  8-)

Bikes require a way to "kill" engine if separated from the vehicle. How quickly will this spool down once fuel supply is stopped?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 26, 2013, 07:07:14 AM
Amazing build  8-)

Bikes require a way to "kill" engine if separated from the vehicle. How quickly will this spool down once fuel supply is stopped?

It will flame out immediately when the fuel flow is stopped, even if it takes a while for the revs to drop to zero no power is produced since the heat is gone.

Last night I spent some time on the remaining fuel system, I needed to connect the fuel shutoff solenoid, fuel filter and fuel pressure gauge somehow.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011114.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011114.jpg.html)

I cut a chunk of aluminum off a longer rod and trued it on the mill.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011115.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011115.jpg.html)

Drilling and milling, the same old story as always. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011116.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011116.jpg.html)

A couple of  JIC 7/16" couplings later and it was finished!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011117.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011117.jpg.html)

I need a 1/8"-27 die to make the coupling between the fuel filter and solenoid, will try to borrow one this weekend.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 29, 2013, 03:13:12 PM
I borrowed a die from a friend a couple of days ago and modified some hydraulic couplings so the package with filter, solenoid and pressure gauge can be made as compact as possible.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011118.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011118.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on April 29, 2013, 04:46:53 PM
How much flow does the solenoid have ? and how many lit/min do you need for the hp ?
is there a common usage number or are turbines all quite different


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 02, 2013, 01:36:16 PM
How much flow does the solenoid have ? and how many lit/min do you need for the hp ?
is there a common usage number or are turbines all quite different

I havenīt actually measured the flow yet, I will do so as soon as I have hooked everything up on the bike. If it doesenīt flow the ~1.5L/min needed I will run without it and use the fuel pump as the safety shutoff instead.

The fuel consumption per horsepower per hour depends mostly on the pressure ratio in the gas turbine, similar to the compression ratio in a piston engine. Higher compression ratio gives a more efficient combustion hence less waste of fuel.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 07, 2013, 04:44:01 AM
Yesterday I got the windscreen I ordered a week ago, looks like a perfect fit so far. When I manage to find someone to hold the camera I will have some pics taken with me fully dressed trying to hide behind the fairings. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011119.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011119.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 13, 2013, 01:10:21 PM
(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011120.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011120.jpg.html)

But what is this? Something has gone missing!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011121.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011121.jpg.html)

Phew, there it is!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011122.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011122.jpg.html)

The reason for removing the air intake was to fit the oil pump to it, much better place than to have it hanging under the upper frame tube like it did before.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011123.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011123.jpg.html)

Next up was to fit the fuel filter/pressure gauge combo, the solenoid had to go since it was just one more thing that could cause problems.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011124.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011124.jpg.html)

With the filter placed well below the fuel inlet port on the engine no kerosene can dribble into the engine any way after shutdown.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011125.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011125.jpg.html)

Time to start figuring out how to hook everything up, I have to think it through properly before I go shopping for AN couplings since they arenīt exactly cheap...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011126.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011126.jpg.html)

I started making AN weld fittings for the fuel and oil tanks on the lathe but after a while I decided that the few bucks they cost at the local race store is well worth it to save some trouble. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011127.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011127.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Jon on May 13, 2013, 02:37:59 PM
Do you need the solenoid for rules compliance?, I guess not if your running an electronic fuel pump.

Looking good.
jon


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 13, 2013, 04:27:07 PM
Do you need the solenoid for rules compliance?, I guess not if your running an electronic fuel pump.

Looking good.
jon

Hi Jon,

No, it was mostly a way for me to keep the fuel lines from emptying after the engine has been shut off. As you say I can just as quickly stop the engine by turning off the fuel pump. With the filter placed below the engine I have no need for the solenoid.

Thanks!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 14, 2013, 02:52:29 PM
Today I bought a handful of AN fittings and continued hooking the oil lines up.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011129.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011129.jpg.html)

I had to mill a slot in the front engine mount to get enough clearance for the scavenge pump line above the fuel tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011128.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011128.jpg.html)

The left side scavenge pump connected to the engine and oil tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011131.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011131.jpg.html)

The right side scavenge pump, I need to get a 45° AN6 fitting to connect the pump to the tank at the right angle.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011130.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011130.jpg.html)

The fuel pump hooked up to the oil pressure regulator, I am not sure what AN size the suction line from the oil tank should be so Iīll save that one for later. AN8 should work but perhaps it is better to go up one size to make sure the pump isnīt strained.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011132.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011132.jpg.html)

Now it is time to go shopping for more fittings, a 40mm aluminum tube is also needed to make the fill necks to the tanks.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 17, 2013, 01:49:11 PM
The sight glasses for the oil and fuel tanks I ordered a month ago finally arrived today!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011133.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011133.jpg.html)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 28, 2013, 05:06:27 PM
Back from a weeks vacation I got some work done on the oil tank today, during my daughters mid day nap I made the filler neck for the oil...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011135.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011135.jpg.html)

...and a weld fitting for the oil temp probe.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011136.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011136.jpg.html)

After she woke up she took the time to test bite some suspicious stuff on the bike to make sure it was built correctly. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011137.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011137.jpg.html)

Tonight I started welding the tank, thanks to an air cooled torch I had to let it rest halfway through unless I wanted to melt the whole thing...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011138.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011138.jpg.html)

At least I got the front welded up, the sight glass is also fitted as you can see.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011139.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011139.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on May 28, 2013, 06:42:43 PM
the tank looks very nice.
what is the sight glass tube made out of ?

Bf


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 28, 2013, 09:51:13 PM
the tank looks very nice.
what is the sight glass tube made out of ?

Bf

It feels like glass at least, good thing you asked because I havenīt even considered the idea that it would be plastic. Not very practical with 80-90°C hot motor oil behind it.

/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 29, 2013, 04:32:50 PM
I finished the oil tank tonight except for the mounts, I will wait with those until the fuel tank is built. In this pic you can see the oil pickup tube that reaches 1/3 into the tank. This will prevent the pump from sucking air when the bike is braked after a run and the oil gathers at the front of the tank, I chose not to fit any internal baffles since I will be accelerating in a straight line so the oil wonīt be all over the place anyway.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011140.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011140.jpg.html)

After that I welded the tank, leak tested it and fixed a small pore that I had missed to spot earlier, nothing interesting enough to take a picture of. I did take some pics when the tank was hung in place though.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011141.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011141.jpg.html)

A busy front end. The welds here looks like crap since I hadnīt finished experimenting with the welder settings but later on the welds started to look pretty decent. It is no show bike so I am happy as long as the tank is leak free. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011142.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011142.jpg.html)

Here is the AN10 fitting for the oil line to the pump, that size should give the pump all the oil it will ever need.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011143.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011143.jpg.html)

I find myself walking around in the workshop with a stupid grin sometimes, this is actually starting to look like a race bike now! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011145.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011145.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 29, 2013, 05:21:09 PM
I finished the oil tank tonight except for the mounts, I will wait with those until the fuel tank is built. In this pic you can see the oil pickup tube that reaches 1/3 into the tank. This will prevent the pump from sucking air when the bike is braked after a run and the oil gathers at the front of the tank, I chose not to fit any internal baffles since I will be accelerating in a straight line so the oil wonīt be all over the place anyway.


Cheers!
/Anders
 (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011140.jpg.html)

This is usually the point where I pipe up about cavitation in oil and fuel pickups
So do you have a a screen of some sort on the end of that pickup hose to prevent cavitation?
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on May 29, 2013, 06:09:42 PM
I hope the tank straps are temp and hard mounts are being made  :roll:


Title: Re: APS/Ω Gas turbine bike build
Post by: rd400f on May 29, 2013, 07:13:47 PM
"sucking air when the bike is braked after a run"

Hi
I have never run on the salt but I was under the impression that you shouldn't be doing any braking at all on the salt....well not at any decent speed anyway.
Thanks
Richard


Title: Re: APS/Ω Gas turbine bike build
Post by: Captthundarr on May 29, 2013, 08:37:12 PM
I hope the tank straps are temp and hard mounts are being made  :roll:

See post #112, first sentance. :roll:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 30, 2013, 01:16:08 AM
This is usually the point where I pipe up about cavitation in oil and fuel pickups
So do you have a a screen of some sort on the end of that pickup hose to prevent cavitation?
G


Hi G!

Nope, no screen at the end of the pickup. How would one prevent cavitation?

"sucking air when the bike is braked after a run"

Hi
I have never run on the salt but I was under the impression that you shouldn't be doing any braking at all on the salt....well not at any decent speed anyway.
Thanks
Richard

Hi Rickard,

Well, if I get up to 200mph I will eventually need to get back down to a halt. I have no idea how the engine will behave after I close the throttle but since I have no clutch to disengage I have to assume that it will brake relatively hard.

By the way I remembered just now that there will be an oil return flange on top of the tank just under the gearbox, I will fit the flange to a larger removable lid that can be used for tank inspection/cleaning later if needed.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on May 30, 2013, 11:40:06 AM
Looking great Anders! Hope to see that thing out on the salt one day!  :cheers:

As far as your welds go, I'm with you! If they look a little shabby but they don't leak, who cares!

Keep it up man! I love this build!


Title: Re: APS/Ω Gas turbine bike build
Post by: DND on May 30, 2013, 02:06:37 PM
Hi Anders

Since you are making a lid for the tank, you could make a swinging oil pick up with a fin on it to follow the oil.

Always have oil then and no air

Don


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on May 30, 2013, 02:45:35 PM
Anders is a Swede -- might not want someone from a neighboring country on his bike.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on May 30, 2013, 11:55:21 PM
Slim... that's awful.


Title: Re: APS/Ω Gas turbine bike build
Post by: Graham in Aus on May 31, 2013, 04:10:45 AM
Took me two days, but !  :roll: I get it...........

 :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 31, 2013, 05:17:20 AM
This is usually the point where I pipe up about cavitation in oil and fuel pickups
So do you have a a screen of some sort on the end of that pickup hose to prevent cavitation?
G


Hi G!

Nope, no screen at the end of the pickup. How would one prevent cavitation?


Cheers!
/Anders

this is my take on it

at the end of your oil pickup with the suction of the pump you get a low pressure area
with that lowered pressure the temprature at which the liquid turns to vapour is lower
so, you get bubbles around the end of the pickup tube where the liquid boils
as a result you get that vortex effect, similar to what happens whan you pull the plug out of your bath or sink
so even though the pickup is under the oil or fuel, you get vapour in the system
you can fix it with a higher head hieght of fuel/oil but your tank is low so this is probably not achievable
now if you put a screen on the end of the pickup, all the other stuff still happens, however it appears you don't get the vortex
I've found with cars if the pickup screen falls off the oil pump you lose oil pressure when you get off idle
and with bikes, if the pickup screen falls off the pump, it still shows pressure but performance drops off significantly
the added considerations are, that you are at Bonneville which is 4000 feet above sea level and as the day goes on
the air gets thinner and your vapour point gets lower. Also, it gets hot at Bonneville, 40°c or hotter.

We run a car at lake Gairdiner in South Australia. we ended up putting a fuel safe foam block in the tank to prevent cavitation
It got to 53°c during the week
After sitting in the queue for half the day, the car, with an aluminium body, was too hot to touch, but ran fine

G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 31, 2013, 04:15:23 PM



Looking great Anders! Hope to see that thing out on the salt one day!  :cheers:

As far as your welds go, I'm with you! If they look a little shabby but they don't leak, who cares!

Keep it up man! I love this build!

Thanks, hope weīll meet one sunny day! :-)

Hi Anders

Since you are making a lid for the tank, you could make a swinging oil pick up with a fin on it to follow the oil.

Always have oil then and no air

Don

That design would work, the downside is that it would add complexity to solve a problem I am not sure exists.

this is my take on it

at the end of your oil pickup with the suction of the pump you get a low pressure area
with that lowered pressure the temprature at which the liquid turns to vapour is lower
so, you get bubbles around the end of the pickup tube where the liquid boils
as a result you get that vortex effect, similar to what happens whan you pull the plug out of your bath or sink
so even though the pickup is under the oil or fuel, you get vapour in the system
you can fix it with a higher head hieght of fuel/oil but your tank is low so this is probably not achievable
now if you put a screen on the end of the pickup, all the other stuff still happens, however it appears you don't get the vortex
I've found with cars if the pickup screen falls off the oil pump you lose oil pressure when you get off idle
and with bikes, if the pickup screen falls off the pump, it still shows pressure but performance drops off significantly
the added considerations are, that you are at Bonneville which is 4000 feet above sea level and as the day goes on
the air gets thinner and your vapour point gets lower. Also, it gets hot at Bonneville, 40°c or hotter.

We run a car at lake Gairdiner in South Australia. we ended up putting a fuel safe foam block in the tank to prevent cavitation
It got to 53°c during the week
After sitting in the queue for half the day, the car, with an aluminium body, was too hot to touch, but ran fine

G


Hi G and thank you for posting the information, very interesting reading since I havenīt been in contact with these problems before.

The oil pickup is oversized by far since the oil passages for the gas turbine bearings are three 1.5mm holes if I remember it correctly, so the oil flow at the end of the pickup will be very slow. I used the same dimensions on the test tank with 1/2 the oil capacity and always had a steady oil pressure and good looking bearing surfaces so I think I am ok.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 31, 2013, 04:19:19 PM
Anders is a Swede -- might not want someone from a neighboring country on his bike.

Youīll have to explain that joke to me some day, I didnīt quite get it. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on May 31, 2013, 05:24:36 PM
with a fin on it        :wink:


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on May 31, 2013, 05:49:02 PM
"a swinging oil pick up with a fin on it to follow the oil."

As in a Finnlander.  Now do you get it?   :roll:


Title: Re: APS/Ω Gas turbine bike build
Post by: Stan Back on May 31, 2013, 07:24:40 PM
Thanx, Jon.


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 31, 2013, 09:59:12 PM
It's not friday here
G


Title: Re: APS/Ω Gas turbine bike build
Post by: salt27 on May 31, 2013, 11:00:27 PM
I think he would have gotten it, had it been a Norwegian on the back. :-D

 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 31, 2013, 11:22:05 PM
Ahhh, now I get it! :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 05, 2013, 12:56:08 AM
Iīve got a fair bit of work done the last couple of days. All of the oil lines are made and some of the fuel lines as well, it is starting to look like a mess and there is more to come. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011151.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011151.jpg.html)

Here is the last oil line from the filter to the engine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011150.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011150.jpg.html)

I also made an AN4 coupling for the fuel pump.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011149.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011149.jpg.html)

In order to finish the fuel lines I had to fit the fuel pump to the frame, I *could* just weld a bracket to the frame and fit it with hose clamps but why always take the easiest route? 8-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011153.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011153.jpg.html)

Two 10mm aluminum plates were stacked on top of each other and the fuel pump bracket build started.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011154.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011154.jpg.html)

Just finished the outer profile.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011155.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011155.jpg.html)

Milling the spots where M6 bolts will hold the frame clamp.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011156.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011156.jpg.html)

What fucking clamp I hear you think, why the one I am cutting loose right now of course! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011157.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011157.jpg.html)

To make life easy I did as much as possible without removing the parts from the rotary table, here I am cutting the slot for the pump clamp.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011159.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011159.jpg.html)

After laying the rotary table down I could mill the hole for the fuel pump.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011160.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011160.jpg.html)

The last .10`s I took away with the arbor tool, notice the washers under the frame clamp so I can tighten it later.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011161.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011161.jpg.html)

After separating the two brackets and filing the worst edges away they looked this fancy. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011162.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011162.jpg.html)

And with the pump fitted:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011163.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011163.jpg.html)

Here the pump is in place with the AN4 fuel line connected, it took some effort but looks a bit better than hose clamps in my opinion.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011164.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011164.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on June 05, 2013, 07:01:21 AM
   Apparently you had a little extra time. Very nice.
  Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Captthundarr on June 05, 2013, 07:18:50 AM
You should see what I can do with a couple of hose clamps, a hacksaw and a 2lb.hammer. :-D Looking sweet Anders.


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on June 05, 2013, 11:17:06 AM
Great looking clamps. Nice to see Slim's filter missed the Ford word :-o


Title: Re: APS/Ω Gas turbine bike build
Post by: Captthundarr on June 05, 2013, 01:00:07 PM
Great looking clamps. Nice to see Slim's filter missed the Ford word :-o

May haps it got lost in the translation.


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on June 05, 2013, 01:25:30 PM
Hunh -- I thought I had that one covered.  Lemme go check -- and that'll teach you to let me know when something is missing. :evil: :evil:

Later - by a couple of minutes:

The "ford" word is in there as Fiat -- but I'd selected the button so the machine only looks for complete words but not when the "naughty" word is a portion of a longer word.  That's the case here.  It brings to mind the hassle that one of the search engines (I think it was one of them) when their dirty word filters wouldn't allow the name of that town in North Lincolnshire, England.  Let's see if one of youse guys can figure it out.  As a hint -- they've got a well-known football (soccer to Americans) team.


Title: Re: APS/Ω Gas turbine bike build
Post by: Graham in Aus on June 05, 2013, 10:52:01 PM
Ha Ha!

Go the Iron!......... :evil:

http://en.wikipedia.org/wiki/Scunthorpe_United_F.C.

 :-P


Title: Re: APS/Ω Gas turbine bike build
Post by: Tofu on June 06, 2013, 07:43:52 AM
I was born and lived in that particular town for 27 years. Written on one of the road signs was "If Typhoo put the tea in Britain who put the **** in S****horpe".

Love the build, the milling work makes me very envious.
Tofu


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 24, 2013, 04:41:40 PM
Thanks guys! :-)

Mats Eriksson who runs ME Racing (pro mod dragracer here in Sweden) has donated 4.5 meter 0.5" chromemoly tubing for the build, thanks a lot!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011172.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011172.jpg.html)

Tonight I got a bit further with the fuel tank, it was a bit tricky to streamline the front of the tank but I think it will turn out ok in the end. First I tacked the bottom piece in place to have something to relate to.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011173.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011173.jpg.html)

Rolling the front of the fuel tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011174.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011174.jpg.html)

After that I cut it to shape.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011175.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011175.jpg.html)

Next up was to weld it to the tank and get the angle right so the radiuses of the tank and the front wheel align.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011176.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011176.jpg.html)

One more piece in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011177.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011177.jpg.html)

Quite some hammering and bending was required to get the right shape for this piece...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011178.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011178.jpg.html)

...which fits in the last gap. The piece for the other side of the tank will have to wait since time was running late, as soon as I have gotten some house painting done that I didnīt bother to do last year I will continue on the tank build.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011179.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011179.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on June 25, 2013, 12:37:14 AM
That idea of having a vise on the table that is not bolted down is a good one.  It is an idea I will copy from you. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 25, 2013, 05:08:13 PM
That idea of having a vise on the table that is not bolted down is a good one.  It is an idea I will copy from you.  

Why Sir that is mearly one amongst the others in the mile long line of brilliant ideas of mine........ohh who am I kidding. I have been meaning to bolt it to the table for almost 4 months now but never gotten around to it. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on June 25, 2013, 06:46:19 PM
That idea of having a vise on the table that is not bolted down is a good one.  It is an idea I will copy from you.  

Why Sir that is mearly one amongst the others in the mile long line of brilliant ideas of mine........ohh who am I kidding. I have been meaning to bolt it to the table for almost 4 months now but never gotten around to it. :-D

When you do Anders, be sure you place it so the stationary jaw is even with or slightly out from the edge of the bench top. That way you can put something vertically in the vise right down to the floor. A lot of people know that but there are a whole bunch more that don't and it's really frustrating to use one of their vises with longer material.

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 25, 2013, 11:10:18 PM
Very good idea Peter, thanks for that! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on June 26, 2013, 06:56:56 AM
   A friend of mine showed me years ago how to clamp a piece of flat stock in the vise and slide the vise up against the bench [possibly with a little clearance], and mark the mounting holes. I've never regretted doing that. Wish the vise mfg. could figure that out and reposition the mounting holes so they don't get so close to the edge of the bench, though.
   Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 26, 2013, 08:20:06 AM
Misery! Just when I was about to start painting the clouds opened and rain started pouring down. Oh well, might as well head out to the shed then. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011180.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011180.jpg.html)

The second "compound curve" part is made and tacked into place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011181.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011181.jpg.html)

Next week I will visit my job to cut out the tank top and after that I can weld the filler neck and fittings to the tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011182.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011182.jpg.html)

Iīve also made a bracket for the steering damper.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011183.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011183.jpg.html)

Here it is fitted, I need it to meet the class regulations and even if I didnīt have to I would still want one. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011184.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011184.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 27, 2013, 04:31:15 PM
Tonight I made the oil tank brackets and hung it in place, first I made some steel brackets and welded two of them to the rear of the frame.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011185.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011185.jpg.html)

Aluminum brackets were made to fit and were welded to the tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011186.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011186.jpg.html)

The same procedure was made for the front brackets, here the tank brackets are cooling off after welding.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011187.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011187.jpg.html)

And a while later the tank was securely in place, feels sturdy enough I think. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011188.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011188.jpg.html)

And a pic from the rear. Next up is to finish the fuel tank, I will cut some sheet aluminum for it after the weekend.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011189.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011189.jpg.html)

Cheers!


Title: Re: APS/Ω Gas turbine bike build
Post by: Jon on June 27, 2013, 06:22:16 PM
Looks good Anders.

How exposed is in that hose in the last pic going to be when your done?

jon


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 28, 2013, 02:08:27 AM
Looks good Anders.

How exposed is in that hose in the last pic going to be when your done?

jon

Thanks Jon!

I will fit a couple of hose brackets on the tanks to keep it from hanging down, but other than that it will be the way it is now. A steel braided hose should survive forever unless I crash the bike but then every other hose is in trouble as well.

/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 28, 2013, 02:02:23 PM
With the girls playing around in the water puddles in front of the workshop I had the opportunity to combine babysitting and bike building! :)

I decided to cut out the air intake on the front fairings, I need to do it before I can build the dashboard for all the gauges.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011190.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011190.jpg.html)

A 3mm aluminum strengthening plate was fitted before I cut the hole just in case the fairings would collapse, not much glass fiber left above the hole.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011191.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011191.jpg.html)

With that done I made an air deflector plate and welded it to the strengthening plate to get the ram air directed down into the engine air intake. Not the easiest piece to take a picture of but you get the idea.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011192.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011192.jpg.html)

And it fits like this, later I will fit a black coarse meshed net to improve the looks a bit.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011193.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011193.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Jon on June 28, 2013, 05:11:34 PM
Are you bell mouthing the intake at all Anders?
That's a big intake hole but looking at all your other work I'm sure you have worked out how big it needs to be, I have no turbine experience.
A course mesh will disrupt the airflow a fair bit though.

I'm impressed with the tidiness and simplicity of your build, I don't mean simple as in easy but how you have managed to make to keep each component as simple as possible. Obviously a lot of thought and planning.

I was concerned about the hose in a crash, I'm building a liner though so the likelihood of mine falling over is probably over 100%, a sit on bike less so.
I still would be trying to keep the hoses inside the frame, it could make the difference between cosmetic damage or end of the meet for a bit of a spill.

Cheers
jon


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on June 28, 2013, 09:19:53 PM
  Mesh will cut the airflow a bunch. Try holding a window screen out the door going down the road. Lots of resistance.
 Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 28, 2013, 11:23:02 PM
Are you bell mouthing the intake at all Anders?
That's a big intake hole but looking at all your other work I'm sure you have worked out how big it needs to be, I have no turbine experience.
A course mesh will disrupt the airflow a fair bit though.

I'm impressed with the tidiness and simplicity of your build, I don't mean simple as in easy but how you have managed to make to keep each component as simple as possible. Obviously a lot of thought and planning.

I was concerned about the hose in a crash, I'm building a liner though so the likelihood of mine falling over is probably over 100%, a sit on bike less so.
I still would be trying to keep the hoses inside the frame, it could make the difference between cosmetic damage or end of the meet for a bit of a spill.

Cheers
jon

Hi Jon,

No bellmouthing at all since the idea is to force ram air into the engine at speed, the hole in the fairing is partly cosmetic since much air will pass through the space between the fender and fairing as well. Not very much calulations here I must admit, Iīll do some test runs and measure the pressure/underpressure in front of the compressor wheel to see if the air intake is restrictive or not.

You and Doug are right about the mesh cutting airflow, Iīll try to find the coarsest one around and if the engine is starved on air (can easily be seen on the exhaust temp) Iīll remove it.

Every part I make for the bike I try hard to make as field serviceable as possible, going overseas is a huge project so I will have to bring spares for everything so I wonīt be left in the pits because of some small part breaking down. This brings a kind of simplicity to the bike that I like, the less parts it has the less likely it is to break down.  :-)

With the bike on its side the fairings will hit the ground before the hose does, and the foot pegs will add to that so I hope that it will be enough. Looking at it now I could have fitted the suction line at the front of the tank with a long pickup tube but the problem would still be there since the oil line still has to run outside the fuel tank.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 01, 2013, 03:23:19 PM
Today I solved the problem with fastening the front sprocket to the gearbox output shaft!  :lol:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011195.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011195.jpg.html)

My earlier idea was to hire a mechanical company to cut splines on the shaft and have a friend of mine to spark erode internal splines in a sprocket blank, both expensive and troublesome so I did a test today with an old hayabusa sprocket I had laying around. I opened up the centre hole in the lathe and milled a 10mm slot for the woodruff key.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011196.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011196.jpg.html)

This sprocket had lots of holes drilled in it but when I make the "real" one I will use an undrilled sprocket, with a spacer behind it I can align the front and rear sprocket perfectly and another spacer outside the sprocket locked in place with an M10 bolt in the threaded hole in the shaft will make everything rock solid. Since there will be a smooth, constant torque I cannot imagine that it wonīt be sturdy enough.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011197.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011197.jpg.html)

This was the only detail left unfabricated that I didnīt know how to make so this is a big step forward for the project, the best thing about it is that the gearbox shafts are left unmodified so if I need to change them for some reason I wonīt have to go though some expensive machining job again.

I have also recieved a front brake cylinder for a GSXR750 identical to the one I already have, this one fits upside down on the left handlebar and will maneuver the rear brake.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011198.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011198.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 02, 2013, 02:57:41 PM
I got the battery for the bike today! A 52Ah Deka Dominator deep cycle battery made for total loss systems so no cranking battery.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011199.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011199.jpg.html)

The lid for the fuel tank is also finished so as soon as I can I will start figuring out where to place the tank connections.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011200.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011200.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on July 02, 2013, 04:45:17 PM
.
I have also recieved a front brake cylinder for a GSXR750 identical to the one I already have, this one fits upside down on the left handlebar and will maneuver the rear brake.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011198.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011198.jpg.html)

Cheers!
/Anders

That might be hard to bleed being upside down, couldn't you look for a rear master cylinder off a scooter

Ducati used a sprocket with a single key on a GTL 500 twin, they always break thru the keyway. It might be good to weld a band around it for that extra bit of strength

G


Title: Re: APS/Ω Gas turbine bike build
Post by: Jon on July 03, 2013, 02:46:56 AM
You can't buy a bossed sprocket the pitch, tooth count and shaft dimensions you need straight off the shelf Anders?

Pretty common thing in industrial applications and cheaper than you'd think.

jon


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 03, 2013, 05:17:15 AM
That might be hard to bleed being upside down, couldn't you look for a rear master cylinder off a scooter

Ducati used a sprocket with a single key on a GTL 500 twin, they always break thru the keyway. It might be good to weld a band around it for that extra bit of strength

G

The brake fluid container is connected to the cylinder through a hose so it can be fitted above the handlebar, if it was an integrated container it wouldnīt work very well since it would be hanging upside down.

Jon: Your idea about an industrial sprocket is very good, my gas turbine mentor in Australia suggested the same thing last night so I will look into where to source them. He has used one for his first turbine bike and only had to shave some tooth width away on the lathe for it to fit.

Before I order any sprockets I have to do some calcs on what gearing I need, my first goal is to reach 200mph in a standing mile so I will gear the bike for slightly over 200. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on July 03, 2013, 08:26:18 PM
Anders, one solution is to use as long a key as possible, to make a sleeve, broach a groove in the sleeve, and weld the sprocket to the sleeve.  This way you are distributing the shear load over as much area of the key as you can.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 03, 2013, 11:57:04 PM
That is another thing that would work, welding the sprocket is something Iīd rather not do if I have an option so Iīll try the industrial sprocket first.

Iīve fitted the filler neck, fuel return and the breather to the lid now, not welded yet though.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011201.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011201.jpg.html)

Inside the tank I will fit an extra wall to stop the fuel from sloshing around and the fuel pickup will be at the rear wall with a snout so the fuel will be taken 1/3 from the rear wall. This is because of the risk for a flame out if I brake the bike when the tank is close to empty, with the pickup closer to the centre of the tank the risk for this should be slightly less.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 04, 2013, 10:30:11 AM
Anders;

The reticulated open-pore foam used in fuel cells works well to keep fuel from sloshing around in a tank. Nice build!

Regards, Neil Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 04, 2013, 04:08:44 PM
Anders;

The reticulated open-pore foam used in fuel cells works well to keep fuel from sloshing around in a tank. Nice build!

Regards, Neil Tucson, AZ

Hi Neil,

Iīve thought about it but if I stuff the tank full of foam before I weld it shut the foam will probably be a melted blob of plastic at the bottom of the tank afterwards...  :-(

When my youngest girl had her daily lunch nap I got some minor stuff done on the fuel tank, first off I welded a length of aluminum tubing to an AN8 fitting and drilled a hole for it in the rear baffle.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011202.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011202.jpg.html)

I also fitted a sight glass to have a clear view of the fuel consumption, I will fill the tank between each run but still it would be interesting to see how much is left after the initial warmup of the engine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011203.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011203.jpg.html)

I barely managed to make a template for the tank baffle before my daughter woke up, next time I will cut it out in aluminum and weld it in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011204.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011204.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 04, 2013, 04:13:10 PM
Anders;

The foam is put in through the filler hole. You wad up the foam into a small ball and squeeze it in the fuel filler hole-- it expands when you release it inside the tank.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 05, 2013, 03:13:13 PM
Hi Neil,

Aha, I didnīt know that. My filler hole is only 4-5cm in diameter so it might be difficult to roll a ball that size, but it doesenīt matter now since I welded the internal baffle to the tank two hours ago.

I cut the suction tube end at an angle so it sucks fuel from the bottom to avoid vortexes forming when the fuel level is low (I couldnīt figure out a practical way to build a "hat" for it), with the baffle in place I started welding the tank together except for the lid which will be fitted last.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011205.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011205.jpg.html)

While waiting for the air cooled torch to cool down between the passes I fitted an old scrap chain to the sprockets to see how the clearance and alignment would be, just like I thought I will have to mill some material away from the rear gearbox mount to get enough clearance for the chain.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011206.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011206.jpg.html)

Since the "real" front sprocket will be several tooths larger I will have to take a fair bit of the mount edge away, no problems since it is overly beefy as it is. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011207.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011207.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 10, 2013, 03:28:59 PM
Last saturday night I decided I needed some workshop time with a couple of beers after the family had gone to bed, so I headed out to the shed and continued working on the fuel tank. :cheers:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011208.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011208.jpg.html)

A welder needs quality music! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011210.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011210.jpg.html)

The tank is cooling off after welding, the Argon bottle is almost empty so I need to get it filled before the next workshop pass.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011209.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011209.jpg.html)

The tank lid in place and lids placed on the fuel return and breather connections.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011211.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011211.jpg.html)

One of the rear tank mounts in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011212.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011212.jpg.html)

The other of the two rear mounts, sturdy enough I believe.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011216.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011216.jpg.html)

While waiting for the tank to cool down I made the last three braided fuel hoses for the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011213.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011213.jpg.html)

Here the tank is in place, it was almost 3 in the morning so making the front mounts had to wait for some other day.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011215.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011215.jpg.html)

A snake nest of hoses everywhere on the bike, I will have to figure out some fancy aluminum clamps later to arramge them a bit.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011214.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011214.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Captthundarr on July 10, 2013, 06:59:42 PM
Nice Anders  :cheers: I know some are glad to see the straps gone  :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 11, 2013, 01:03:41 AM
Nice Anders  :cheers: I know some are glad to see the straps gone  :-D

Thanks!  :-)

I guess so, I try hard to keep in mind that every single part on the bike must survive hours of bouncing around at high speed down bumpy tracks. It wouldnīt be very fun to drop and run over the oil tank at >200mph...... :-o


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 17, 2013, 07:27:16 AM
I have a question about the foot pegs, do they need to be foldable or can they be directly welded to the chassis?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 19, 2013, 04:23:49 AM
Last night I finally had time to get some stuff done on the bike again, Iīve been away at work for a week so the fingers were itching bad from being away from the tig welder and mill for so long. :)

I got a new gas lens kit for the tig torch which I intended to try out while finishing off the fuel tank mounts.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011218.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011218.jpg.html)

Two aluminum brackets were made to fit as the front mounts on the tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011217.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011217.jpg.html)

The patient is laying down and ready for surgery! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011219.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011219.jpg.html)

The gas lens was an improvement, not bad since it only cost me a couple of bucks on Ebay.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011220.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011220.jpg.html)

Here the mounts are in place and the tank is cooling down after welding.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011221.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011221.jpg.html)

While waiting for the tank to cool down I made a pair of steel brackets for the frame.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011222.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011222.jpg.html)

Fixing everything for welding, finally I will get rid of the last strap! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011223.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011223.jpg.html)

The tank in place, the only things left to do on the tanks are to weld some brackets to the side of the tanks that the oil suction hose will be strapped to and make a fitting on top of the oil tank for the gearbox oil drain.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011224.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011224.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on July 19, 2013, 01:16:57 PM
Great work Anders!  :cheers: I love all the lines. Makes it look like a rocket ship!

As far as your musical taste goes, I too rely on a little Sepultura to keep the build progressing!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 19, 2013, 03:17:28 PM
Thanks! I wouldīt want to sum up just how much cash that is invested in those Dodge AN couplings though, one here and a couple there and suddenly the wallet is empty... :-D

Workshop music for me is very much mood based, metal one day and Toy Dolls (brittish punk band) the next. Add some bluegrass and blues to the mix and you have one happy Anders. :-)

Iīll bump the previous question about the foot pegs, does anyone know if they have to be foldable or not?


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on July 19, 2013, 05:16:47 PM
I have fixed pegs on my Modified bike that I run at the BUB trials on the salt.  You may want to use temporary pegs with clamps until you KNOW when they should be after a test run.........or three :|


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on July 19, 2013, 05:48:27 PM
We switched to folding pegs for one of the associations regulations think it may be FIM , but had been fine with solid pegs for several yrs before that 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 19, 2013, 11:36:52 PM
Thanks for the answers, a good idea about the movable pegs so I can find the right riding position. Not easy to figure out by dry riding it in the workshop.


Title: Re: APS/Ω Gas turbine bike build
Post by: JimL on July 20, 2013, 08:46:50 AM
Sometimes a rigid peg is the easiest mount for a removeable sidestand in the staging lanes.  You will spend more time pushing slowly forward in the lanes, than you will riding.

Also, I have built bikes with even footpegs and others with goofy-foot pegs.  Goofy-foot can be easier to ride when the bike is super low.

Thank you for this build diary, I am really enjoying it.
JimL




Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 21, 2013, 04:49:07 PM
Thanks Jim, Iīll keep that in mind for when I build the pegs.

I made some progress today by the way, first I made some brackets for the battery mount and welded them in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011225.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011225.jpg.html)

I will think a bit more about the battery box before I do something stupid and canīt get the gearbox out of the frame any more, most likely a removable box properly heat shielded so the battery wonīt blow up from the heat generated by the exhaust.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011226.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011226.jpg.html)

Next up was to fit the wind screen so I can take measurements for the dashboard, I drilled a row of 2.5mm holes around the lower edge on the screen and matching 4mm holes in the fairing. The idea was to fit a zip tie through the windscreen hole, down through the 4mm hole in the fairing, around the aluminum rod you can see in the picture below and up again through the same 4mm hole.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011228.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011228.jpg.html)

This way I can tighten the zip tie hard without cracking the glass fiber fairing, some silicone around the gap between the windscreen and fairing later will do the trick.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011229.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011229.jpg.html)

Before I called it an evening I started making the chain adjusters, but Iīll get back to them in the next post after I have made some more progress.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011230.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011230.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: 38flattie on July 21, 2013, 04:59:58 PM
Ansers, this  build is sooo exciting, and it's coming along nicely! :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Dr Goggles on July 21, 2013, 08:31:11 PM
A welder needs quality music! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011210.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011210.jpg.html)

you guys don't get enough sunlight :roll:


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 22, 2013, 11:28:13 AM
Every one to his own taste but when I'm working in the shop I prefer some Tal Farlow on the stereo system.

http://www.youtube.com/watch?v=6SagCCeZXZo

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 22, 2013, 02:51:57 PM
Every one to his own taste but when I'm working in the shop I prefer some Tal Farlow on the stereo system.

http://www.youtube.com/watch?v=6SagCCeZXZo

Regards, Neil  Tucson, AZ

I must admit that Iīve had a period of listening to experimental jazz while I was hooked on High end audio, but I wouldnīt get much done in the workshop with that kind of music on the stereo. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 22, 2013, 04:25:35 PM
Well, there is always Thelonius Monk.  http://www.youtube.com/watch?v=OMmeNsmQaFw

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 24, 2013, 04:10:35 PM
I think Iīll stick to my thrash metal, but thanks for the link! :-)

Here are the pics from last nights work, I modified the rear axle blocks to hold an M8 bolt for chain adjustment.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011232.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011232.jpg.html)

A pair of steel plates were made to fit the frame and complete the adjuster, I will weld them fully later when the frame is stripped and back in the frame jig.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011233.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011233.jpg.html)

Another mini project is to make the battery box, I will continue with that next time I go to the workshop.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011234.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011234.jpg.html)

Finally I removed the masking tape from the windshield, apparently the tape can get stuck if it is left on too long and it did leave some marks that I will have to remove with some solvent that doesenīt damage the plastic windshield.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011235.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011235.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 24, 2013, 04:19:49 PM
Anders;

You are welcome to the thrash metal; it's not for me.

I have successfully removed old tape adhesive residue from Plexiglass with denatured alcohol. This is ethyl alcohol with a few little additives that make it unfit to drink. I've never tried methanol. That is a nice windshield!

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on July 24, 2013, 06:20:55 PM
natural oils remove the residue without any risk of damaging screens or paint  , locally we use eucalyptus oil , but when traveling could only find peppermint which also worked well
at a pinch crc also does the job


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on July 24, 2013, 06:56:09 PM
Well, there is always Thelonius Monk.  http://www.youtube.com/watch?v=OMmeNsmQaFw

Regards, Neil  Tucson, AZ

I find Monk not all that strange, but I do have difficultly listening to later Coltrane (post Miles)....too many repeated strange measures for my taste.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 25, 2013, 12:18:10 AM
Lots of blues and Kris Kristofferson as well so I am no pure metalhead, it sort of follows the mood.

Thanks for the advice about the tape removal, I will try on a corner of the screen first to see if it miscolours the plastic or not.


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on July 25, 2013, 05:32:45 AM
Here's a complete off-topic hijack -- but still might have some value for taking off adhesives:


We now and then use flypaper strips to catch the pests both at home, in sunny windows, and even at Bonneville.  A few years ago during the Shootout the flies were amazing -- many of 'em and they'd bite!  We had flystrips hanging from the rear view mirror in the truck.  But it was inevitable that I'd brush against the sticky strip when reaching for the phone or something - and the goo on the strip is dang near impossible to remove.  But then - I found some information online telling me that using vegetable oil - canola or peanut or one of those oils - - is a fine way to make the sticky goo let goo and come off the skin.  I'd even tried gasoline and strong soaps and scouring powders -- nope, they didn't.  The vegetable oil removes the adhesive (it's a resin) and isn't very noxious, either.

Will veggie oil work on the windscreen?  Maybe give it a try.  It should be pretty benign to the plastic.


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on July 25, 2013, 10:13:45 AM
I'm rolling on the floor :-D :-D :-D :-D :-D :-D :-D

Only a true U.P.-er would resort to flypaper.........the civilized parts of North America use toilet-paper and an occasional shower or bath to keep the flies away :wink:

And the next most obvious answer regarding veggie-oils will come from someone down under. :lol: :lol: :lol: 


Title: Re: APS/Ω Gas turbine bike build
Post by: hotrod on July 25, 2013, 02:59:00 PM
I have also used those spray cans of cooking oil (olive oil in my case) to soften the adhesive on old dried paper labels. Just spray it on let it soak for a while then peel or scrape off the label. A squirt of naptha lighter fluid also works well but on a plastic wind screen I would test that on some scrap first.

(I have picked up one of those electronic fly zapper swatters for this year ;)   )


Title: Re: APS/Ω Gas turbine bike build
Post by: MattGuzzetta on July 25, 2013, 11:15:22 PM
Great build, I have been watching since you started!  If you are having difficulty with the tape adhesive, I recommend Naptha if you can find it.  It is a solvent that is available at most paint stores and home improvement stores as well.  It is a natural solvent for most rubber type glues and does not affect most substrates.  Of course test it on a scrap, but I have been using it for some years and it is the cleanest method of removing tape residue or labels on plastic containers.
Good luck, can't wait to see how this project works! :-D

Matt Guzzetta
 


Title: Re: APS/Ω Gas turbine bike build
Post by: 38flattie on July 26, 2013, 08:00:47 AM
I find listening to blues is best for me-Muddy Waters, B.B. King, Robert Johnson, and of course, Eric Clapton and Stevie Ray Vaughn! :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 26, 2013, 12:10:26 PM
I find listening to blues is best for me-Muddy Waters, B.B. King, Robert Johnson, and of course, Eric Clapton and Stevie Ray Vaughn! :-D

Great taste! I listen a lot to Albert Collins and RL Burnside, and Neil Young has been played countless hours in the workshop. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: 38flattie on July 26, 2013, 05:19:31 PM
I knew you had to have some good taste, to build a bike this cool! LOL! :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on July 26, 2013, 08:10:01 PM
A brief further excursion into music for the shop - or house:  We're fortunate to have unlimited data allowance on our internet service - so we listen pretty much exclusively to internet radio stations.  Right now we're hearing SKY.FM -- a pretty good blues "station".  Aardvark blues isn't bad, either, but is a bit repetitive week in and week out.  For more "rock"-like music Atlantic Sound Factory is pretty good.

Classical is my favorite, and Classical Minnesota Public Radio wins in that category, with (sorta surprisingly) Wyoming Public radio coming a strong second.

Back to Anders' bike.  If we want to discuss music sources I guess I'll have to (or one of you should) start a music thread.  Keep it simple so Dan Warner doesn't curse us for straying so far from land speed racing, of course. :roll: :evil:


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 26, 2013, 08:12:21 PM
I find listening to blues is best for me-Muddy Waters, B.B. King, Robert Johnson, and of course, Eric Clapton and Stevie Ray Vaughn! :-D

Old country blues is my taste-- Big Bill Broonzy, Leadbelly, Blind Lemon Jefferson, Blind Blake, Sonny Terry & Brownie McGee, etc. Like in "country music" the earlier stuff appeals to me-- Hank Williams, Jimmy Rodgers, etc. Everyone's tastes are different. Then there is flamenco...

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: 38flattie on July 27, 2013, 06:02:52 AM
Neil, you definitely have good taste-very nice!

Well, except for the flamenco... :wink:


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 27, 2013, 10:20:31 AM
Flamenco is an acquired taste  :-)

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on July 28, 2013, 10:08:35 AM
Back many years ago, when Dad was the sales manager for Electro-Voice, he got lots of interesting music so he could show off the systems EV made.  We had a few records of - ready? - bullfight music.  Close to flamenco, sorta, but - ahh, unique.  I often wonder where those old records are now.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 07, 2013, 03:35:26 PM
After yet another vacation, now a 700km trip to a wedding, I am back home and eager as ever to get some more work done on the bike. Last night I ran to the workshop with a couple of beers to ease my vacation nerves a bit.  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011236.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011236.jpg.html)

The battery box was cut to shape and had side walls welded to it, then I welded a steel plate to the frame as the front box mount.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011237.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011237.jpg.html)

The rear battery box mounts.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011238.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011238.jpg.html)

And finally the battery box could be fitted to the frame! Like a gloooooove!  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011239.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011239.jpg.html)

The battery in place, there is enough space around it for some padding/heat shielding. I donīt want to cook the battery from the radiant heat coming from the exhaust...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011243.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011243.jpg.html)

The other project for the evening was to fit the gauges, a small dashboard was made for the P2, TOT, oil temp and oil pressure gauge.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011240.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011240.jpg.html)

Gauges in place!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011241.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011241.jpg.html)

And after welding a bracket to the frame it fitted this nicely under the wind screen, except for these gauges I will have a tachometer that measures the power turbine RPM from a probe on the front sprocket. That way I can see if there is any tire slip and how close to max revs the Allison C20 wheel is without having to calculate it from the GPS speed. The tachometer will be placed above the air intake along with the assortment of buttons and whatnot.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011242.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011242.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on August 07, 2013, 05:24:29 PM
P2  & TOT? Is this turbinespeak?  Nancy's dashboard had a note on it (from Stainless and Johnboy).  It read T O T, but the meaning was to help her get down further for a better tuck.  You're welcome to spend a few seconds figuring it out.


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on August 07, 2013, 05:39:51 PM
I'm no expert at abbreviations, but I'm guessing it had something to do with the fuel tank.  :evil:


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on August 07, 2013, 05:41:53 PM
And the bike is looking great Anders!  :cheers: The quality of the work is outstanding! Hope to one day see it whistling down the salt.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on August 07, 2013, 05:58:38 PM
P2  & TOT? Is this turbinespeak?  Nancy's dashboard had a note on it (from Stainless and Johnboy).  It read T O T, but the meaning was to help her get down further for a better tuck.  You're welcome to spend a few seconds figuring it out.

.... on thighs?


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on August 07, 2013, 06:12:25 PM
Close.

"...on tank" :evil: :evil:  Didn't help much, I'm happy to report. :roll:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 08, 2013, 12:05:16 AM
Ahh, sorry about that! It never crossed my mind that there are people out there unfamiliar to gas turbine nomenclature. :-D

The different pressures in a gas turbine engine are numbered by the way they appear from the intake to the exhaust, P1 (pressure 1) is the pressure before the compressor stage, P2 is pressure after the compressor stage etc etc. P2 is in other words "boost pressure" in automotive terms.

TOT means Turbine Outlet Temperature, the temp before the turbine wheel is TIT. To complicate things even further I could name it ITT (Inter Turbine Temperature) now that I have a power turbine stage added to the engine. :-)

Thanks Lsrjunkie! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 08, 2013, 04:45:30 PM
After seeing my friends gas turbine sportbike on the road for the first time I just HAVE to try my bike before the winter arrives! I will up the pace if possible and cut some corners to save time, the rest can be done during the winter. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011247.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011247.jpg.html)

I removed the power turbine section to finish some stuff left undone earlier, I also think I will skip the dry sump and directed oil jets for now and fit them later. I cannot imagine that the bearings will suffer any damage from a short low speed run with oil in the gearbox.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011245.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011245.jpg.html)

A graphite seal will be fitted in front of the first shaft bearing to keep heat from the bearing and oil from pouring into the turbine housing, in the pic I am removing the turbine wheel shaft spacer to access the space where the seal will be.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011246.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011246.jpg.html)

After that I started doing what I had planned for the evening, to align the rear wheel and make spacers for the rear axle.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011248.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011248.jpg.html)

The right side spacer being arbored in the mill.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011249.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011249.jpg.html)

And here it is in place, I found a suitable piece of aluminum for the left side spacer but called it a night since I was kind of tired.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011250.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011250.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Captthundarr on August 08, 2013, 05:44:12 PM
Said it before and will say it again. Cool build and learning a lot. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 09, 2013, 06:16:47 AM
Thanks, always nice to learn new stuff. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Captthundarr on August 09, 2013, 10:21:15 AM
 Yep, good to learn. I have been wanting to propel something with a gas turbine for a coulple of years. Following your build has given me some ideas.Can't wait to see a video of this bike under power.

Frank.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 12, 2013, 02:54:40 PM
Get to it, turbines are tons of fun! :-)

To sort things out a bit I wrote down all the different things that needs to be done before the bike is ready to run, it might look a lot but mostly they are minor jobs that can be done 2-3 of each workshop pass. Sorry for the crappy language. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011252.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011252.jpg.html)

After that I made the last wheel spacer so now the rear wheel is aligned and freely spinning.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011253.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011253.jpg.html)

Everything in place!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011254.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011254.jpg.html)

That was a couple of days ago, today I found an hour after the kids went to sleep and started working on the gearbox. I needed to make 6 M8 threaded holes so I could bolt the freepower housing and gearbox together. If I hadnīt drilled some of the freepower housing holes slightly wrong 6 months ago I could have done just that, now I need to grind them a bit for all six bolts to fit.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011256.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011256.jpg.html)

Threading the shaft tunnel, cast iron is a bit strange to work with since it doesenīt produce swarfs like ordinary steel but rather dust...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011257.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011257.jpg.html)

After that I made the cover for the shaft bearing right behind the power turbine wheel, first I thought about making it in graphite but since I donīt know if it might send particles into the bearing and possibly wreck it I chose to make it in steel instead. Here I am threading the hole for the stop screw.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011258.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011258.jpg.html)

Here we have the cover (there must be a more correct name for it) and the stop screw before they were fitted.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011259.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011259.jpg.html)

And here they are in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011260.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011260.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 13, 2013, 02:31:32 PM
During my little girls day sleep I fixed the faulty power turbine housing holes in the mill to get all 6 M8 bolts to fit.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011262.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011262.jpg.html)

Later this night when the Dodge russian athletics was all over the tv I headed out to the shed to make some minor adjustments to the power turbine housing to get a decent fit for the exhaust.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011263.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011263.jpg.html)

After that I welded the previously spot welded exhaust...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011264.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011264.jpg.html)

...and assembled the shaft tunnel, turbine housing and exhaust!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011266.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011266.jpg.html)

As a side note Iīve bought a WP9 tig torch which is much smaller than the old WP27 that came with the tig welder, it is a dream to weld with and you can see the difference in size in the pic below.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011265.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011265.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on August 14, 2013, 12:25:09 AM
Anders, make sure someone takes a little video of that first run for u-tube.  That is quite the project.  It looks good. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 14, 2013, 02:32:39 AM
Anders, make sure someone takes a little video of that first run for u-tube.  That is quite the project.  It looks good. 

Thanks! Rest assured that everything will be captured on video and put on youtube.


Title: Re: APS/Ω Gas turbine bike build
Post by: DND on August 14, 2013, 07:43:03 AM
Hi Anders

They used to make a little cap for the collet instead of that short tapered one on the small torch handle, maybe they still do?

It did not stick up any higher than the back of the handle, for getting down into holes etc

Looking good, G Don


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 14, 2013, 10:51:19 AM
Hi Anders

They used to make a little cap for the collet instead of that short tapered one on the small torch handle, maybe they still do?

It did not stick up any higher than the back of the handle, for getting down into holes etc

Looking good, G Don

I have one of those, they are great for welding inside pipes etc but for regular welding I prefer the longer caps since they can house longer electrodes.

Thanks!


Title: Re: APS/Ω Gas turbine bike build
Post by: DND on August 14, 2013, 02:51:26 PM
I hear ya, the way I used to ' Dip The Wick ' I had them lined up like cordwood in a little wood block

G Don


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 14, 2013, 03:55:25 PM
After 10 years of practice it can actually take some time before I need to resharpen the electrode, unless I skip cleaning up the metal before I start welding of course... :-)

More russian athletics on the TV = a trip out to the workshop. This time I finished two of the smaller jobs on the list in less than an hour.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011269.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011269.jpg.html)

Fitting a temp probe to the inter turbine duct, it was fitted on the bottom so it wouldnīt be in the way for the heat shielding jacket I will make for the power turbine section later.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011270.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011270.jpg.html)

Here you can see the probe inside the duct.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011271.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011271.jpg.html)

After that I placed the entire power turbine section on the workbench, it has become quite a large piece. Heavy as well thanks to the cast iron gearbox, lucky for me that weight isnīt an issue in landspeed racing. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011272.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011272.jpg.html)

The other minor job was to shorten the handlebars a bit, as you might have noticed they were longer than needed and now was the perfect time to fix that.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011273.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011273.jpg.html)

This looks a bit better, now I only have to order a pair of shorter brake levers to complete the new look. Does anyone know just how serious the rule about a 1/2" (if I remember correct) ball at the end of the handlebar levers is? Can I use those short and fancy Ebay levers with a hollow cylinder type of ball at the end instead or does it for some obscure reason have to be exactly a 1/2" perfectly round ball?

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011274.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011274.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on August 15, 2013, 12:27:50 AM
Anders, "shorty" dirt bike control levers work great.  You can get them at places that sell motocross bikes.  Get the more expensive pro grade forged ones.  They bend rather than fracture when you hit the deck.  The cheap cast ones break.   


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on August 15, 2013, 09:51:16 AM
"More russian athletics on the TV = a trip out to the workshop."

It sounds like Sweden's TV hasn't changed much since I was in Stockholm quite a few years ago-- the only thing on TV then was a re-run of "Sanford and Son". I mentioned this to a friend and he said "if you think this is bad, take a look at Norwegian TV!"  :roll:

Regards, Neil   Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 16, 2013, 02:40:14 AM
Anders, "shorty" dirt bike control levers work great.  You can get them at places that sell motocross bikes.  Get the more expensive pro grade forged ones.  They bend rather than fracture when you hit the deck.  The cheap cast ones break.   

Great news! The ones I am interested in are cnc milled from 6061 T6 aluminum so they should be ok.

"More russian athletics on the TV = a trip out to the workshop."

It sounds like Sweden's TV hasn't changed much since I was in Stockholm quite a few years ago-- the only thing on TV then was a re-run of "Sanford and Son". I mentioned this to a friend and he said "if you think this is bad, take a look at Norwegian TV!"  :roll:

Regards, Neil   Tucson, AZ

On the Swedish channels it is mostly news and brittish criminal dramas, I very rarely watch tv so I canīt say for sure if it is better or worse now than for 10 years ago. Otherwise it is mostly crappy american series like Friends and 2 1/2 men people look at...

Last night started off by making a quick release mount for the air intake.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011275.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011275.jpg.html)

After that I cleaned up the work bench, spit in my hands and removed everything from the air intake in order to take it out of the frame.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011276.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011276.jpg.html)

It became quite a pile on my newly cleaned up bench.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011277.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011277.jpg.html)

With the air intake out of the frame I could do the two things on the list that concerned it, the heftiest one was to weld it so that was what I did first.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011280.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011280.jpg.html)

After a while it looked like this, a bit more rigid now I assume. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011283.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011283.jpg.html)

The second and last job on the air intake was to add an underpressure gauge to it so I can see if the engine is starved of air at higher revs, without that gauge I have no idea if I should blame an undersized powerturbine NGV or the intake in case the exhaust temps go through the roof during the test run.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011281.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011281.jpg.html)

Ready to be welded to the air intake.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011282.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011282.jpg.html)

And here it is in place right next to the oil regulator and perfectly visible for the rider.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011284.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011284.jpg.html)

Finally a pic with the gauge added.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011285.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011285.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on August 16, 2013, 03:22:58 PM
Is that a sleeved or unsleeved butt weld on the top tube 4'' back from the steering head?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 16, 2013, 04:32:46 PM
Unsleeved, is that a problem?


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on August 16, 2013, 05:33:32 PM
It would be much better sleeved, Anders. A sleeve inside or, better- outside, with angled or fish-mouth cut ends will give you far more strength than a simple butt weld. If you can put two holes in the sleeve and also do rosette welds, so much the better.

Angled or fish-mouth cut ends distribute the tensile stress over a longer length than a straight cut end. This is better for fatigue resistance.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 17, 2013, 01:57:03 AM
An inside sleeve would be easiest but I donīt want to cut the frame so I have to fit an external sleeve instead. The air intake mounts sort of restricts the length of the sleeve in one direction but I guess even a short one is better than no one at all.

Will do it during the winter when I finish welding the frame, thanks for suggesting it. I wouldnīt want a weld around the steering head to crack during a run...


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on August 17, 2013, 11:16:41 PM
That weld is in a place where it will get a lot of stress.  The method I use is a bit different.  Circumferential welds bother me a lot so I avoid them on the outer sleeve, too.  The outer sleeve is a saddle that covers 1/2 to 3/4 of the tube.  A fracture in the circumferential weld needs to travel around the edge of the saddle before the tube breaks.  This is something I almost always see in time to make a repair.  I am tired now and will send a picture tomorrow.     


Title: Re: APS/Ω Gas turbine bike build
Post by: Grandpa Jones on August 18, 2013, 12:03:20 AM
Hi Anders,

In the USA, the FAA publishes a manual called:

AC 43.13, Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair

http://www.faa.gov/regulations_policies/advisory_circulars/index.cfm/go/document.information/documentID/99861 (http://www.faa.gov/regulations_policies/advisory_circulars/index.cfm/go/document.information/documentID/99861)

Check Chapter 4, starting at page 67. Some good info there on welded tubing repairs. In fact, that
book is a wealth of info for us garage fabricators. It is kind of a throwback book, covering a lot of
"old-school" aircraft repair, but still a solid resource.

I'm enjoying your build, looking forward to seeing it run.

Cheers, Dave


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on August 18, 2013, 11:31:59 AM
That weld is in a place where it will get a lot of stress.  The method I use is a bit different.  Circumferential welds bother me a lot so I avoid them on the outer sleeve, too.  The outer sleeve is a saddle that covers 1/2 to 3/4 of the tube.  A fracture in the circumferential weld needs to travel around the edge of the saddle before the tube breaks.  This is something I almost always see in time to make a repair.  I am tired now and will send a picture tomorrow.     

I agree with your comments about circumferential welds; that's why I recommended angle-cut ends or fish mouth ends on the outer sleeve.

Regards, Neil


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on August 18, 2013, 12:19:51 PM
Neil is correct about this. 

Highway bridges and other structures take a real beating and modern trucks carry a lot more weight than the truck loads used in those old designs.  Fatigue cracks at butt welds happen.  Most of the time the metal alongside the bead cracks and the weld does not.  Sometimes on round members we would slide a sleeve over the tube near the fracture, butt weld the fracture as best as we could, slide the sleeve down over the weld, and weld the circumference of the sleeve ends to the old tube.  Eventually the old tube would crack at the edge of a circumferential weld where sleeve was attached.  More about this later.

I-beams and W-beams crack too.  Sometimes at butt welds and often in the middle of the beam where it is heavily loaded and there are no welds.  We can't take the bridge apart to replace the beam in most cases.  We jack the beam up so it is sorta straight and butt weld the crack.  Then we weld fish plates across the butt weld where we can.  The plates add strength.  Also, the fracture path needs to make a bunch of 90 degree bends before the member breaks in half.  This is like Neil's fish mouth.  Fractures do not like to turn corners.

The swingarm in the photo is lengthened 3 inches by adding a section.  There might be a sleeve inside.  I do not remember.  Fish plates are welded on on both sides.  The fracture path is very long when this is done.  Also, a fracture would need to make eight 90 degree bends before the arm broke.  A joint with fish plates will not fracture to begin with is my experience. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 19, 2013, 04:01:33 PM
Thank you very much guys for the insight in this, I will get back to this during the winter when I strip the frame for the final welding and will make sure you think the sleeves look ok before I paint the frame.

I will read that paper you linked to Dave, and thanks for the praise! :-)

Thanks to some internet access problems I havenīt been able to post this until now, I got this done two days ago.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011286.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011286.jpg.html)

The suction line from the oil tank to the pump needed to be secured somehow, and I came up with these little buggers.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011287.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011287.jpg.html)

The oil tank ready to go, only the fuel tank left.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011288.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011288.jpg.html)

I am not sure if cable ties are the fastener of choice of you ask the safety crew at Speed Week so I will wire lock it later.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011289.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011289.jpg.html)

For this test Iīve decided to use the wooden seat to save some manifacturing time, I donīt want to rush that build since I really want the seat to be both comfortable and decent looking.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011290.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011290.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 20, 2013, 01:05:23 PM
I made a trip into town today and bought a bag full of couplings and a hydraulic hose so I could hook the air starter and propane preheat up with quick release couplings, this way it will be very easy to disconnect the bike from the starting gear once the engine is up and running.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011291.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011291.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 22, 2013, 11:52:59 AM
Last night I built the rear brake caliper "rod" or what it is called, the brake torsion restrainer perhaps? :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011292.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011292.jpg.html)

I donīt dare to ride the bike without a rear brake since I have no idea how high the idle torque will be, not fun if the rear wheel starts eating itself into the gravel road outside my house...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011293.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011293.jpg.html)

The rod is made out of chromemoly tubing so even if it looks a bit thin it is more than strong enough.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011294.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011294.jpg.html)

After that I started to fit all the stuff I removed earlier from the frame, this time with locking nuts and bolts that arenīt twice the lenght needed...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011295.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011295.jpg.html)

The other side.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011296.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011296.jpg.html)

Today I found an hour while the little girl was sleeping and assembled the gearbox with the set of SKF bearings with C3 play I ordered a week ago, later I will fit cheramic hybrids to cope with the revs but according to my jet mentor and friend John Wallis these ones should be ok as long as I keep the revs below 10.000rpm.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011297.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011297.jpg.html)

Fitting the bearings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011298.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011298.jpg.html)

The bearings and the gland in place, a snug but still loose enough fit against the shaft so it shouldnīt leak much exhaust gasses into the bearings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011299.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011299.jpg.html)

6 bolts cut to lenght and drilled for locking thread, they will be used to bolt the freepower housing and shaft tunnel together.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011300.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011300.jpg.html)

Bolts torqued down and lock wiring almost done!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011302.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011302.jpg.html)

No advanced lock wiring, just to make sure the bolts wonīt come completely lose.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011303.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011303.jpg.html)

With that done I could fit the turbine wheel and thread lock the bolt, I wouldnīt want to drop the turbine wheel at 33.000rpm...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011304.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011304.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on August 22, 2013, 11:59:15 AM
Anders;

A beautiful job!

In the second photo the open end of a round frame tube is visible. It would be better to weld a cap on to close the end of the tubing wherever possible. It not only keeps the salt out but it increases the stiffness and strength of the tube where other tubes intersect closely.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 22, 2013, 12:27:33 PM
Anders;

A beautiful job!

In the second photo the open end of a round frame tube is visible. It would be better to weld a cap on to close the end of the tubing wherever possible. It not only keeps the salt out but it increases the stiffness and strength of the tube where other tubes intersect closely.

Regards, Neil  Tucson, AZ

I have planned to do that later when I have the frame back in the jig to finish welding it up, but thanks anyway for pointing it out. There is lots I donīt know about frame construction (sleeving butt welds for example) so keep the hints coming! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 23, 2013, 01:05:34 PM
The weather was fine today so I decided to take the bike outside to take some pics, but first I had to fit the gearbox. To do that I had to mill away some material from the rear gearbox mount to make room for the brake caliper mount that was a bit in the way.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011324.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011324.jpg.html)

Plenty of room! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011326.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011326.jpg.html)

It wasnīt very easy to get the bike outdoors, I had to use all of the scrap wood laying around to get enough clearance for the tanks so they wouldnīt hit the doorway.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011327.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011327.jpg.html)

Here is a bunch of pics, no need to comment them so Iīll keep quiet. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011318.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011318.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011314.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011314.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011321.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011321.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011311.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011311.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011310.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011310.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011309.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011309.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011306.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011306.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on August 23, 2013, 01:10:12 PM
Anders, I can hardly wait to see you run this jewel!

Regards, Neil   Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 23, 2013, 04:13:03 PM
Thank you Neil, I am very close now to the first test run. Mostly some wiring and brake hoses left to do and then a check of the fuel and oil control.


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on August 26, 2013, 03:12:30 PM
I've said it before, and I'll say it again... This thing is amazing!! Anders, you are doing a great job!  :cheers:

Looks fast just sitting there!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 26, 2013, 03:57:51 PM
I've said it before, and I'll say it again... This thing is amazing!! Anders, you are doing a great job!  :cheers:

Looks fast just sitting there!

Thank you very much!

I start to feel a little nervous about the first run, I really have no idea what to expect since this is the first time I run a turboshaft engine. Pure jet engines I am used to but with this one the energy release is put to good use instead of just making noice. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 27, 2013, 04:02:03 PM
Some days are just better than others, today I could write off two of the larger things on my to-do-list without any effort at all!  8-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011329.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011329.jpg.html)

I took the bike into town to a company that could make steel braided brake hoses, a couple of hours later I returned home with a bag of hoses and no idea what they would charge me for it.  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011330.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011330.jpg.html)

Later tonight a blog reader dropped by with a set of five industrial sprockets ranging from 18-22 teeths, not only did he order the blanks for me but he drilled, reamed and made the key slot in all five for me! Needless to say we have the greatest blog followers on planet earth!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011331.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011331.jpg.html)

A perfect fit. All I need to do is to make some shims to get the right alignment with the rear sprocket and make a steel "hat" that fits on the drive shaft and locks the sprocket in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011332.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011332.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 28, 2013, 03:34:18 PM
While little Agnes took her lunch nap I decided to get the front sprocket aligned and locked in place, first I made a 7mm spacer ring that fits on the shaft inside the woodruff key.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011334.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011334.jpg.html)

With the sprockets aligned I started making a "cup" to fit over the drive shaft end and lock the front sprocket in place, it is a bit bulky but the alternative would be to modify the shaft and Iīve decided to keep as much as possible of the gearbox unmodified.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011335.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011335.jpg.html)

After some work in the lathe this piece fell out, what I havenīt done yet is to drill the edge and the bolt head for lock wire so the bolt can never come lose.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011336.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011336.jpg.html)

Two guys at the JATO jet forum reminded me of this, and today I made two steel spacers and welded them in place to keep the gearbox from being pulled backwards by the chain drive torque.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011333.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011333.jpg.html)

Tonight I dressed the freepower housing and the battery in heat blankets to keep the heat from both my feet and the battery.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011337.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011337.jpg.html)

Before I called it a night I finished fitting the brake lines and the brake fluid containers, next up is to fill the system.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011338.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011338.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: octane on August 29, 2013, 07:42:12 AM
Thank you Neil, I am very close now to the first test run.

No, no, no Anders. You're not running anywhere till you've finished welding:

(http://i207.photobucket.com/albums/bb220/octane98extra/JU-011332.jpg)

.-)


Seriously : I can only stand in awe.

Best of luck to you !

.


Title: Re: APS Ω Gas turbine bike build
Post by: octane on August 29, 2013, 08:04:25 AM

 is it ok if I take some random pics of the welds and send to the landspeed tech inspector?  

That's probably a good idea, but probably not just 'random'.
.-)

Please notice SCTA rule-book
SECTION 7 MOTORCYCLES 7.A.4

...it is strongly recommended that all new Special Construction class..
[snip]
..vehicles..[snip]..be submitted for pre-event inspection by the Technical Comitee.
If not practical because of distance, photographs and drawing may be
submitted to the Technical Committee Chairman...


I did just that with the Indian, to both the S.C.T.A. and BUB inspectors.
I send LOT's of photos and descriptions during the build process
( couldn't bear the thought of having it turned down after bringing it over )
and was meet with nothing but the friendly willingness to help me through the process.

There's another rule you must pay attention to:

7.J.13 Class Ω (Omega)
An engine using thermodynamic cycle other than Otto, Two Cycle or Diesel..[snip]..
..includes..
[snip]..turbine engines...[snip]..
..Entrant shall submit complete power plant details to the technical committee for safety evaluation
at least 45 days prior to the meet


.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 29, 2013, 01:31:35 PM
That spot is one of the few ones not welded all around, and it isnīt a critical weld for the frame strength either so I will take a gamble on this one. :-)

Thank you very much Lars, getting such praise from the real salt racers here is very flattering and assures me that I am heading in the right direction with the build. As Iīve said before I have no experience whatsoever from land racing except for the years of running jet sleds at our Swedish Speed Weekend on Ice which canīt really translate to a record attempt at the salt flats.

Pointing out the frame and engine is also appreciated, before I paint the frame I will go through it thoroughly and add sleeves on every butt joint and strenghtening plates at the steering head and other critical points.

The engine build is fully covered both with pics and data so I see no problem there, all rotating parts in the engine are off the shelf Garrett and Rolls Royce made so I shouldnīt have any problems getting that cleared either.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 31, 2013, 04:50:01 PM
Tonight I finished the temporary wiring for the upcoming tests, Iīve been tinkering with it a few hours last week but didnīt have much to show until now.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011342.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011342.jpg.html)

Main power switch, oil pump switch, scavenge pump switch, spring loaded spark ignition button and a relay controlled switch for the fuel pump coupled so that the pump only gets power if a pressure switch fitted to the oil filter housing feels that there is oil pressure in the system.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011339.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011339.jpg.html)

As an added safety I have put an extra fuel pump switch where it can be easily reached if something happens during the test run, as you might know the only way to turn off a gas turbine is to shut off the fuel flow.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011341.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011341.jpg.html)

All that is left to do now is to fill the fuel and oil tanks, test the pumps and look for leaks. After that I will do a couple of test starts to see if the exhaust temp is ok, if the power turbine NGV is too restrictive I will get high temps and need to open up the NGV area some to get the temps down to reasonable levels.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 01, 2013, 04:10:38 PM
Today I finished off the last stuff I had to do before I could test the system, first I made a fuel tank breather...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011346.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011346.jpg.html)

...and after that I made a fake injector with a 1mm hole to simulate fuel flow for the fuel pressure test.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011347.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011347.jpg.html)

An oil hose was routed from the oil filter output back to the tank so I didnīt have to run the oil through the engine to get a pressure reading.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011348.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011348.jpg.html)

The bike was filled with some Jet-A1...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011344.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011344.jpg.html)

...and some oil.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011343.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011343.jpg.html)

The test showed that the throttle regulator was too restrictive so I couldnīt get the idle fuel pressure low enough, I disconnected it and used a 30A PWM controller to run the pump instead. I got a perfect throttle response from 0 to 7 bar fuel pressure so I will use a PWM from now on.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011345.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011345.jpg.html)

I shot some video footage when I tested the pumps and stuff, sorry for not speaking english but I promise to take some time to make a complete presentation of the bike in english later when it is finished.

http://www.youtube.com/watch?v=uM_ovekOI_0

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 05, 2013, 02:19:45 PM
I will have to modify the internal oil lines a bit before I can run the bike, last night I tested the preheat and spooled the engine up to starting revs with full oil pressure and when I opened the engine cover drain almost 10cl of oil poured out. Yet another leakage in the Dodge banjo couplings for the journal bearings... :x

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011349.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011349.jpg.html)

Believe it or not but I am glad that it happened, because now I have a reason to tear the engine down and redesign the whole internal oil line arrangement. I could never torque the banjo bolts properly due to the assumed weak threads in the cast aluminum housing. Here is an old pic that shows what it looks like.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01448.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01448.jpg.html)

Another good thing is that I got a chance to find out if I could remove the gas producer from the frame without having to take away the gearbox or air intake first, it was tight but doable so now I know that field repairs can be done relatively easy.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011351.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011351.jpg.html)

While I removed the gas producer I filled the starting tank with the scuba compressor I inherited prematurely from my father, it wouldnīt hurt to overhaul the valves but I still got the tank up to 180bar which is close enough to the 200bar it is classified for.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011350.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011350.jpg.html)

After a short while the JU-01 was resting on the work bench, this will hopefully be the last time I have an oil leak inside it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011353.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011353.jpg.html)

I called it a night after I had removed the engine cover, I am looking forward to figure out how to do this.  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011354.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011354.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on September 05, 2013, 02:31:00 PM
Good info and history, your learning curve is well documented,thanks for sharing, :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on September 05, 2013, 05:56:37 PM
I will have to modify the internal oil lines a bit before I can run the bike, last night I tested the preheat and spooled the engine up to starting revs with full oil pressure and when I opened the engine cover drain almost 10cl of oil poured out. Yet another leakage in the Dodge banjo couplings for the journal bearings... :x

Believe it or not but I am glad that it happened, because now I have a reason to tear the engine down and redesign the whole internal oil line arrangement. I could never torque the banjo bolts properly due to the assumed weak threads in the cast aluminum housing. Here is an old pic that shows what it looks like.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01448.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01448.jpg.html)


Cheers!
/Anders

Perhaps the banjo fittings are compressing and the bolt is bottoming out in the hole before it is truly tight?
G


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on September 05, 2013, 08:21:11 PM
Anders;

Banjo fittings should have soft aluminum or copper washers on both sides; they seal when the bolt is torqued. The washers are one-time use-- throw them away after using. Without the soft sealing washers, banjo fittings are guaranteed to leak.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: charlie101 on September 06, 2013, 12:05:14 AM
When I was a mech. on a ship, I found those banjo fittings could develope a leak at any given time, even those that had been tight for years. I don't know why that happend on that damned boat.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 06, 2013, 12:47:58 AM
The banjo bolts are wire locked and have washers so it is all done properly, the problem is simply that I didnīt dare to tighten them as much as I should have since damaging the threads would have meant a complete rebuild like the one I am about to do now.

They have leaked after almost every assembly so I have had to remove the combustor and tighten them again, so it is something I need to fix since an internal oil leak is very dangerous. If the oil catches fire the engine will act like I fed it lots of fuel and starts revving up uncontrollably until the engine either destroys itself or runs out of oil to burn... :-o

It is called a "Runaway" since that is what you normally do when it happens. Iīve experienced a few over the years. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: gidge348 on September 06, 2013, 03:54:11 AM
If the oil catches fire the engine will act like I fed it lots of fuel and starts revving up uncontrollably until the engine either destroys itself or runs out of oil to burn... :-o

It is called a "Runaway" since that is what you normally do when it happens. Iīve experienced a few over the years. :-)

You are not the only one to have oil fire runaways, a Qantas A380 had one and it made a pretty expensive mess.. :| :|

http://www.youtube.com/watch?v=SO7aIqxXjAo

Ian... :| :|


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 06, 2013, 06:16:25 AM
You are not the only one to have oil fire runaways, a Qantas A380 had one and it made a pretty expensive mess.. :| :|

http://www.youtube.com/watch?v=SO7aIqxXjAo

Ian... :| :|

I suppose I am lucky to be on the ground if something like that happens, easier to abandon ship then than 10.000m up in the sky... :-)

I tore down the gas producer a couple of hours ago and found the banjo couplings without any sign of oil leaks, the compressor housing on the other hand was soaked in oil which I also found the reason for.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011355.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011355.jpg.html)

The time I ran the engine and the compressor nut came off and caused a rotor salad I didnīt notice that the piston ring seal on the spacer behind the compressor wheel got damaged, later I changed the seal but apparently I didnīt pay much notice to the aluminum sealing surface in the diffusor housing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011356.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011356.jpg.html)

I need to remove the damaged section in the lathe and make a steel bushing that can be pressed in place and act as the piston sealing surface. I will still redesign the oil lines since they sooner or later will give me trouble again, so when I am finished with the engine everything in the construction I have come to regret during the bench testing will be redesigned and hopefully wonīt give me trouble again.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Ellwood on September 08, 2013, 03:29:39 PM
Hi Anders,i was just thinking ,with all your electrics,  one thing regarding ON switches, or fuses, or deadmans switches- if you have two in parallell, then it reduces the chances of not getting a run because of a faulty one by like maybe 50 %. Unless Murphys law kicks in , and both switches break at the same time ???


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 09, 2013, 02:06:37 PM
I think Iīll take my chances, there is no engine vibrations that can mess things up so I find it extremely unlikely that a switch would break during a run. The bike will probably be covered in wiring, switches and gauges anyway so I donīt need to double the trouble. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on September 09, 2013, 11:03:49 PM
Anders, I spend a lot of time making shrouding to enclose the wheel areas so the salt stays there and out of the main part of the bike with the electrics.  Sheet aluminum and duct tape with baling wire reinforcement is used.  There is a little hole in the duct tape wall for the chain to pass through.  It works.  Seven years of racing the same bike and absolutely no corrosion on the electric terminals.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 11, 2013, 12:08:17 PM
Anders, I spend a lot of time making shrouding to enclose the wheel areas so the salt stays there and out of the main part of the bike with the electrics.  Sheet aluminum and duct tape with baling wire reinforcement is used.  There is a little hole in the duct tape wall for the chain to pass through.  It works.  Seven years of racing the same bike and absolutely no corrosion on the electric terminals.

That sounds like the way to do it, the front wheel needs to be covered so that not a single grain of salt can get ingested by the engine. Having both wheels enclosed like that would save me hours of cleaning up not to mention a lack of electrical corrosion.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 11, 2013, 02:33:41 PM
Last night I started modifying the shaft tunnel, first I cleaned off the remaining cheramic coating from the internal surfaces. As you might remember I coated them to lessen the heat soak from the glowing combustor but most of it came off during the first test run, most likely because of a lazy coater who didnīt prepare the surfaces enough... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011357.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011357.jpg.html)

It took a while to figure out how to clamp down the shaft tunnel properly, I really didnīt want it to move during the milling since that would bring mayhem and destruction to my dear shaft tunnel. After making a journal bearing dummy I could fit it like this on the rotary table.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011358.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011358.jpg.html)

A couple of hours of milling, measuring, thinking and more milling I had come this far. A 30mm wide slot where an aluminum rod will fit, an internal oil channel will be drilled through one end of the rod and oil exit holes drilled that matches the existing holes in the shaft tunnel that feeds the journal bearings. Anyone who understood that?  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011360.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011360.jpg.html)

Test fitting the aluminum rod, Iīll make the O-ring grooves in this piece since I canīt afford to make a mistake with the shaft tunnel.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011361.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011361.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 14, 2013, 12:02:46 AM
A couple of days ago I found some workshop time and finished the shaft tunnel modifications.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011363.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011363.jpg.html)

Next up is to make the piece with all the oil channels drilled in it, hopefully I can do it in a couple of days. Fixing the last house projects before snow falls have higher priority right now... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011364.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011364.jpg.html)

The drive chain has also arrived.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011362.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011362.jpg.html)

A quick test fit confirmed what I already knew, the rear gearbox mount needs to me modified for chain clearance. A test drive this fall feels far away right now... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011365.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011365.jpg.html)

This isnīt even the largest front sprocket so Iīll have to remove a fair bit of material, perhaps even add a nylon strip in case the chain still can get close to the mount.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011366.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011366.jpg.html)

The new ignition has also arrived, even at 3V it packs a mighty punch.

http://www.youtube.com/watch?v=kAd8fZD_ky8

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: bucketlist on September 14, 2013, 05:57:48 PM
In that picture with the chain box, lower left corner. That looks like a handy tool screwed to the bench for some often repeated task. Nifty idea.


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on September 15, 2013, 04:13:16 AM
I think Iīll take my chances, there is no engine vibrations that can mess things up so I find it extremely unlikely that a switch would break during a run. The bike will probably be covered in wiring, switches and gauges anyway so I donīt need to double the trouble. :-)

So many switches and wires
we have two switches and one light
on switch, starter button, red light
If the red light comes on, turn the switch off and turn right
If there is smoke in the cabin, pull the chute and aim to get out as soon as it stops
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 15, 2013, 10:01:20 AM
In that picture with the chain box, lower left corner. That looks like a handy tool screwed to the bench for some often repeated task. Nifty idea.

Very handy indeed, its purpose is to lock the turbine wheel hub while torquing/removing the compressor nut. This way I can use a T handle to avoid bending the shaft while torquing down the comp nut.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 15, 2013, 11:06:31 PM
Yesterday I had some time to work on the engine while the family was away, and I managed to squeeze in a couple of hours before I went to bed as well.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011367.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011367.jpg.html)

The oil distributor was fitted to the shaft tunnel to get its ends trued in the lathe, they need to be perfectly in line with the shaft tunnel sides.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011368.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011368.jpg.html)

After that I drilled the mail oil channel that connects the two journal bearings and the thrust bearing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011370.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011370.jpg.html)

After drilling the journal bearing feed holes the distributor block looked like this.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011371.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011371.jpg.html)

Here it is fitted to the shaft tunnel, the hole in the end feeds oil to the thrust bearing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011372.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011372.jpg.html)

The oil needs to get in to the distributor block somehow, so I drilled a hole in the side and gave it 1/2" UNF threads. A steel rod was threaded and will have a steel oil line welded to it. I had to make a custom die holder first since I didnīt have anyone that fitted the 1/2"UNF die.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011373.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011373.jpg.html)

Here it is partially fitted to the oil distributor block.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011374.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011374.jpg.html)

To make the distributor block a bit less ugly I took the corners away in the lathe so its radius would follow the shaft tunnel.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011375.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011375.jpg.html)

And here is the result, the only thing left to do with this part is to drill the bolt heads for lock wire and cut O-ring grooves for the three oil holes. I have ordered a bag of silicon O-rings so as soon as they arrive I can try to figure out how to make a tool to cut the grooves with.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011376.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011376.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 15, 2013, 11:16:49 PM
So many switches and wires
we have two switches and one light
on switch, starter button, red light
If the red light comes on, turn the switch off and turn right
If there is smoke in the cabin, pull the chute and aim to get out as soon as it stops
G

It is because both the fuel pump and the three oil pumps are powered by the battery, if they were powered by a belt like on a car I could probably remove 3/4 of the wiring. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on September 16, 2013, 04:31:48 PM

It is because both the fuel pump and the three oil pumps are powered by the battery, if they were powered by a belt like on a car I could probably remove 3/4 of the wiring. :-)

I'm not sure they make a belt that will deal with the RPM , or pumps
As long as the deadman switch turns the fuel off and you can also turn the fuel off without taking your hands off the handle bars
G


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on September 16, 2013, 11:14:42 PM
An o-ring groove tool.  I just noticed the end is not square.  You want it to be if you make one.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 18, 2013, 02:15:20 PM
Unfortunately the grooves I am about to make is around a hole drilled on a flat surface, so a tool like that one wouldnīt work. I have figured out how to do it without having to make a special tool, Iīll show you as soon as I have done it.

New brake discs arrived today, the old ones looks more like a pair of wave washers... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011377.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011377.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 21, 2013, 12:10:30 PM
This weekend the rest of the family are away, so I have three whole days for myself. A strange feeling for someone with small kids, I spent the whole day in the workshop and got a fair bit of work done.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011378.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011378.jpg.html)

I made the oil pressure tube that goes through the compressor housing and an AN6 fitting that is threaded to fit the tube.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011379.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011379.jpg.html)

A bit more work on the mill and lathe and the oil pressure tube is ready to have the internal oil line welded to it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011380.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011380.jpg.html)

Everything set for tig welding!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011381.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011381.jpg.html)

The oil line is cooling down after welding.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011382.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011382.jpg.html)

With that done I milled O-ring seats in the distribution block, the silicone rings were bought on Ebay for 1/20 of what a local dealer would charge me...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011384.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011384.jpg.html)

The insex heads were drilled for lock wire, donīt want them to come loose and drop into the turbine wheel.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011385.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011385.jpg.html)

Now it was time to fix the oil leak in the compressor housing, a piston ring seal on the turbine shaft is meant to hold the oil inside the shaft tunnel but during the mishap last winter when the compressor wheel came loose the piston ring sealing surface in the aluminum housing was damaged and started to leak oil.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011386.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011386.jpg.html)

I made a bushing in stainless that the rings will seal against, another benefit with this is that I could make it long enough for both piston rings. Earlier I could only use one ring due to space restraints.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011387.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011387.jpg.html)

I opened up the hole in the compressor housing so the stainless bushing could be pressed in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011388.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011388.jpg.html)

To make sure it wouldnīt spin or drop out I milled two recesses in the compressor housing and grinded two slots in the stainless bushing, a pair of punch marks locked it firmly in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011391.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011391.jpg.html)

Like this.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011392.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011392.jpg.html)

The oil hole for the thrust bearing was then drilled, very important that it is perfectly centered against the O-ring to avoid oil leaks.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011393.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011393.jpg.html)

Finally I could start to assemble the engine again, you can see a plug fitted where the old banjo oil fitting used to be.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011383.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011383.jpg.html)

Bearings and oil scavenge line fitted, by now I was pretty hungry so I called it a night and went inside to try to find me something to eat.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011394.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011394.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: peterdallan on September 21, 2013, 01:13:16 PM
Great build, cannot wait to see this all done and started up.

Exceptional workmanship

Peter


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 21, 2013, 03:32:22 PM
Thank you very much Peter.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 22, 2013, 12:39:42 PM
Today I got up early and headed out to the workshop with a pan of coffee. I forgot to test if the new oil block is leak free so I removed it from the shaft tunnel, blocked off the exits and gave it 5 kg oil pressure. Not a sign of a leak so I am satisfied. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011395.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011395.jpg.html)

While I had the piece removed I milled the wire lock grooves a bit wider so I could lock the bolts properly.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011396.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011396.jpg.html)

Assembling the shaft tunnel and diffuser housing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011397.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011397.jpg.html)

This is what the new wire locking looks like, a bit better than before. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011398.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011398.jpg.html)

After that I could fit the combustor/NGV piece, the cheramic coating holds up remarkably well despite being exposed to close to 1000°C during some of the early runs.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011400.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011400.jpg.html)

I test flowed the syringe injectors to see if any of them were blocked by dirt in the fuel system, as far as I could tell all of them were flowing fuel so it is all good.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011399.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011399.jpg.html)

Turbine shaft fitted and compressor wheel on its way!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011401.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011401.jpg.html)

The compressor nut is angle torqued to 130°-145°, feels insanely much but that is according to the manual so it must be correct.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011402.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011402.jpg.html)

After some more assembling the JU-01 was completed and waiting to be put back in the frame where it belongs.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011404.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011404.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on September 22, 2013, 04:21:35 PM
Anders:  It's been a while since I looked at the beginning of this build, so I'll ask you here:  Are you going to run this bike at the Speedweekend on Ice this coming winter, or is it for Bonneville and other non-ice tracks?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 22, 2013, 10:21:52 PM
Hi Seldom,

The idea from the beginning was to race at the ice track but I have had to reconsider that, the lake is regulated so no matter how they prepare the track it gets pretty bumpy by the time the race takes place. Iīve heard of guys who have had both front and rear tire in the air at the same time in some of the larger bumps... :-o

With my hard tail frame the rear tire will spend lots of time in the air at higher speeds, and the nature of turboshaft engines is that the faster the output shaft spins the more power it makes up to the point where the driveline disintegrates.

Combine this with a slow throttle response (the nature of gas turbines) and I can get myself into a situation where the rear wheel starts spinning uncontrollably in the air and tear the spikes out of the rubber when it gets back into contact with the ice.

No rush with the build in other words, my aim is to road test the bike this summer and maybe just maybe attend to the flying mile race at Tierp Arena if the bike is ready.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 26, 2013, 03:34:02 PM
The engine is back in the frame now, I had to grind some material away from the air box for the engine to fit between it and the freepower housing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011405.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011405.jpg.html)

I need to mill a couple of mmīs from the gearbox mounts to get the JU-01 and freepower housing to align at the V-band clamp.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011406.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011406.jpg.html)

Then it was the issue with the chain tension, I havenīt decided yet if I should fit a chain tensioner or not but no matter what I still have to mill away the corner on the gearbox mount.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011407.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011407.jpg.html)

This is the first time I really miss a tilting vice, I managed to use my ordinary vice but it took some effort... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011408.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011408.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on September 26, 2013, 06:35:47 PM
Nice work, hope you get some test runs in soon. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 26, 2013, 10:36:28 PM
Thanks! Unfortunately winter is arriving fast here in Sweden now so the only test runs I can do for the next 7 months or so are stationary ones.


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on September 26, 2013, 10:47:51 PM
Every one to his own taste but when I'm working in the shop I prefer some Tal Farlow on the stereo system.

http://www.youtube.com/watch?v=6SagCCeZXZo

Regards, Neil  Tucson, AZ
You mean you don't know of Seasick Steve?, I bet Anders does. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 27, 2013, 11:02:32 AM
I took half the day off from work today to fix my plasma cutter, Olov will borrow it to cut the flanges for the new jet kick this weekend. I had some time left so I milled 1mm off the gearbox mounts for better alignment between gas producer and power turbine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011409.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011409.jpg.html)

Finished!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011410.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011410.jpg.html)

With the smallest front sprocket fitted I have enough clearance for the drive chain, later when I need higher gearing I need to figure out some kind of chain tensioner but this will do for now.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011411.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011411.jpg.html)

I am very very close to the test start of the bike, >I only have to rivet the drive chain and brush some dust from the suit. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011412.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011412.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on September 27, 2013, 11:09:23 AM
Brilliant work!

I love that seat, is it from Ikea?   :-D

Dean


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on September 27, 2013, 09:59:49 PM
It looks like you are close to building the shields and guards.  Titanium is about 60% the weight of steel and very and strong.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on September 27, 2013, 10:24:17 PM
That's a crack job of running wires  :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 27, 2013, 11:30:25 PM
Dean: Actually yes, I made it from a leftover kitchen drawer. :-D

Wobblywalrus: Not quite yet but I am getting there. Titanium would be the material of choice if my budget was larger, but since this build is funded by whats left in my pocket by the end of each month I will have to settle for stainless.

I think the total weight isnīt that bad anyway, I will weigh it this week if I can find a suitable scale. Hopefully <200kg.

Stainless1: He he, no need to make any fancy wiring since it will only be used for the initial testing. Once the engine is a confirmed runner I will take everything apart for the final frame welding and some paint, and during assembly a "real" wiring will be done.

No more sitting on the ignition coil wire... :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 01, 2013, 02:49:09 PM
Iīve done the last stuff that needed to be fixed before the test start now, I fitted the new brake discs...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011416.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011416.jpg.html)

...and cut the drive chain to lenght and riveted it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011415.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011415.jpg.html)

With that done I held my breath and tested if the piston ring seal would still leak oil or not, to my great relief not a single drop came out of the drain after a minute with 3.5kg oil pressure! :cheers:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011413.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011413.jpg.html)

If the weather and time permits I will try to start the bike on sunday, so stay tuned!

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on October 01, 2013, 04:06:44 PM
Looking forward to some video of this fine machine! Keep us posted Anders!


Title: Re: APS/Ω Gas turbine bike build
Post by: Captthundarr on October 01, 2013, 06:10:58 PM
Wooo Hoo Anders. Videos are a requirement when testing :-D :cheers:

Frank


Title: Re:
Post by: bbarn on October 01, 2013, 06:13:49 PM
We need video WITH SOUND! There are very few things (in my book anyhow) cooler than the sound of a turbine engine starting up.


Title: Re:
Post by: Captthundarr on October 01, 2013, 06:19:55 PM
We need video WITH SOUND! There are very few things (in my book anyhow) cooler than the sound of a turbine engine starting up.

AGREED


Title: Re:
Post by: gkabbt on October 01, 2013, 07:29:15 PM
We need video WITH SOUND! There are very few things (in my book anyhow) cooler than the sound of a turbine engine starting up.

AGREED

Not meaning to jack Anders thread but I was at the start Sunday morning in Wilmington when the Zanefeld TIII liner was started and made it's second pass.
Turbines are WAY cool!   :cheers:

Now back to your regularly scheduled Anders thread!   :-D

Gregg


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 02, 2013, 04:14:59 PM
Donīt worry guys, there will be plenty of video footage taken during the test. :-)

I couldnīt resist to go back outside last night and do a start cycle without adding any kero. I removed the propane regulator so I can start the engine directly without any need for a preheat fan.

I tested several times by opening up the scuba tank so the rotor starts turning, then I craned the propane tank fully open and pushed the ignition button so it lit off. Then I opened the scuba tank fully and had the rotor at its full "dry" revs with the propane heating up the engine internals very fast.

Guess if I was tempted to start the fuel pump PWM and crank the engine up to idle inside the workshop... 8-)

After the test I checked for any oil pooled up inside the engine but didnīt find a drop, things are looking mighty promising for this weekends test!

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 03, 2013, 02:58:28 PM
I figured out today that I needed to move the PWM controller from the position on top of the battery to the handlebar if I want to throttle the bike while riding it, so an hour ago I went outside and did just that.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011417.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011417.jpg.html)

After that I filled oil in the gearbox, fitted the fairings and went over the bike to find any loose bolts.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011418.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011418.jpg.html)

Here you can see the chain in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011419.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011419.jpg.html)

The last two evenings I have had the diving compressor running to fill my two 15 liter scuba tanks, it is a bit worn so the pressure doesenīt get higher than 170 bar but that is enough to get the bike started.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011420.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011420.jpg.html)

As you know Iīve tested the preheating and air start already so now everything is set for the test on sunday morning. If everything goes as planned I will have a video on youtube before I go to bed. :)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 04, 2013, 03:56:20 PM
I just remembered that I havenīt weighed the bike so I went outside with the bathroom scale to find out how it compares to a modern sportbike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011422.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011422.jpg.html)

Weight on the front wheel is 82.5kg, not bad. What about the rear?

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011421.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011421.jpg.html)

It weighed in at 95.8kg, much thanks to the heavy battery and cast iron gearbox. Add up the numbers and you get 178.3kg with 15kg of fuel and oil in the tanks, remove that and you get a dry weight of 163.3kg! :lol:

Sure, I have to strenghten the frame somewhat and make a rear fender etc. for it but those things will only add a couple of extra kilos. It is actually possible to reach a power/weight ratio of 1:1 or even better after the engine has been tuned in!

(http://i231.photobucket.com/albums/ee196/Anders811017/Duke2_1118017i.jpg) (http://s231.photobucket.com/user/Anders811017/media/Duke2_1118017i.jpg.html)

As a comparison the Ducati 1198 has a dry weight of 171kg and I bet its gearbox isnīt made out of cast iron either. :roll:

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 06, 2013, 04:03:07 PM
Today was D-day, my friends had gathered and the BBQ set for a kerosine smelling lunch! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011430.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011430.jpg.html)

As you can see we went all the way and made camp with my new race tent, always good to get some practice in raising it before we have to do it in the middle of the night in full snow storm in Orsa...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011429.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011429.jpg.html)

With rain fast approaching we decided to kick of the test immediately, scuba tank and propane all set so I gave her a spin.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011432.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011432.jpg.html)

Here is the video from the day, see it first to better understand the comments below.

http://youtu.be/1GGNreBzPkY (http://youtu.be/1GGNreBzPkY)

It was a bugger that the switch broke, but looking at the video footage I think something was wrong even before I lost oil pressure. During the first run I had a stable exhaust temp around 600°C or so (mental overload so canīt remember exactly) but then the temps started to climb fast and then the fuel pump shut off due to the lack of oil pressure. (a pressure switch trips the fuel pump if the oil pump stops)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011424.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011424.jpg.html)

This is the piston ring seal after the teardown, my guess is that a rotor out of balance combined with a too tight clearance for the piston ring seal in its housing made it rub against the wall until the piston rings overheated and jammed up everything.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011435.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011435.jpg.html)

Luckily I have two bearing sets on their way so with a new piston ring seal and a somewhat opened up seal housing it shouldnīt rub any more. I will also send the rotor away for rebalancing and point out that the compressor wheel and the shaft must be grinded so I can align them perfectly during assembly.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011427.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011427.jpg.html)

Right now I have no clue how they were aligned during balancing so they can be assembled way out of balance for all I know.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011423.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011423.jpg.html)

Despite this minor setback I am satisfied with the test, the starting procedure was flawless (it would have been easier with three hands though) and from what I remember of the idle exhaust temp the power turbine section must be correctly sized.

The shaft looks ok though I will measure it again with the indicator clock in the lathe before I send it away for balancing, the comp wheel throw in the video was from the piston ring seal rubbing unevenly in its housing and not a bent shaft. Pheww! :)

Cheers!
/Anders


Title: Re:
Post by: bbarn on October 06, 2013, 04:24:49 PM
Anders - I have been checking all day anxiously waiting to see how your test went. It is great to see you and your friends gathered around enjoying yourselves.

While the test wasn't flawless, it certainly was a complete failure either. It looks like a minor setback in a stunning build. Given the expertise you have demonstrated thus far in the build, I have every confidence you will sort it out and wow us with your fix!

Keep at it, we are all rooting for you! I have complete confidence you will be successful!


Title: Re: APS/Ω Gas turbine bike build
Post by: Vinsky on October 06, 2013, 06:23:15 PM
This is a story of a modern day Burt Munro. I hope to see it on the salt some day.


Title: Re: APS/Ω Gas turbine bike build
Post by: Tim Thomssen on October 06, 2013, 09:54:59 PM
Awesome build, thanks for sharing!

For the switch you might try an old drag bike trick.  Get a heavy duty Caterpillar or similar HD implement  double throw switch and wire both sides in parallel for some built in redundancy.

Cheers!

Tim


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 07, 2013, 01:32:35 PM
bbarn: Thank you very much, my friends are the best so for every setback we share a laugh and start discussing how to solve it.

Vinsky: I will bring the bike to the salt even if I have to row it over the ocean myself. :-)

Tim Thomssen: Thanks! That is an interesting solution, something has to be done for sure because I donīt want a component failure happening again. Hopefully the turbine shaft can be reused, I will go outside now and measure it.


Title: Re: APS/Ω Gas turbine bike build
Post by: charlie101 on October 07, 2013, 02:42:31 PM
A bit disturbing when the engine breaks because a lack of oil supply, a remedy would be to have a spring loaded oil pressure tank after the oil pump that supplies the bearings with oil during spool down in the case the pump will give up. It should also function as a security if the pump temporary loose oil supply when you don't have baffles in the oil tank and is reducing speed or jumping around on an uneven track. No need to risk the engine because a unplanned occation as a flat tire or veering off on some bumpy track side. Also any battery can break, and risk that happen again even with larger sealer play?


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on October 08, 2013, 09:25:35 AM
  Any chance that there isn't sufficient end gap on the seal rings and they are seizing up in the bore as the heat builds? What the heck do I know? I only work on old Buick straight eights. Love this build of yours. Been following it from the beginning. Maybe it's beer time.
  Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on October 08, 2013, 11:15:08 AM
A small oil accumulator should provide a constant oil pressure, even for a while when the engine is spooling down.


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on October 08, 2013, 01:07:35 PM
A small oil accumulator should provide a constant oil pressure, even for a while when the engine is spooling down.

Neil is correct on this.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 08, 2013, 02:43:23 PM
Charlie101, Manta22 & Glen: It is a nice thought but not very practical unfortunately, the engine flows massive amounts of oil and takes aprox. 10 seconds to come to a halt from max revs. An accumulator that can provide positive oil pressure at these flows for 10 seconds needs to be huge...

Buickguy3: Thanks! I measured the ring end gap to 0.5mm so that shouldnīt be the problem, I have taken the engine apart now and am measuring everything to figure out what went wrong.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011441.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011441.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 12, 2013, 10:49:13 PM
Hi guys! After some investigation I have figured out why the shaft seal failed on me, I had to assemble the rotary parts and measure the throw in the lathe before I understood what really happened during the run.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011443.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011443.jpg.html)

The main problem is that the shaft tunnel and the compressor housing arenīt perfectly concentric, I didnīt use dowels to fix the engine core together but relied on the four M10 insex bolts to keep the parts alligned. That turned out to be a mistake since the two could move over 0.5mm with the bolts loosely torqued.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011440.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011440.jpg.html)

When I assembled the engine before this run I had the misfortune to get very bad concentricy for the engine core so the shaft piston ring seal
rested lightly against its seat. When the engine started this made the seal heat up to the point that the ring grooves collapsed from the pressure from the highly torqued compressor nut.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011444.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011444.jpg.html)

This was what I figured out when I fitted the assembled shaft in the lathe, properly torqued it was bent to the degree that I didnīt even bother to measure it. I removed the parts from the turbine shaft, measured them and found the shaft seal to be bent by 0.1mm. This in turn bent the entire turbine shaft and produced the imbalance clearly heard during the second start in the video, it bent so much that the compressor wings touched its housing just before the engine came to a halt but luckily without any damage to the compressor wheel.

Right now I am lining up the shaft tunnel and compressor housing in the lathe and preparing to fit dowels so they will fit together exactly the same every time I assemble the engine, a friend will drop by this afternoon with a reamer and dowels so hopefully I will have it done before the end of next week.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011445.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011445.jpg.html)

It is great to have found the problem, hopefully I will have most design flaws removed from the engine by the time I start racing the bike. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 14, 2013, 03:59:53 PM
Time to fit a pair of dowels to the engine core.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011447.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011447.jpg.html)

To get the holes drilled and reamed for the dowels I fitted the JU-01 core to the rotary table in the mill.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011448.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011448.jpg.html)

After drilling each 5.8mm hole I reamed it at the lowest speed in the mill.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011449.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011449.jpg.html)

With both holes done I removed the shaft tunnel and fitted the dowels, actually it was a bit difficult because the hole was so exact that the dowels kept popping back out from the air trapped under them. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011450.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011450.jpg.html)

The fit is perfect, Iīll order a set of reamers for future projects because this is something I havenīt done for the last time.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011451.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011451.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Rex Schimmer on October 14, 2013, 10:12:53 PM
Your reply to the accumulator comment "Charlie101, Manta22 & Glen: It is a nice thought but not very practical unfortunately, the engine flows massive amounts of oil and takes aprox. 10 seconds to come to a halt from max revs. An accumulator that can provide positive oil pressure at these flows for 10 seconds needs to be huge...) may not be quite true, give me the flow rate required, and the maximum pressure that the system runs at and I will calculate the accumulator size. For 10 seconds it doesn't take much of an accumulator to provide up to a flow rate of several hundred gallons per minute. In todays world there are so many accumulator choices for pressure and material that there is probably one that will work.

Rex


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 15, 2013, 04:36:58 AM
Hi Rex,

A friend has measured the TV94 rotor assembly oil flow, Iīll forward the numbers once he has answered my email.

One of the reasons for why I havenīt considered this is because I use scavenge pumps instead of gravity drain for the oil, so in case of a power failure for the pumps the bearings are still wrecked since the oil from the accumulator has nowhere to go once it has entered the bearings.

Still I am interested to hear the result of your calculations, if the volume of oil is low enough it might actually be possible to fit an accumulator to the bike.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 15, 2013, 03:56:04 PM
Hi again Rex,

Here is my friends reply:

------

Hi Anders

I never did measure the flow through the engine as I was more concerned about simply maintaining oil pressure , as long as the pressure was high enough the the flow was OK .

The pump I made for testing the engine was capable of ~10 litres/minute , any accumulator would need to be at least 1 litre oil capacity from the pressure the fuel pump cutout was set at , probably 45 psi -3 bar if running pressure was 60 psi -4 bar ................a relatively high cutout pressure is a good idea even if the pump was working but pressure decayed as the flow increased due to reduced viscosity from high oil temps , ..........this happened with the 10/98 after extended running, oil pressure dropped below normal design pressure as the oil heated up .

Even if the engine was at max rpm when the pump failed it would only take a few seconds for the rpm to be reduced to quite modest rpm that didn't require pressure lube , the compressor wheel at full power is a 250 horsepower brake without the turbine driving it ..................the overall accumulator volume of oil and air above it would need to be 3 or 4 litres

Cheers
John


---------

I still think I will skip the accumulator, when I get the bearings set up right and fit a quality switch for the oil pump there shouldnīt be any more problems and besides the space available for a 3-4 liter accumulator simply doesenīt exist.

I have ordered an adjustable Hobbs oil pressure switch so I can set the cutout oil pressure for the fuel pump to 30-35psi instead of the 5 or so psi I have now, then I have bought the gas turbine some time to spool down before it runs dry.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 16, 2013, 12:49:25 AM
Is there a ceramic bearing that can run dry for a long enough time to let the engine slow down?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 16, 2013, 01:00:17 PM
The gas producer use journal bearings just like a turbocharger, changing them to ball bearings would be a huge undertaking since the rotor loads would be completely different.

Perhaps if I made a hybrid system with an oil assisted thrust washer and cheramic ball bearings but naahh that would be too complicated. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on October 16, 2013, 04:21:17 PM
Do you realy need pressure ,  a 1 or 2 lit accumulator with a flow control orifice give you 30 sec to a min oil flow just to keep the bearings lubricated on shutdown .
And a collection reservoir of similar capacity could be placed pre scavenge pump

some of the automotive accumulators are an easy design to modify for capacity change  and only 75mm dia 
 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 17, 2013, 05:00:51 AM
A friend  (John Wallis, you know him from JATO maj) gave me a good advice yesterday, he had his oil filter upside down and the air trapped in the filter acted just as an accumulator and make the oil pressure drop gradually after shutoff.

I will do it like this and no complicate things further, I havenīt got much room left so adding more stuff to the bike is the last resort.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 17, 2013, 09:07:41 PM
Anders, I was suggesting a ceramic bushing and not a bearing.  My mistake.


Title: Re: APS/Ω Gas turbine bike build
Post by: gidge348 on October 17, 2013, 09:19:58 PM
A friend  (John Wallis, you know him from JATO maj) gave me a good advice yesterday, he had his oil filter upside down and the air trapped in the filter acted just as an accumulator and make the oil pressure drop gradually after shutoff.

I will do it like this and no complicate things further, I havenīt got much room left so adding more stuff to the bike is the last resort.

Actually that is a really clever idea that the spin on oil filter companies should take up......

If the filter had a sealed rubber ball (accumulator) inside spin on filter and when the engine was started oil pressure collapsed the ball and the filter worked like normal and when the engine was stopped the ball would force the oil out through the system for a short time. No extra plumbing or accumulator tanks just throw the whole thing away each oil change.... :-)

Not sure if something like this exists if not someone could make a whole lot of money from it......


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 18, 2013, 12:24:19 AM
Anders, I was suggesting a ceramic bushing and not a bearing.  My mistake.

Cheramic journal bearings would probably lead to disaster in case of an oil failure, the idea with the soft copper alloy bearings is that they will take up all wear to save the shaft and housing. A cheramic bearing would eat through both before the engine has come to a halt... :|

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 26, 2013, 01:40:16 PM
While I am waiting for some parts for the bike a friend and I (the productive core of Mobacken Racing) have started building a new jet-kicksled for next years landspeed on ice race at Orsa, twin Schwitzer S500 based afterburning gas turbines producing >1000N of thrust with the driver standing on two 5mm thin spring steel runners...  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Jetspark%20MK3/Twinturbospark25.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Jetspark%20MK3/Twinturbospark25.jpg.html)

With everything dialed in we hope to run at lest 160km/h, hopefully even faster. Should be an interesting ride, two years ago Olovs leg caught fire from the radiant heat from the old jet kicks afterburner, with almost three times the thrust both legs and a fair bit of his behind are in danger... 8-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Stan Back on October 26, 2013, 02:01:50 PM
Have you guys ever thought of just shooting yourselves?


Title: Re: APS/Ω Gas turbine bike build
Post by: octane on October 26, 2013, 02:11:41 PM
While I am waiting for some parts for the bike a friend and I (the productive core of Mobacken Racing) have started building a new jet-kicksled for next years landspeed on ice race at Orsa, twin Schwitzer S500 based afterburning gas turbines producing >1000N of thrust with the driver standing on two 5mm thin spring steel runners...  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Jetspark%20MK3/Twinturbospark25.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Jetspark%20MK3/Twinturbospark25.jpg.html)

With everything dialed in we hope to run at lest 160km/h, hopefully even faster. Should be an interesting ride, two years ago Olovs leg caught fire from the radiant heat from the old jet kicks afterburner, with almost three times the thrust both legs and a fair bit of his behind are in danger... 8-)

Cheers!
/Anders

I'm telling you : the Swedes are nuts !
Absolutely brilliant !!!!!!!!!!!!!!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 26, 2013, 02:23:56 PM
Have you guys ever thought of just shooting yourselves?

Nahh, a gas turbine harakiri is sooooo much cooler. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: octane on October 26, 2013, 02:24:23 PM
Anders: you gotta' come to Copenhagen and we'll go visit a friend of mine; Claus
( who will do the welding of my frame ).
He's part of this here project which is quite mind-blowing and right up your alley,
rocket engine and all:

http://youtu.be/1i3HDv2s7io

The nutters all do it in their spare-time and just for the fun of it.

First they made a small freaking submarine....that worked quite well...
then a BIG freaking submarine...that worked well too.
Where do ya' go from there ?....into space of cause !

They are doing brilliantly:

They've just been awarded The Fédération Aéronautique Internationale (FAI) Breitling Milestone Award 2013:

“Copenhagen Suborbitals have achieved an outstanding performance and contribution to astronautics by designing, building and launching the world’s first amateur built full size rocket with full computer control and steering – based completely upon amateurs and donations.

The results has been achieved from nothing – and this has demanded the highest level of vision, patience, and creativity, organizational and technical skills in different areas from computer programming to economics and funding.

The way of thinking, working and the way of sharing information in aeronautics has never been seen before, and can change the way we interact with others and the way we travel in spac
e.”


Title: Re: APS/Ω Gas turbine bike build
Post by: octane on October 26, 2013, 02:26:58 PM
Click:

http://www.copenhagensuborbitals.com/

I'm sure you'd enjoy a visit.
They are just around the corner from my place.

.

OK then;  the Danes are nutters too !


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 26, 2013, 02:39:56 PM
Iīve followed those guys for quite some time now, I love what they are doing and that they are doing it on a "shoe string" budget and not an infinite well of tax money like NASA. Please tell them that Mobacken Racing are huge fans and wish them all the best! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: octane on October 26, 2013, 02:51:02 PM
Will do Anders:

For those digging this kind of things, this is interesting;
These nutters are building everything from scratch in an un-heated workshop  and it's all
quite simple....NOT :

 http://youtu.be/p6BC1QfA0Ug?t=12m23s


.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 29, 2013, 04:31:16 PM
While waiting for some parts to arrive I made up a list of things to do before the engine can be reassembled, you can probably not read it but it says rebuild the oil return, fit new Hobbs oil pressure switch, true the compressor spacer, make new piston ring seal housing and send the rotor away for rebalancing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011452.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011452.jpg.html)

My friend Lars-E (one of the V1 pulsejet sled guys) offered to true the comp spacer in his grinder at work, it lost a little shape from the heat when the piston ring seal got destroyed so it needs some work.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011454.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011454.jpg.html)

Tonight I have been making parts for a new and improved oil scavenge line, the old one was made out of hydraulic tubes with metric threads cut so deep that I constantly worried that they would snap when the external AN-connections were torqued in place. The new steel ones have UNF threads that arenīt nearly as deep as the metric threads, Iīve also added a flange on the inside so they can be torqued without stressing the connection tubes.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011455.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011455.jpg.html)

Here I have just cut the old tubes to fit the new steel ones, a look at the workshop clock told me that time had rushed by so I had to call it a night. When I got back inside and happened to look at the kitchen clock I realized that the workshop clock was still running on summer time and therefore an hour ahead. Damnit! :)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 04, 2013, 05:04:03 PM
I finished the oil scavenge lines today along with some other stuff.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011457.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011457.jpg.html)

First of the two scavenge tubes mocked up.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011458.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011458.jpg.html)

And here they are welded in place!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011459.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011459.jpg.html)

With the scavenge line finished I modified four M10 stainless insex bolts in the lathe, they will be used to bolt the diffusor housing to the shaft tunnel instead of the abused 12.9 bolts Iīve used earlier.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011460.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011460.jpg.html)

Last week I got the Hobbs adjustable pressure switches I ordered.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011456.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011456.jpg.html)

Here one of them is fitted to the oil filter holder, now I can set it so that the fuel pump shuts off below 3 kg oil pressure. It will spare the bearings compared to earlier when I had a 0.2 kg standard automotive oil pressure switch.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011461.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011461.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 06, 2013, 02:26:46 PM
My friend Lars-E offered to grind the compressor spacer flat since it got a bit distorted from the heat when the piston ring seal rubbed its housing, he emailed these pics last night to show that he was finished.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011463.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011463.jpg.html)

Here is the finished spacer with measurement protocols before and after the grinding, as you can see the spacer was out well over one hundredths of a mm and close to the shaft centre it would bend the shaft badly.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011464.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011464.jpg.html)

I removed the piston ring marks from the piston ring housing in the lathe and found that it can be used again, great news!  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011465-1.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011465-1.jpg.html)

All I am waiting for right now is the bearing kits Iīve ordered. When I get them I can assemble the entire turbine shaft, mark every part up for alignment and send it away for balancing!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011466.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011466.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on November 06, 2013, 02:56:48 PM
Anders, in reference to the welded oil lines connecting the little black box to the big aluminum round thing.  It would be a good idea to pressure test that system if you can at the extreme ends of the expected operating temperature range.  The aluminum disk will have quite a bit of expansion and contraction when it heats and cools.  This might affect the seal.

In addition, the design should account for the contraction and expansion to prevent overstressing the oil lines and the resulting fatigue failure.  Some times we put a curly-Q loop in an oil line so it will not be overstressed.     l


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 07, 2013, 05:19:46 PM
Anders, in reference to the welded oil lines connecting the little black box to the big aluminum round thing.  It would be a good idea to pressure test that system if you can at the extreme ends of the expected operating temperature range.  The aluminum disk will have quite a bit of expansion and contraction when it heats and cools.  This might affect the seal.

In addition, the design should account for the contraction and expansion to prevent overstressing the oil lines and the resulting fatigue failure.  Some times we put a curly-Q loop in an oil line so it will not be overstressed.     l

The oil lines are suction lines so a slight under pressure is all it will ever have to endure.

What you cannot see in the pics is the combustor can that takes up almost all space inside the engine so it is impossible to add any flex loops or similar to the line. I understand your concern but Iīll take my chances and hope that it wonīt be a problem. If cracks start to appear I will have to rethink but for now this will do.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 19, 2013, 04:17:58 PM
Not much have happened on the bike during the last weeks, lots of work away from home and a pair of beer trips as well has stolen all workshop time from me. Space is even more cramped now since I brought my "daily driver" Triumph bobber in from the cold to get the tank welded and exhaust pipes modified a bit.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011467.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011467.jpg.html)

Tonight I felt I had to do something while waiting for the rotary parts to arrive from balancing, I took two JIC 9/16" steel couplings and made the scavenge line couplings from them.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011468.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011468.jpg.html)

Here they are fitted, way better and tighter fit than with the old couplings so this will work great! :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011469.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011469.jpg.html)

I mailed the newly grinded compressor spacer to the balancing company today, unfortunately the bearing kits they ordered for me didnīt contain all the parts needed so it will take some time before they get the new sets and can balance the complete rotor.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on November 19, 2013, 04:41:39 PM
That's a lot of work there and I'm trying really hard to understand what goes on in that turbine but I enjoy the updates. Thanks. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on November 20, 2013, 01:25:42 AM
I know, Mike.  It is interesting and confusing.  That must be 'cause it is different than what we usually see.  People tell me these turbines are much simpler than our reciprocating engines. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 22, 2013, 03:24:57 PM
They really are quite simple, the calculations behind building one are massive but there is only one moving part in the engine which makes them relatively easy to understand.

If I were better at 3d-CAD I could make a model of the engine that would better show exactly how it all goes together but as it is you have to try to imagine it somehow.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 28, 2013, 04:48:11 PM
While waiting for the turbine shaft to come back from balancing I figured I could fix the throttle arrangement, the manual needle valve throttle I made didnīt flow enough fuel so I had to use a PWM controller for the fuel pump. Up until now I have had a PWM controller zip tied to the handlebar but it would be impossible to adjust the tiny knob while riding... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011470.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011470.jpg.html)

A friend of mine has a spare part Mercedes that I could scavenge the throttle position sensor from, it is basically a potentiometer so I figured I could use it to control a PWM module. Testing it on a fuel pump confirmed this so I fitted it to the air box and started making the throttle wire mount.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011471.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011471.jpg.html)

That went well, I used a long bolt as an adjustable throttle stop so I can set the max throttle setting manually. Idle is adjusted on the wire tension screw.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011472.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011472.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 09, 2014, 02:33:44 PM
Finally Iīve got the turbine shaft back from balancing, it was some .1mm bent but not more than it could be straightened again. Phew, the turbo rebuilder saved me a pile of cash there...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011476.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011476.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on January 09, 2014, 02:43:59 PM
Great to hear Anders! Hope too see your bike running under it's own power again soon!  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 09, 2014, 04:44:53 PM
Great to hear Anders! Hope too see your bike running under it's own power again soon!  :cheers:

Shouldnīt take too long I hope, but I am in the middle of building a new gas turbine sled for the Speed Weekend on Ice here in Sweden so I have little time for the bike until the race is over.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Jetspark%20MK3/Twinturbospark61.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Jetspark%20MK3/Twinturbospark61.jpg.html)

I am also doing the winter overhaul/modifications on my daily driver so despite the silence in the build thread I am keeping myself busy.  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Bonneville%20bobber/Nyatanken12.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Bonneville%20bobber/Nyatanken12.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Koncretekid on January 09, 2014, 06:24:49 PM
Finally, something I recognize!  A Triumph!


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on January 09, 2014, 09:04:05 PM
Are you going to ride the sled?  How fast do you expect it to go?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 10, 2014, 12:15:53 AM
Are you going to ride the sled?  How fast do you expect it to go?

My partner in crime Olov is the designated driver for the sled, but Iīll certainly try it out to see what it is good for. Our old sled with less than half the thrust ran 122km/h so this one should easily go over 160km/h when everything is tuned in.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Jetspark%20MK3/Twinturbospark93.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Jetspark%20MK3/Twinturbospark93.jpg.html)

Should be an interesting ride when you are standing on steel runners 5cm above the ground... :-D

/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 10, 2014, 12:27:07 PM
Kid puzzle:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011477.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011477.jpg.html)

Grown up puzzle:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011478.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011478.jpg.html)

Before I can assemble the engine I need to make a new stainless piston ring sleeve for the diffuser housing, the old one got damaged when the rings seized up and after machining the bore the ring end gap was too large.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011480.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011480.jpg.html)

Then I modified the new front thrust bearing surface a bit so it would fit.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011479.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011479.jpg.html)

With that done I cleaned everything with acetone and fitted the sleeve to the housing with cylindrical fastener, I left it to cure over night so tomorrow it should be permanently locked in place. A safety tap with the center punch at the edge of the hole will make sure it can never work its way into the back side of the comp wheel.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011481.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011481.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on January 12, 2014, 05:44:46 PM
Finally Iīve got the turbine shaft back from balancing, it was some .1mm bent but not more than it could be straightened again. Phew, the turbo rebuilder saved me a pile of cash there...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011476.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011476.jpg.html)

Cheers!
/Anders

Your turbo guy looks like a cool cat
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on January 12, 2014, 10:53:43 PM
   Cats are very "non-committal".
  Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 13, 2014, 05:04:18 PM
 :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 25, 2014, 03:55:16 PM
Finally some time over for assembling the engine! I know you have seen these assembly pics 100 times before but bear with me. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011482.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011482.jpg.html)

The new thrust bearing in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011483.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011483.jpg.html)

To be able to torque the compressor housing bolts in an easy way I made a jig plate for the shaft tunnel, earlier I have had to hold the engine with one hand and torque it with the other. Not very practical...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011484.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011484.jpg.html)

Thatīs more like it, why didnīt I make this jig earlier? :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011485.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011485.jpg.html)

Now was the time to wire lock some bolt heads!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011486.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011486.jpg.html)

To torque the turbine housing bolts I used the rotary table to hold the engine, under each bolt head I use a Nordlock washer to make sure the bolts wonīt come lose.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011487.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011487.jpg.html)

This is as far as I made it before I ran out of batteries in the portable Baby Watch, much more space on the working table now. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011488.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011488.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 27, 2014, 05:28:49 PM
Tonight I continued assembling the engine, here I am about to torque the compressor nut. Notice the dust-free environment which is of uttermost importance when working with these kind of thrust producing contraptions...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011491.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011491.jpg.html)

With the engine back together I will continue with the gearbox, it will be converted to dry sump with oil jets directed at every bearing and gear mesh. Figured it is better to get it done right away rather than wait until later when the roads are clear. Just for fun I stacked the engine together on top of the work bench, quite a pile it has become...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011492.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011492.jpg.html)

Looking at the engine assembled it is hard to understand that four years ago I made the first cut with the mill in an aluminum chunk later to become the compressor diffusor, lots of water has passed under the workshop bridge since then. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011494.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011494.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: gmansyz on January 28, 2014, 08:17:35 PM
What a freaking Awesome build!!!
Will you run it at Bonneville?
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 29, 2014, 03:56:04 PM
What a freaking Awesome build!!!
Will you run it at Bonneville?
G

Thanks G! :-)

I hope so one day, first I have to get it sorted out on the tracks here in Europe before I even think of shipping it to US. Lots of speed to be found in the tuning with these engines, and I will need every single horsepower if I am to go for the class record.

The fairings will have to be pretty slippery as well, I have the benefit of a very small frontal area since the turbine engine is only 30cm wide but the transitions between fairings and driver will need some work.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on January 29, 2014, 10:43:32 PM
  Anders, How wide is the driver?  :evil:  Beautiful work.
   Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 29, 2014, 11:46:49 PM
  Anders, How wide is the driver?  :evil:  Beautiful work.
   Doug  :cheers: :cheers: :cheers:

Mostly skin and bone, and Iīve taken up running to keep my frontal area as low as possible for the upcoming racing. No use getting into land racing half-hearted. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 11, 2014, 02:35:39 PM
With the counter is reset to "X hours to Speed Weekend" I need to get busy with the bike build, the bobber and the twin turbo jet kick has taken up all spare time up until now but from now on it is 100% turbine bike for me! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011497.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011497.jpg.html)

Last night I removed all wiring and fitted the engine in the frame to figure out where the frame can be strengthened without putting the tubes and steel plates where they are in the way when removing the engine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011496.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011496.jpg.html)

Ahh, I do have ONE project that has higher priority than the bike build. My feancee wants a new floor in the house so I am in the process of doing just that. Only three bedrooms left before I have the workshop for myself again! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011495.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011495.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Scottie J on March 11, 2014, 08:20:58 PM
That is freaking cool! Nice Work!   8-)     :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on March 12, 2014, 12:27:48 PM
Good to see you back at it Anders! Best of luck, and keep us updated!  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 12, 2014, 02:39:01 PM
Thanks!

Good to be back, you cannot even guess how eager I am to get busy with the turbine bike! 5 minutes ago I ordered a set of spiked motorcycle tyres for the bike and I am ebaying around to find some decent cheramic bearings for the gearbox.

Following the LSR rules, do motorcycle footpegs need to be foldable or can I simply weld a pair of CrMo tubes to the frame and be done with it?

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Scottie J on March 12, 2014, 09:47:10 PM

........Following the LSR rules, do motorcycle footpegs need to be foldable or can I simply weld a pair of CrMo tubes to the frame and be done with it?

Cheers!
/Anders

From the SCTA Rule Book in regards to footrests:

Quote
Footrests shall be provided as per requirements of the class entered and the rider shall use them during the entire run.  Foot controls shall be operable with feet on the footrests.  Only one set of foot rest is allowed.

Scottie J


Title: Re: APS/Ω Gas turbine bike build
Post by: salt27 on March 12, 2014, 09:54:16 PM
Following the LSR rules, do motorcycle footpegs need to be foldable or can I simply weld a pair of CrMo tubes to the frame and be done with it?

Cheers!
/Anders

I have had both folding and fixed footpegs pass SCTA tech.

Fixed is my preference.

  Don


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on March 13, 2014, 10:54:54 PM
Norton Commandos, Nimbi, and Triumphs like mine use a large diameter backbone tube to give the frame strength.  Triumph uses a big square section tube.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 14, 2014, 03:23:20 PM
Thanks for the clarification guys, welded foot pegs it is!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 15, 2014, 03:32:22 PM
Tonight Iīve started cutting out templates for frame strengthening plates in 3mm steel, the steering head will need three of them to aid the welds so I wonīt drop the forks at speed... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011498.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011498.jpg.html)

The rear axle mount also got a pair of plates.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011499.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011499.jpg.html)

I started triangulating the rear of the frame when my littlest girl yelled on the Babywatch and I had to call it a night. That radio is worth its weight in gold for sure, countless late hours in the workshop that couldnīt have been done without it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011500.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011500.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 16, 2014, 05:01:43 PM
Tonight I finished making the templates for the 3mm sheet metal gussets.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011502.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011502.jpg.html)

I added a pair of CrMo tubes just below where the seat will be to lighten the load on the weld where the single upper frame tube ends.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011501.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011501.jpg.html)

At his point I removed the engine to see if any of the tubes would be in the way, they werenīt so I continued by removing the oil and kero tanks and air intake so I could add a couple of strengthening tubes between the lower frame tubes.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011503.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011503.jpg.html)

Here you can see them a bit clearer.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011504.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011504.jpg.html)

The biggest progress tonight is probably that I think I have figured out how to make the seat and the rear fairing for the bike, I wonīt tell you in case I change my mind but if it works it should look pretty good.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on March 16, 2014, 06:07:52 PM
using and triangulating bigger OD tubing might be a lot stronger .
 
also in place of some gussets .


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 17, 2014, 12:15:38 AM
using and triangulating bigger OD tubing might be a lot stronger .
 
also in place of some gussets .


Hmm, perhaps the two tubes between the lower frame tubes could be upsized to the same tube diameter as the rest of the frame. Thanks for the hint!

Iīve planned to add a few gussets to them, a bit difficult to figure out just where the gussets are needed when I havenīt any fancy computer simulation to play around with but I think Iīll manage. When I start road testing it I will find out how well it is done. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 20, 2014, 02:47:19 PM
Last night I spent three hours welding some of the gussets to the frame, I also removed the two thin bars between the lower frame tubes and replaced them with 1 1/2" CrMo tubes just like Saltwheels262 suggested. Looks much sturdier now, thanks for the hint! :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011506.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011506.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011507.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011507.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011508.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011508.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011509.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011509.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on March 20, 2014, 03:52:52 PM
Anders, a mate had an interesting issue not long ago on a new build tube frame drag bike
the bike was not handling very well under full load, found it was twisting as the hp increased and putting the front wheel out of line.
more triangulation seems to have fixed it
it was a 4 bar perimeter frame and i would have thought looked fine 
made me more aware on a future build i am planning to actually check the stiffness between headstock and rear axle an see what the normal movement is likely to be .

After one of my bikes which handled bad and was found to have a 3.5 deg camber , and replaced with a frame that has less than 1 deg camber
i know for sure you want your front wheel positioned very nearly  perfect under load or the whole thing gets very fishtaily   



Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 20, 2014, 04:32:59 PM
Hi Maj,

Iīve been thinking about this quite a lot. A drag bike engine has tons of torque and leaves the line at full throttle doing its best to make a cork screw of the frame, my land speed bike has no more torque than a fairly standard hayabusa and leaves the starting line smoothly with the constant torque curve of a turboshaft engine.

I can understand that a drag bike needs a beefy frame to counteract all that twisting force, but in my case it feels like I should get away with a slightly less rigid frame.

How the frame will react at higher speeds with regard to fish tailing etc. I can only wait and see, I will build the frame like this and try it out and if it shows any tendency to become unstable I will have to do some thinking.

Cheers!
/Anders

Anders, a mate had an interesting issue not long ago on a new build tube frame drag bike
the bike was not handling very well under full load, found it was twisting as the hp increased and putting the front wheel out of line.
more triangulation seems to have fixed it
it was a 4 bar perimeter frame and i would have thought looked fine 
made me more aware on a future build i am planning to actually check the stiffness between headstock and rear axle an see what the normal movement is likely to be .

After one of my bikes which handled bad and was found to have a 3.5 deg camber , and replaced with a frame that has less than 1 deg camber
i know for sure you want your front wheel positioned very nearly  perfect under load or the whole thing gets very fishtaily   




Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on March 20, 2014, 10:49:06 PM
This elaborates on what Greg is saying.  A real strong bracket is made to hold the rear of the frame onto the work table using the axle mounts.  This simulates the frame being connected to the rear wheel.  A big beefy steel rod is stuck through the steering stem with about 3 feet sticking out above and below the stem.

Then, you make some spider webs of sewing thread between different parts of the frame.

Last, you give the big rod a twist in different directions and you see how your frame flexes.  The threads go limp or tight to help you see what is happening.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 21, 2014, 12:05:17 AM
This elaborates on what Greg is saying.  A real strong bracket is made to hold the rear of the frame onto the work table using the axle mounts.  This simulates the frame being connected to the rear wheel.  A big beefy steel rod is stuck through the steering stem with about 3 feet sticking out above and below the stem.

Then, you make some spider webs of sewing thread between different parts of the frame.

Last, you give the big rod a twist in different directions and you see how your frame flexes.  The threads go limp or tight to help you see what is happening.   

That is a great idea, Iīll make sure to try it after the frame is welded to get some idea how flexible it is.


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on March 21, 2014, 12:27:03 AM
I've built a fair number of bike frames and I agree it's not as simple as it looks.

I see these TV shows where guys cut the backbone and change the rake and stuff.
I wonder how the camber changes on those?.

Defects show up on two wheels way before they would on four.
Bike frames are a SOB to get right.


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on March 21, 2014, 02:46:06 AM
IMO salt bike alignment will be more critical than the drag bike ,
 i drag raced my cambered frame for years , never knew there was a fault,
it was a modified frame , raked by a very reputable Aussie frame shop , i never thought i needed to check the work
and the issues only showed up on the salt .

Your maximum torque will be happening right where you need your best alignment ,
i like Bo's idea  , even just forcing the bar will give you an idea of the frames elasticity or rigidity 


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on March 21, 2014, 10:41:55 PM
Go into Images on Google and click in "Tony Foale."  There are a lot of frames there.  Go into the "Articles" section on Tony's website.  These is a frame stiffening article there.  The two cages he made for the Kawa work pretty well on double down tube frames.  You will see how the lower frame cradles move in relationship to each other when you twist the steering stem.  His cages tie the two lower cradles together and this increases the support of the steering head.  A similar principal works in the back.

An advantage of a strong chassis is felt when racing on a rutted rack.  The front wheel will climb out of a rut with much less drama if the chassis is beefy.  The wheel tends to follow the rut with a flexi setup.  Eventually it climbs out and almost always there is some whipping and over correction.  This sets up a series of machine or rider induced wigggles and wobbbles.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 22, 2014, 01:43:32 PM
Wow, lots of useful info on that website!

The "problem" with my frame is that most of the holes in the frame where an X or diagonal tube would do wonders have to be left open to house the oil pump etc, so there is not very much that can be done to it except for cutting away the upper frame tube and fit a pair of them instead.

That fix is on top of my list in case the bike is unstable at speed, shouldnīt be overly difficult to do.

Iīll make sure to measure the wheel camber and correct any difference by making custom rear chain tension blocks to get the rear wheel angle the same as the front wheel.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on March 22, 2014, 03:38:41 PM
Problem with a front end camber is not so much the angle but what it does to the wheel position on the ground and how that effects the whole bike , you would not notice so much initially as you would automatically correct , but when you get above a few % wheelspin it will become a handling issue
 



Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 24, 2014, 06:25:35 PM
With your concern for the frame stability in mind I went to the shed trying to figure out a way to stabilize the frame without having to rebuilt it completely, and I think I am on to something.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011510.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011510.jpg.html)

Adding one 1 1/2" tube on each side of the main upper frame should stiffen the frame quite a bit, a pair of tubes down each side connecting to the vertical tubes and I think I will have a frame that will behave like it should. At least way better than before.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011511.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011511.jpg.html)

Now when I look at the frame it looks ridiculously weak with only a single upper frame tube, youīve probably thought so all the time but been to kind to say it to me.  :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011513.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011513.jpg.html)

I just need to verify that the engine and air box will fit before I weld them in place, donīt think itīll be a problem but I better check anyway.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011514.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011514.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on March 24, 2014, 08:12:45 PM
Anders;

Tying the tubes together in a few places with short lateral tubes will help the stiffness but you were probably planning to do that anyway.

A 14 or 16ga steel sheet over the top of the tubes will be the best approach. Weld the edges to the outside tubes and put a number of rosette welds into the center tube.

Regards, Neil  Tucson, Az


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on March 24, 2014, 08:21:57 PM
Anders;

A 14 or 16ga steel sheet over the top of the tubes will be the best approach. Weld the edges to the outside tubes and put a number of rosette welds into the center tube.

Regards, Neil  Tucson, Az

not only making it really stiff but also providing a nice blast shield in case catastrophe strikes...


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on March 24, 2014, 10:11:44 PM

not only making it really stiff but also providing a nice blast shield in case catastrophe strikes...

Yep, what he said
G


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on March 24, 2014, 10:59:06 PM
You saw and fixed the biggest problem with those two upper tubes. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 25, 2014, 12:01:21 AM
I hear you Neil, but I have to give looks some thought as well since this part of the frame will be very visible so I will fit a number of short tubes connecting the new frame tubes to the old one down the entire length instead.


Title: Re: APS/Ω Gas turbine bike build
Post by: charlie101 on March 25, 2014, 01:15:48 PM
you can try this approach. It'll give a lot of answers really quick and cheap. http://www.autospeed.com/cms/article.html?&A=111100

http://www.autospeed.com/cms/article.html?&A=112924


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 25, 2014, 04:26:18 PM
An interesting technique Charlie, but nahh I think Iīll take my chances and finish the frame and find it out from the riders seat instead. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: charlie101 on March 25, 2014, 05:51:31 PM
What do you mean with that? You are about to stiffen the frame and this simple method with soldering up a model on your kitchen table makes it a breeze to get a hint about the torsional and structional stiffness of the frame, and makes it easy to see where a heavier tube or stiffening members would make the best work. The findings the author made, surprised him.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 26, 2014, 12:01:08 AM
I mean that with the limitations at hand (removable engine, jet exhaust etc etc) there is simply no room for any more alterations to the frame, so any findings using this method can only be met with a shrug and an "oh well".


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on March 26, 2014, 01:11:26 PM
a shrug and a "oh well", in my experience, usually costs a lot more financially the second time. moreso, if your wife is raising your baby by herself.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 26, 2014, 02:14:15 PM
a shrug and a "oh well", in my experience, usually costs a lot more financially the second time. moreso, if your wife is raising your baby by herself.


Just what are you getting at here? I can spend countless hours twisting soldered together copper wires without having a clue if that result has anything to do with my frame integrity, are you suggesting that if it folds in some particular way I should deem my bike frame unsafe and build a new one?

Iīve had this thread going for quite a while now and people have given me plenty of good advice which I have heeded (more or less), and experienced builders have had all the time in the world to tell me that I am on the wrong track with the frame build. Never heard anything so far.

If you are a tech inspector telling me straight out that this frame will never pass inspection for this and that reason, why then I would thank you, bow to your wisdom and follow your every lead. If a complete stranger insinuates that my frame will make my children fatherless without any explanation whatsoever I get rather pissed off for obvious reasons.

/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on March 26, 2014, 03:42:10 PM
a shrug and a "oh well", in my experience, usually costs a lot more financially the second time. moreso, if your wife is raising your baby by herself.


That was harsh and uncalled for
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on March 26, 2014, 03:52:43 PM
I think everything Andres is building is with a lot of planning and thought. He has asked and got suggestions on his build. I like his work and being a motor cycle it is limited for space. He has added two upper tubes and gussets to add strength. The finish fitting will tell how much room he has for any additional space there is for add ons. His detail and design is well done. I don't see reason to starting a Pissing contest. Keep up the good work and looking forward to seeing you on the salt. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on March 26, 2014, 04:08:38 PM
Uncalled for criticism by self appointed experts such as shown here is why I often use PMs rather than putting something out in the thread where it might be useful to others. This is an amazing build from a superb craftsman who is more than capable of making his own judgements on his projects.

Keep up the great work Anders!  :cheers: :cheers: :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on March 26, 2014, 09:02:47 PM
   Peter, Well said! I want to see it in person and shake Ander's hand for a job well done.
   Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on March 26, 2014, 09:37:46 PM
The parts that are bolted into the frame can also be used to give the assembly some stiffness.

This is a special construction machine that is quite a bit different than anything most of us have worked with.  It is hard to for me to say a whole lot about it except to make a suggestion.  That is to run it at less than its full speed potential at first, then to apply the power in stages.   This is what I do.  A possible way is to attend speedweek here in the US and to stay for BUB.  This has worked well for a lot of racers from Europe.  That few weeks between events can be used to do all sorts of work. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 26, 2014, 11:58:51 PM
Thank you very much for the encouraging words, since Iīve never built a bike frame before I am very thankful for all help I am getting here. :-)

The parts that are bolted into the frame can also be used to give the assembly some stiffness.

This is a special construction machine that is quite a bit different than anything most of us have worked with.  It is hard to for me to say a whole lot about it except to make a suggestion.  That is to run it at less than its full speed potential at first, then to apply the power in stages.   This is what I do.  A possible way is to attend speedweek here in the US and to stay for BUB.  This has worked well for a lot of racers from Europe.  That few weeks between events can be used to do all sorts of work. 

I will most certainly take it easy at first to sort the bike out at lower speeds before I try any full throttle runs, I plan to do lots of testing here in Sweden first so I am confident of both frame and engine before I take it abroad. I am painfully aware of the R&D involved in new projects so I will take it nice and slow to spot upcoming problems before I go fast enough to get myself into trouble.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 27, 2014, 12:11:29 AM
Last night I made the last handful of frame tubes and started welding the frame up.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011515.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011515.jpg.html)

I added three connecting tubes on each side of the central upper frame tube and one between the newly added upper frame tubes and the vertical frame tube that connects the upper and lower frame tubes. Dang hard to describe and I forgot to take any closeup pic of it but it can be seen in the fourth pic below if you look closely.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011516.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011516.jpg.html)

After that I removed the wheels and forks and lifted the bare frame up on a pair of stands to make welding easier, I havenīt weighed it yet but it feels like canīt weigh many kgs.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011517.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011517.jpg.html)

Some are probably wondering why I donīt use the frame jig while welding the frame. I chose not to because 80% of the frame already is welded so it should stay in shape pretty well, and I will still have to align the wheel axles by modifying the chain tension blocks for the rear wheel when I am done so it doesenīt matter if there is some minor movement in the frame now. Therefore I find it better that the frame can move freely than to build in tension in it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011518.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011518.jpg.html)

I hope tech inspection find the welds acceptable, I will take a bunch of pics before I paint the frame just to be on the safe side.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011519.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011519.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: RidgeRunner on March 27, 2014, 05:25:24 AM
     I'm no Structural Engineer but the frame looks a lot better now, nice improvements that look like they were part of the original plan.

     I also like the design of the stands, look like they will fold up neatly for storage yet remain plenty ridged for use.

                        Ed

     


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on March 27, 2014, 08:08:54 AM
Speaking of runs in ever increasing speeds, I'm positive that SCTA/BNI inspectors will REQUIRE you to do just that because not only of the newness of the bike -- but because of the non-traditional engine.  They'll want you to run, no problem there, but they also want proof that it'll be a safe run for you. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on March 27, 2014, 08:48:13 AM
a shrug and a "oh well", in my experience, usually costs a lot more financially the second time. moreso, if your wife is raising your baby by herself.


Just what are you getting at here? I can spend countless hours twisting soldered together copper wires without having a clue if that result has anything to do with my frame integrity, are you suggesting that if it folds in some particular way I should deem my bike frame unsafe and build a new one?

Iīve had this thread going for quite a while now and people have given me plenty of good advice which I have heeded (more or less), and experienced builders have had all the time in the world to tell me that I am on the wrong track with the frame build. Never heard anything so far.

If you are a tech inspector telling me straight out that this frame will never pass inspection for this and that reason, why then I would thank you, bow to your wisdom and follow your every lead. If a complete stranger insinuates that my frame will make my children fatherless without any explanation whatsoever I get rather pissed off for obvious reasons.

/Anders
I apologize. That did come out the wrong way.

Merely stating that any time i have left something at a shrug and a "oh well" it didnt come out as expected( i dont trust bikes, all my stuff has 4 wheels) I love the build and would love to see it run fast and hard. I was merely meaning, if you can do anything to avoid the shrug and "oh well", please do it. I have a baby girl too, and shudder at the thought of me not seeing her grow up. So i did sell my projects and am working on something cooler and slower.
I do know that speed is the ultimate test of a build, and i guess i misinterpreted the shrug and oh well as choosing to leave something to chance. Something that could be very important.

I have several lengths of 3/8" stainless tubing (or use brake line tubing) Something like that could better replicate a scale frame and maybe give you results you can see easier than with hard wire, and even be tig welded together.

Keep up the hard work! I am currently a keyboard racer and live vicariously through projects like this.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 27, 2014, 01:54:09 PM
Hi Jon,

You are probably right about that, I would only appreciate a couple of slow runs to get the feel of the salt track before going for a record. The engine will be tested and modified until it can be reliably do full throttle runs all day long as long as it has enough time to cool down between runs.

I will probably plan to stay for both BUB and Speed Week when I take the bike to the US so there should be plenty of opportunities to run it. :-)

I apologize. That did come out the wrong way.

Merely stating that any time i have left something at a shrug and a "oh well" it didnt come out as expected( i dont trust bikes, all my stuff has 4 wheels) I love the build and would love to see it run fast and hard. I was merely meaning, if you can do anything to avoid the shrug and "oh well", please do it. I have a baby girl too, and shudder at the thought of me not seeing her grow up. So i did sell my projects and am working on something cooler and slower.
I do know that speed is the ultimate test of a build, and i guess i misinterpreted the shrug and oh well as choosing to leave something to chance. Something that could be very important.

I have several lengths of 3/8" stainless tubing (or use brake line tubing) Something like that could better replicate a scale frame and maybe give you results you can see easier than with hard wire, and even be tig welded together.

Keep up the hard work! I am currently a keyboard racer and live vicariously through projects like this.


Hi Crackerman,

I sort of guessed that I misread your post, that is the biggest downside of internet communication. I can see now that my "shrug and oh well" statement sounds like I donīt give a Dodge but that is far from the truth, trying to break a land speed record is only fun if you live to brag about it in the pub afterwards.  :-)

Thanks for the encouraging words!

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 30, 2014, 02:49:58 PM
Iīve been welding the frame from time to time during the weekend so now it is only a couple of welds left, the rear fairing mounts and seat mounts are left to do but they donīt affect the frame stability.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011525.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011525.jpg.html)

Iīve also finished the winter mods on the daily driver, my Triumph Bonneville -67 that Iīve modified a tad. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Bonneville%20bobber/Bobbernklarliten1.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Bonneville%20bobber/Bobbernklarliten1.jpg.html)

I weighed the frame to see how heavy it has become, 16.5kg with the triple tree still in place in the steering head. Not bad. The scale is a bit funny since it begins at 80kg, that is why it looks like it weighs almost 100kg...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011527.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011527.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on March 30, 2014, 11:14:43 PM
Weight is not as big of a factor for land speed racing as it is for the other forms of bike competition.  That is not really heavy for a frame of its length.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 31, 2014, 05:17:31 AM
I know, it is just that I really would like to get a 1:1 power to weight factor or better. Looking good so far as long as I can get the calculated power out the engine. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 01, 2014, 03:35:58 PM
(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011531.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011531.jpg.html)

Got some photos taken today so I can see how I need to make the rear fairings, Iīll make a fairing plug out of styrofoam next.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011530.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011530.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on April 01, 2014, 03:58:35 PM
 you may not like decelerating with all your weight so far forward.

any way to stretch out on the frame with your feet by the rear axle ?

Bf262


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on April 01, 2014, 10:09:46 PM
Those forks look a lot better than the original ones you had.  The forks can be shortened by using a shorter top spring and putting a second spring on the damper rod so they do not extend all of the way out.  An advantage of this method is it increases the overlap between the top and bottom tubes and as a consequence, the fork rigidity.

 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 02, 2014, 11:02:16 AM
you may not like decelerating with all your weight so far forward.

any way to stretch out on the frame with your feet by the rear axle ?

Bf262

Unfortunately not, the jet exhaust is right behind where my feet are placed.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 02, 2014, 11:04:25 AM
Those forks look a lot better than the original ones you had.  The forks can be shortened by using a shorter top spring and putting a second spring on the damper rod so they do not extend all of the way out.  An advantage of this method is it increases the overlap between the top and bottom tubes and as a consequence, the fork rigidity.

I found this walkthrough on how to shorten a Hayabusa fork, fit a sleeve under the piston and cut the spring spacer almost as much.

http://www.suzukihayabusa.org/forum/index.php?topic=135724.0 (http://www.suzukihayabusa.org/forum/index.php?topic=135724.0)


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on April 02, 2014, 03:24:22 PM
Very simple and effective method , you can tailor it with preload from either direction esp to reduce lift under load or speed
I have restricted my travel to 50mm , 35 left in compression and 15 for lift,


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 04, 2014, 03:43:54 PM
The GSXR SRAD fork is a bit different from the hayabusa fork, found that out last night when I took it apart. I have to cut the inner tube and rethread it apparently.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011533.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011533.jpg.html)


Title: Re: APS/Ω Gas turbine bike build
Post by: JimL on April 05, 2014, 07:09:16 PM
Weight forward is good, and we are learning to put that weight a little higher, closer to the steering stem (must be the opposite at the rear of the bike).  I am moving my forward ballast higher, to try to reduce a very small "weave".  There is some good info out there that indicates 'too low' center of gravity forward reduces the inverted-pendulum effect that dampens weave at higher speeds.

The riders weight is not a good cantilever for this effect, because we are not very solid through our shoulders.  Back when I was racing sailboards, I learned the hard way that using your arms and shoulders to power the rig was much slower than "hooking in" to a harness that put the load through your lower back or hips.  Once I learned to "hook in" I quit losing so many races.  That effect is why my fixed ballast and components weights will be moved higher in the forward area of my bike.

Food for thought...I run very similar front forks but a different approach.  I use external stops on the lower legs.  They are set where there is contact (stopped) at rest, with me on the bike.  By the time my speed is above 100 or so, there is a little travel available (due to aero drag lifting the nose of the bike) and my forks are soft enough to absorb the ruts, holes, and the "river crossing" without kicking the front end.

I have tried running a front end with reduced length from shortening the extension (with the spring more preloaded).  I didnt like the feel of it....a lot of chatter in the front end.

With my current setup, when I roll off throttle at 150-160 the front end doesnt settle back onto the stops until about my turnout point.  It is very easy to feel when the bike settles back down.  The aero lift at top speed does not go away when you close the throttle....only when you get slower ( even when the throttle is off.)

I suspect you will have no engine braking.  I prevent engine braking by staying in top gear until very low rpm, before shifting down for a turnout.  It feels more stable to let aero drag do all of the high speed deceleration, and save the engine braking for later.  My son and I have both found this a comfortable way to run the bike.

We all love following your project and really appreciate the time you put into sharing it with us.

Thank you,
JimL


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 06, 2014, 05:58:58 AM
Weight forward is good, and we are learning to put that weight a little higher, closer to the steering stem (must be the opposite at the rear of the bike).  I am moving my forward ballast higher, to try to reduce a very small "weave".  There is some good info out there that indicates 'too low' center of gravity forward reduces the inverted-pendulum effect that dampens weave at higher speeds.

The riders weight is not a good cantilever for this effect, because we are not very solid through our shoulders.  Back when I was racing sailboards, I learned the hard way that using your arms and shoulders to power the rig was much slower than "hooking in" to a harness that put the load through your lower back or hips.  Once I learned to "hook in" I quit losing so many races.  That effect is why my fixed ballast and components weights will be moved higher in the forward area of my bike.

Food for thought...I run very similar front forks but a different approach.  I use external stops on the lower legs.  They are set where there is contact (stopped) at rest, with me on the bike.  By the time my speed is above 100 or so, there is a little travel available (due to aero drag lifting the nose of the bike) and my forks are soft enough to absorb the ruts, holes, and the "river crossing" without kicking the front end.

I have tried running a front end with reduced length from shortening the extension (with the spring more preloaded).  I didnt like the feel of it....a lot of chatter in the front end.

With my current setup, when I roll off throttle at 150-160 the front end doesnt settle back onto the stops until about my turnout point.  It is very easy to feel when the bike settles back down.  The aero lift at top speed does not go away when you close the throttle....only when you get slower ( even when the throttle is off.)

I suspect you will have no engine braking.  I prevent engine braking by staying in top gear until very low rpm, before shifting down for a turnout.  It feels more stable to let aero drag do all of the high speed deceleration, and save the engine braking for later.  My son and I have both found this a comfortable way to run the bike.

We all love following your project and really appreciate the time you put into sharing it with us.

Thank you,
JimL

Hi JimL,

Iīve been thinking about adding mounts for lead weights but decided that it is easy to make aluminum tube clamps if I find that I need to add weight somewhere on the bike.

I am not sure I follow you about your fork modification, are you strapping them down like the dragracers do?

I donīt know how much engine brake I will have, I suspect that at higher speeds it will be similar to the top gear in a normal motorcycle.

Thank you for your support! I am constantly humbled by the wealth of knowledge gathered here and canīt wait to become a fellow land racer instead of just another foreign wannabe with an unbloodied nose. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: RidgeRunner on April 06, 2014, 07:57:16 AM
   Why not use steel for the tube clamp ballast mounts?  No gain for saving weight there and material cost savings might buy an extra beverage of choice down the road sometime :-D

            Ed


Title: Re: APS/Ω Gas turbine bike build
Post by: JimL on April 06, 2014, 09:14:55 AM
I do not strap down the forks.  I just set up the final ride height and then limit the compression travel so I dont bottom my front fender into my streamlining.

I decided that I do not know more than the manufacturers about damping versus spring rate, so I run the forks stock at whatever the bike weight puts on them.  The engineers have already figured out what the damping should be at different compression levels, so wherever the forks are (stock) seems to work good.  That becomes very clear the first time you do hard braking on a modern sportbike and discover they keep steering well with the forks heavily loaded.

I just set up the height I want to run at, and then work on improving the aero to reduce front end lift under power.  Thats why I have to limit compression travel at low speed.  Simpler is better.

I was surprised to learn that some good research has proven that "too low" center-of-gravity near the steering head is a significant cause of high speed weave.  The report said that if the bike is not unstable at very low speed, it will weave at high speed.  I have lowered this bike twice over that last four years, and it has become much easier to push around by hand (less tendancy to flop over) and easier to drive off the line, BUT ....now it is beginning to require alternate pressure on the bars for the last two miles of a run.  It goes straight enough, at my low speeds, but it hasnt been staying exactly on the line I try for.

I suppose that explains why the sportbike engines keep getting moved higher and more forward as the bikes get faster.  This is an awkward trade off, because raising the bike makes the aero pull weight off the front wheel.  I have had the front end blow away at 150, before I started moving weight forward and lowering the bike, a few years ago.

Interesting , this trying to learn how to go faster. :-P


Title: Re: APS/Ω Gas turbine bike build
Post by: Ellwood on April 06, 2014, 12:36:09 PM

Hi, any idea when the first startup/run will be ? i would love to see it live.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 06, 2014, 03:23:33 PM
Ed: I like to work with aluminum, the difference in cost is neglectable and it wont ever rust on me so alloy it is.

JimL: The reason I need to shorten the forks is because my helmet will hit the top of the fork legs at speed position, you can see in the pic that I need to shorten them 5-6cm to get enough clearance. Iīll soon find out if the handling is affected by this, very interesting to read about your findings in this matter.

Ellwood: No idea, but I just got back from visiting the guy who will paint the frame for me so in two weeks or so it will have a nice black paint on it. I have some work cut out for me the next couple of weeks in other words, footpegs, seat, the mounts for the rear fairings and a couple of other stuff needs to be done by then.

With the frame painted and forks shortened I can start to assemble the bike again, so by the time summer arrives to the cold northern parts of Sweden it should be fairly ready for a test run. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on April 06, 2014, 04:39:05 PM
how much travel do you want ? , if you internally shorten (space them down) 50-60mm you will get your helmet clearance at your current ride height , if you take more you just get less suspension,

and if you adjust the preload up now , see how the forks react per mm  you get a better feeling of how much extra tube length to add

and you can fine tune it with the external adjuster later , also have a think about slightly heavier oil and less airgap as means of making the limited travel work as a package 


Title: Re: APS/Ω Gas turbine bike build
Post by: JimL on April 06, 2014, 08:47:32 PM
Anders, I am wondering how much you will have to slide them back down once your bike is up to weight?

I thought I was going to have to modify my FZR1000 forks, but after everything got stuffed in the chassis, I found it was good.  I notice that your bike is shorter front half than mine, so your position is more forward.

This might be a wait-and-see moment.

Regards, JimL


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 07, 2014, 03:05:28 PM
maj: I havenīt given the travel lenght much thought, I know that with the current fork position the bike is level with me on it and taking 50 or so mm off the travel leaves enough I recon. Tuning them with preload and different oil viscosity should result in a decent working fork.

JimL: Hmm, food for thought there. I have the forks apart already and really need to shorten them since I cannot strike a decent riding position with the helmet hitting the fork tubes as it is now. Perhaps I should settle with 40mm to begin with and go lower later if I find it necessary. Good pointer there Jim!


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on April 08, 2014, 04:06:37 PM
Anders:  Forgive me, but even for those from countries other than USA I tend to take my station as the comma cop seriously.  In your line "... travel leaves enough I recon. Tuning them with..." - - recon should be spelled "reckon", I believe.  Your command of the American version of English is outstanding, and that's why I'm pointing out such a minor error.  You're the envy of lots of Swedes -- and many Yankees, too.


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on April 08, 2014, 05:02:27 PM
Anders:  Forgive me, but even for those from countries other than USA I tend to take my station as the comma cop seriously.  In your line "... travel leaves enough I recon. Tuning them with..." - - recon should be spelled "reckon", I believe.  Your command of the American version of English is outstanding, and that's why I'm pointing out such a minor error.  You're the envy of lots of Swedes -- and many Yankees, too.

Jon, it's good that you have time to proof read some of us foriegn folks posts. I didn't realise (English spelling) that you spelled
length differently over on your side of the planet. Or did you miss that one  :evil:
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on April 08, 2014, 05:50:20 PM
I do use the British version for many words that include a "z" - such as "realise".  I do that on purpose just to mess with the minds of the readers.

As for "length" -- hunh?  I missed that one.  Where'd I do it? :?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 09, 2014, 01:13:54 AM
Anders:  Forgive me, but even for those from countries other than USA I tend to take my station as the comma cop seriously.  In your line "... travel leaves enough I recon. Tuning them with..." - - recon should be spelled "reckon", I believe.  Your command of the American version of English is outstanding, and that's why I'm pointing out such a minor error.  You're the envy of lots of Swedes -- and many Yankees, too.

No problems, thanks for pointing that out. I am fairly good at writing English but I am terrible at speaking it, I blame the school plus myself for spending all money on workshop projects instead of travelling around like many do.

I read a lot of English and American fantasy so that is probably where Iīve picked up most of it, you canīt avoid learning something while digging through 20.000-ish pages of Steven Eriksonīs "Malazan Book of the Fallen". :-)

A busy weekend coming up for me, my family heads off to my mother-in-law tonight so I will have almost a week to myself where most of it will be spent in the workshop getting the bike frame ready for painting. I also have to make the seat and a set of adjustable foot pegs so a couple of project updates should drop in over the next couple of days.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on April 09, 2014, 04:13:39 AM
maj: I havenīt given the travel lenght much thought, I know that with the current fork position the bike is level with me on it and taking 50 or so mm off the travel leaves enough I recon. Tuning them with preload and different oil viscosity should result in a decent working fork.


Jon, I don't want to go on at length about it
Anders, I struggle with writing, but I struggle even harder with being understood when I am in the USA.
They seem to think I'm from the south
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on April 09, 2014, 08:22:57 AM
G... You are from the south!

Anders, I would ask SSS about his command of languages other than English.... If'n he wants it all in perfect English he should install a spellin' and grammar program. 

I knew what you meant and that is all that is important when communicating. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on April 09, 2014, 09:41:26 AM
Anders and G. Slim just likes to as we Yanks say "pull your chain" :cheers:
G, Don't you live in south Texas? :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on April 09, 2014, 10:06:34 AM
All right, I did mean it.  A while back Lars -- the Dane - made a minor mistake with his English, and when I commented (PM) on it he thanked me a couple of times for helping him learn our language better.  And keeping that in mind - is why I offered a spelling check for Anders.  It's not like I'd give you You or Stainless, JB -- you two deserve a round of abuse - just on general principles, you understand.


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on April 09, 2014, 02:13:43 PM
All right, you understand.

Slim, Both my X 's would disagree :-P


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on April 09, 2014, 08:35:09 PM
Do your X's live in Texas?

     :evil: :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on April 09, 2014, 11:20:06 PM
No one in Pennsylvania and my favorite X lives in Arkansas. They both moved back home. I live in Denver so no problems :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on April 10, 2014, 04:17:48 AM
G, Don't you live in south Texas? :-D

To quote Tom Evans when someone (who's name might have been Bill) asked if I was from Arkansas.  "heck no, he's from way further south than that"
Which was good because I had no idea where Arkansas was
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 10, 2014, 04:33:01 AM
Hey guys, get a room. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on April 10, 2014, 05:06:00 AM
Hey guys, get a room. :-)
...



Title: Re: APS/Ω Gas turbine bike build
Post by: PorkPie on April 10, 2014, 05:16:35 AM
And keeping that in mind - is why I offered a spelling check for Anders. 

.....and this is the reason why you gave up with my bad English....... :-D :-D :-D :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 10, 2014, 04:12:05 PM
Iīve been busy with other stuff this week but now I have four days for myself since my family is away visiting my mother-in-law, expect daily updates this weekend in other words! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011534.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011534.jpg.html)

My plan for tonight was to make the footpegs, adjustable ones preferably so I can find a decent riding position.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011535.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011535.jpg.html)

This pin will lock the footpegs in place so they wonīt rotate or move sideways, donīt want them to fall out at >200km/h...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011536.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011536.jpg.html)

With that sorted I started working on the seat, earlier this week I cut out a rough template which I now transfered to a sheet of aluminum.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011537.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011537.jpg.html)

The aluminum sheet got a 90° radius so that I can have something to rest my behind against.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011538.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011538.jpg.html)

Hmm, this doesenīt look cosy at all. What if I cut some material away?

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011539.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011539.jpg.html)

Now we are getting somewhere! I started making the rear mount for the seat which is secured with the same bolts that hold the battery box.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011540.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011540.jpg.html)

I could have welded the mount tonight if this familiar sight hadnīt met me when I looked at the argon regulator....

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011541.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011541.jpg.html)

No biggie, Iīll fill the argon bottle after work tomorrow and get back at it.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on April 11, 2014, 08:41:47 AM
Anders, good to see you figured out how to get your thread back on track... I think your scooter is a cool piece.  Nice pics, keep up the good work  8-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 11, 2014, 04:06:13 PM
Thanks! :-)

I had a bad feeling this morning so I went to the shed before going to work and test fitted the engine, and just like I suspected the inter turbine section hit the footpeg. No big deal though, I rebuilt them after work and it turned out like this.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011542.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011542.jpg.html)

I had to remove the position furthest back but it feels perfectly ok the way they are now, switching them upside down makes them fit the front position as you can see.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011543.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011543.jpg.html)

With that hiccup taken care of I continued with the seat now that I had a full bottle of Argon again, I welded the rear mount and added a central support plate so it wonīt flex and eventually crack the welds.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011545.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011545.jpg.html)

Finding the right profile for the back of the seat required some *cough* advanced 3D rendering. :-D

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011546.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011546.jpg.html)

With the radius cut out I made an edge on the slip rollers where the rear fairing will start.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011547.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011547.jpg.html)

Welded.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011548.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011548.jpg.html)

As you can see I have made some ergonomical alterations to the seat (bashed it a few times with a rubber hammer) so now it is very comfortable to sit on, a 10mm thick sheet of foam used for race track bike seats arrived today so the pair of nuts on the front mount wonīt rub against my own pair. :-o

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011549.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011549.jpg.html)

Another angle, everything seems to fit like it should so I am satisfied. I have used the 100cm scale to get a feeling on how to profile the rear fairing and if I can make it the way I want it will look pretty sweet.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011550.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011550.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on April 11, 2014, 09:34:06 PM
  Anders, You need to get with Mike [Springfield Flyer] when you are ready to get the body parts going. A master of Carbon and glass.
     Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 12, 2014, 02:22:29 PM
I havenīt decided whether I should try to make the rear fairing from aluminum sheet or glass fiber, but Iīll probably end up making a styrofoam plug and cast a glass fiber fairing since sheet metal working at this scale wonīt be easy without an english wheel and a can full of experience.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011552.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011552.jpg.html)

The frame is sanded down and ready for being taken to the painter tomorrow! Another mile stone for this project!  :lol:

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on April 12, 2014, 02:55:03 PM
Looking closer everyday. We are all loving your build. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 12, 2014, 03:48:36 PM
Thank you very much Glen, I am just glad to be here amongst you guys. Hopefully I will be able to share a beer with some of you at Speed Week a few years from now. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 14, 2014, 04:19:46 PM
The frame is being painted as I am writing this, just got an MMS from the painter.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Johanlackar.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/Johanlackar.jpg.html)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 15, 2014, 03:08:13 PM
Picked up the frame an hour ago, it looks very good!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011553.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011553.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011554.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011554.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on April 15, 2014, 09:45:36 PM
It is looking good, Anders. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 16, 2014, 04:47:35 AM
The worst part is that I need to make the rest of the bike look just as good...

In little over a month the bike will be displayed at a local car and motorcycle exhibition, so I need to have it mocked up by then.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 17, 2014, 12:21:24 PM
The ceramic bearings for the wheels and gearbox arrived today, but now it is easter holiday and three cosy days at my parents place with the families of myself and my brother so Iīll deal with the bearings next week.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/c07eab9d-6f22-4557-9db1-0a1522eafbe6.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/c07eab9d-6f22-4557-9db1-0a1522eafbe6.jpg.html)

Cheers and happy holiday!!!!!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on April 17, 2014, 02:04:32 PM
Enjoy the holiday Anders. You've definitely earned the break.  :cheers: :cheers: :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 17, 2014, 03:53:08 PM
Thanks Peter!

By the way Iīve started to build a gas turbine powered outboard motor, we have a local fishing contest that we aim to attend with this engine and a pair of sailor suits this summer... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Turboshaft%20aktersnurra/startingjohnsonars.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Turboshaft%20aktersnurra/startingjohnsonars.jpg.html)

My bike engine and my boat engine, a bit of a size difference.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra2.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra2.jpg.html)

The newly built engine casing, 1.5mm stainless instead of the original 0.5mm.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra6.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra6.jpg.html)

The engine in its test stand.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra8.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra8.jpg.html)

Turning the power turbine shaft down to size.
(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra11.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra11.jpg.html)

Power turbine ready with bearings, sleeve and primary chain sprocket.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra13.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Turboshaft%20aktersnurra/Aktersnurra13.jpg.html)

I hope I am not venturing too far away from the original topic, if so please say so and I will keep to the bike updates from now on.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on April 17, 2014, 04:15:05 PM
Be as broad as you want, its your thread and its interesting  :cheers:

Have a happy Easter


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on April 17, 2014, 08:29:10 PM
   Love it, Anders.
   Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on April 18, 2014, 10:20:33 AM
Your projects are so interesting, lots of cool ideas and super craftsmanship.  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 18, 2014, 01:40:13 PM
Good to hear, I have lots of minor projects that might interest you guys so I will show you some of them when time permits.  :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on April 21, 2014, 04:41:44 PM
Good to hear, I have lots of minor projects that might interest you guys so I will show you some of them when time permits.  :-)

I don't think I'll live long enough to complete even half the projects I have lined up
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 21, 2014, 11:12:33 PM
I second that, it is a bit annoying to hear lazy people complain that they have nothing to do when you would need 48h each day to complete half of the projects you would like to do...


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on April 22, 2014, 06:03:27 AM
Perhaps one of those small turbines for my Heinkel Tourist?
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 23, 2014, 11:18:25 PM
That would be interesting for sure. :-)

Now when the holidays are over I found time to start working on the gearbox, I fitted the gas producer to the frame to free up some space on the work bench and it looks like it has found a good home. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011555.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011555.jpg.html)

Taking the power turbine section apart to get to the gearbox.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011556.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011556.jpg.html)

Here you can see the output shaft gear...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011557.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011557.jpg.html)

...and here is the input shaft housing, now you have seen the two spots in the gearbox that is a bit tricky to lubricate properly.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011558.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011558.jpg.html)

I spent over an hour staring at the parts trying to figure out a way to do this, I have had discussions with John and the way we decided then was to direct a jet of lube on each input bearing and one directly into the gear mesh but looking at it now that wonīt be easy to do.

I would either have to bleed oil from the main pump and connect the gearbox and oil tank somehow or fit yet another oil pump to the bike and run a closed loop inside the gearbox, but since I already have four pumps running from the battery Iīd rather not do that.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011559.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011559.jpg.html)

I came up with a bit of a special solution for now, I will run a wet sump that will keep the <5000rpm output shaft and bearings lubricated and route bleed air through an oil mist lubricator (used for lubricating pneumatic tools) and into the input shaft tunnel between the bearings. The hybrid bearings donīt need much oil and the bleed air will cool them and provide an air flow that will keep the exhaust gasses from entering the shaft tunnel.

All I need to do is trim the oil flow and keep a close watch on the oil level in the oil mist lubricator so it wonīt run dry but that will only be another point on the pre run check list. Iīll inspect the gear mesh and bearings after the first couple of runs to check for signs of oil starvation and wear, if it shows any signs of damage I will simply have to rethink. This is the easiest way of doing it and I like easy. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on April 24, 2014, 10:48:44 AM
I love this build but if I said I understand I'd be lying.

Anders, you're going to say it's not that complicated now aren't you?. :-D :-D

Too cool. Great workmanship. Thanks man.


Title: Re: APS/Ω Gas turbine bike build
Post by: Rex Schimmer on April 25, 2014, 01:21:44 PM
Anders,
You have made the right choice in going with the mist lube for your bearings, this is how high speed (10,000 rpm+) spindles are lubed also glad to see you are not squirting oil on the gear mesh, when you direct the oil into the point where the gears mesh you will make the gears into not very efficient oil pumps that will develop high temperatures and high drag. Best high speed gear lube is having a mist of oil directed at the gear after the mesh.

Love your project!

Rex


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 25, 2014, 03:03:19 PM
Hi Rex,

Good to hear that, the idea right now is to lube the gears and the output shaft bearings with a wet sump. I have no idea but it feels like the 5000rpm output gear will be able to keep the oil stuck to it all the way around to the pinion gear, please correct me if I am wrong though.

If the mist oiler turns out well I might convert the entire gearbox to mist lubrication but for now I will have to cut some corners to have it ready for a road test this summer.

Yesterday the M12x1.0 die I ordered a couple of weeks ago arrived so I could finish lowering the fork legs.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011560.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011560.jpg.html)

I shortened them 6cm which feels about right, this particular fork needs to have the inner damper tube cut and rethreaded when the Hayabusa forks and others only needs to have the spring spacers replaced.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011561.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011561.jpg.html)

One leg done, one to go.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011562.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011562.jpg.html)

I took the frame outside a while ago to get some decent pictures of it, looks a bit high now without the underhung oil and kerosine tanks.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011563.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011563.jpg.html)

I fitted the gas producer just for the fun of it, I can almost hear it moan "polish me, polish meeeeeeeee......"

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011564.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011564.jpg.html)

I canīt say that the frame is very wide, the widest part of the bike while riding will probably be my smile. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011566.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011566.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on April 25, 2014, 03:42:42 PM
Love it, great work. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 25, 2014, 03:47:49 PM
Thanks Glen! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on April 25, 2014, 06:48:05 PM
Beautiful Anders! It's amazing what a little paint can do. I love the reinforced backbone on the bike. Looking forward to more!  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on April 25, 2014, 09:14:10 PM
They say if it looks right, it goes right and that looks great. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 26, 2014, 03:14:48 AM
Thank you very much! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Rasmussen on April 26, 2014, 07:06:27 AM
Looks real good Anders :-)

I`ve been thinking about this since you posted it, probably a stupid question, but just have to ask: what happens to the air, that is blown into the gearbox to carry the oilmist? It must require quite some deairation device somewhere, not? :?
Love the idea, but can`t really figure that out. But, then again I only understand less than half of how this thing works :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 26, 2014, 10:06:02 AM
Thanks Rasmussen!

A good question, I will have a large breather on the gearbox to avoid any pressure build up inside that will push out the output shaft seals.

/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 27, 2014, 04:48:53 PM
After a couple of test ejectors built I have found that they need a large pressure drop to work, the ones Iīve built work just fine until I connect the length of tube that will connect it to the bearing tunnel and then the ejector stops pulling oil.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011567.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011567.jpg.html)

With that figured out I have decided to use the industrial mist oiler after all, the only downside is the plastic internals that wonīt take the heat of the bleed air at full throttle but a simple heat sink like a coil of copper tubing should take care of that.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011568.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011568.jpg.html)

I fitted a hydraulic coupling to the bearing tunnel and tested it at 2 bar air pressure with OKQ8 Wagner 68 gear oil, works like a charm and the amount of oil is fully adjustable on the mist oiler so I think this will work. One other great thing is that a new one can be bought cheap off the shelf in case this one fails me, not a bad thing to have a couple in store when going over seas. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011569.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011569.jpg.html)

Here you can see the entry hole for the air/oil into the bearing tunnel.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011570.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011570.jpg.html)

I have to modify the exhaust pipe somewhat since the coupling hits it when I assemble the parts, after that I can start assembling the gearbox with the new ceramic bearings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011571.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011571.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 29, 2014, 04:44:10 PM
I spent a couple of hours on the power turbine today.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011572.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011572.jpg.html)

The exhaust housing hit the fitting on the shaft tunnel for the oil/air mix so I had to modify it somewhat to get some clearance.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011573.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011573.jpg.html)

Then I assembled the input shaft housing to simulate a static condition to see if it still would flow oil with the real life air restriction through the bearings, and to my great relief it transported a good amount of oil to the shaft tunnel and after a little while the oil had pooled up to the point that it reaches the ball races.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011575.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011575.jpg.html)

This was at only 2bar air pressure so I will have even better air flow in real life since the P2 will be close to 3bar when racing. I am aware that this is only a static test so I have no idea how it will work with the bearings spinning, but I guess there is only one way to find out. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011574.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011574.jpg.html)

I am also painfully aware of that this solution is far from optimal, but I am cramped both of space and battery capacity and it is by far the easiest way with the least modifications to the gearbox so I will give it a try before I add high pressure lube jets and such.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 02, 2014, 03:43:49 PM
With the oiling hopefully sorted out it was time to get the gearbox painted, my father is visiting this weekend and helped me with masking the gearbox and taking some pictures.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011576.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011576.jpg.html)

After some sand blasting and degreasing I started painting the gearbox, 180°C engine block paint should withstand the radiant heat from the power turbine exhaust.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011577.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011577.jpg.html)

One layer of paint done, Iīll get up early tomorrow and put another on it. Black brush paint seldom turns out pretty in the daylight but what matters is that it wonīt rust.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011579.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011579.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on May 02, 2014, 04:55:25 PM
   POR 15 brushes on nicely and is pretty heat resistant and just about bullet proof.
     Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 03, 2014, 03:27:29 PM
This paint was also very easy to work with, a bit dusty in the workshop unfortunately but after all this is a race bike and no Dodge exhibition bike.  :-)

I made a bracket for the oil dribbler just now, it sits snugly between the seat and the battery.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011580.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011580.jpg.html)

Now it was about time to start modelling the rear fender, I will use styrofoam blocks to make the plug and then cast glass fiber on it. A hot wire cutter is used to get a rough shape on the blocks and I will then sand the assembled fender to its final shape.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011581.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011581.jpg.html)

I only had material for two blocks so I have to go shopping next week. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011582.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011582.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on May 03, 2014, 09:31:31 PM
Anders, if you can, its a good idea to put the front fender on the bike along with the fairing before you shape the tail.  have someone take pictures of you on the bike from the front, back, and sides.  Carefully look at the pictures.  This will help you to shape the tail to blend in with you and the front part of the bike. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 03, 2014, 11:14:48 PM
I have a couple of pics with me on the bike which Iīll use to figure out the overall shape, Iīll try to find a smooth curve from the front of the bike all the way to the rear without sacrificing too much of the rider-less look of the bike.

I also have to make room for the spiked rear tire Iīll use for the ice lake racing, at least 7 cm clearance is needed due to the spike length and tire growth at speed.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on May 04, 2014, 02:33:37 PM
If it were me, I'd put armor plate between my butt and those rear tire spikes flying by at high speed!  :-D

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on May 04, 2014, 06:07:37 PM
Anders, the team go dog go build diary shows how pictures are used to figure out the tail.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 04, 2014, 11:07:48 PM
Neil: A set of steel plates would certainly make me sleep better at night, weīll see if I can fit some once the rest of the tail is built.

Anders, the team go dog go build diary shows how pictures are used to figure out the tail.   

Iīll take a look, thanks for the hint!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 06, 2014, 12:41:09 PM
Last night I assembled the gearbox, here the parts are cleaned and ready to be fitted together.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011583.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011583.jpg.html)

The housing was cleaned as well and copper washers were fitted behind the oil plugs, the triumph Plymouth oil for both of them I there is no need for this one to leak as well.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011584.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011584.jpg.html)

Over the years I have made a bucket full of special tools for assembly and disassembly of the engine, here is one for fitting the rear bearing to the pinion shaft.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011585.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011585.jpg.html)

Here both shafts are in place in the gearbox with the new ceramic bearings fitted.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011586.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011586.jpg.html)

The turbine bolt lock is kind of special, a 2mm stainless wire is inserted in a hole drilled through both the insex bolt head and the turbine nut flange. Locking washers or Locktite is a bit no no for this since dropping the turbine wheel at 32.000rpm would be a bad idea... :-o

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011587.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011587.jpg.html)

I used a cylindrical punch to make a dent in the wire inside the insex head so it is locked in place, then the ends were bent outside the flange as well so now I consider the turbine wheel secured beyond all doubt.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011588.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011588.jpg.html)

The whole power turbine section assembled, hopefully it will stay that way the rest of the year as well.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011589.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011589.jpg.html)

After that I could fit the engine in the frame, it looks much better now with some paint on the frame and gearbox.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011590.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011590.jpg.html)

Next up is to flush the gearbox internals with kerosine to get rid of the last bit of bearing grease and any eventual particles that got in there during assembly, will get to that later this week.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011592.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011592.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on May 06, 2014, 12:58:12 PM
Looks fantastic Anders, as always  :cheers:

I'm sorry if you've explained this already, but where will the hot exhaust be directed? I was watching the videos from Iceweek posted on another thread, and the heat was intense. Is this the same sort of engine design?

best,
Dean


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 06, 2014, 01:28:43 PM
Hi Dean and thanks!

No, in the ice racing we use afterburning jet engines which would melt both the rear tire and wheel if used on the motorcycle.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Jetsparken-2.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Jetsparken-2.jpg.html)

The engine Iīve built for the bike is a turboshaft engine just like the ones in helicopters, the jet exhaust is directed through a secondary turbine stage where it spends all its energy and then simply exits the engine through exhaust ports on each side as you can see in the picture below.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011591.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011591.jpg.html)

I will fit extensions to the exhausts later when the rear fairing is built, I need to get the 3-400°C exhaust jet away from the fairings to avoid melting them or at least burning the paint.

I hope my explanation was helpful, thanks for watching! :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on May 06, 2014, 02:15:59 PM
That makes sense, thanks for the explanation. cheers, Dean


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 06, 2014, 03:24:03 PM
You are welcome. :-)

To avoid two hours of Eurovision Song Festival I sneaked out to the shed and flushed the gearbox just now, it rotates much freer now after being spun up with kerosine in the sump so I assume the grease is gone now.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011593.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011593.jpg.html)

I noticed that a fair bit of the kero leaked into the exhaust scroll through the power turbine shaft seal, but the very small amount of oil used later should keep any smoke in the exhaust to a minimum. If it turns out to be a problem I just got a set of piston ring seals that I ordered just in case that would happen.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 09, 2014, 01:08:22 PM
Assembling the bike for a car/bike show two weeks from now, we will have our own space with the twinturbo jet kick and my turbine bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011594.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011594.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011595.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011595.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011596.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011596.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011597.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011597.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 10, 2014, 09:13:51 PM
You are welcome. :-)

To avoid two hours of Eurovision Song Festival

Cheers!
/Anders

We get it for twelve hours on tv on the other side of the planet
G


Title: Re: APS/Ω Gas turbine bike build
Post by: salt27 on May 10, 2014, 09:30:38 PM
You are welcome. :-)

To avoid two hours of Eurovision Song Festival

Cheers!
/Anders

We get it for twelve hours on tv on the other side of the planet
G


So now we know what Goggs has been preoccupied with. (fashion tips)   :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 11, 2014, 04:02:58 PM
I continued getting the bike ready for the bike show, the rear wheel got a set of ceramic bearings and a wipe with an acetone rag to get the worst of the dried in chain lubricant off it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011598.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011598.jpg.html)

I also did some more work on the rear fender to make it more visible just what the bike will look like when finished.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011599.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011599.jpg.html)

The clearance for the tire is slightly more than 5cm, no risk that the tire will expand and hit it at speed. When I run with spiked tires I`ll have a metal fender to keep the spikes from coming lose and opening up a couple of new holes in my body...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011600.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011600.jpg.html)

The idea is to narrow it down further back so that it will have a slim ending, I have a clear picture of the finished result in my head and I hope that I can make the fender look anything like it. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011601.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011601.jpg.html)

With the front fender and fairings in place it looks like the lines are ok, I am tempted to cut a bit from the fairing sides to make the entire engine accessible without having to remove the plastic.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011602.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011602.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Koncretekid on May 11, 2014, 08:20:12 PM
"When I run with spiked tires I`ll have a metal fender to keep the spikes from coming lose and opening up a couple of new holes in my body...

Methinks you already have some loose screws! :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on May 11, 2014, 08:47:02 PM
Love the updates, thanks. You are really progressing daily.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on May 11, 2014, 09:45:34 PM
Anders, do not forget to put on your chain guard.  The various sanctioning organizations have different rules.  It is not hard to make a guard that is legal in all. - Bo


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 12, 2014, 11:53:21 AM
"When I run with spiked tires I`ll have a metal fender to keep the spikes from coming lose and opening up a couple of new holes in my body...

Methinks you already have some loose screws! :-D


 :-D

Love the updates, thanks. You are really progressing daily.

Thank you Glen!

Things are coming together nicely so far and with the bike show two weeks from now out of the way I will seize all effort on the rear fender to get the bike ready for a road test, I have all winter to get the fairings and other stuff done so while the roads are bare I will try to get as much seat time as possible out of it.

Anders, do not forget to put on your chain guard.  The various sanctioning organizations have different rules.  It is not hard to make a guard that is legal in all. - Bo

I just checked the 2014 SCTA rule book that Edstuga-Anders (http://www.edstugaanders.blogspot.se/) very kindly sent me, and I think Iīll make one out of aluminum and bolt it to the gearbox and the rear fender mount.

You made an important point Bo that I have to make the bike meet regulations for all organizations so I can race at all events without having to modify the bike, Iīll keep that in mind during the construction of the fairings.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 14, 2014, 05:12:36 AM
"When I run with spiked tires I`ll have a metal fender to keep the spikes from coming lose and opening up a couple of new holes in my body...

Methinks you already have some loose screws! :-D


Just lock wire them :cheers:
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 14, 2014, 05:14:28 PM
Tonight I made the mounting brackets for the front fender, feels sturdy so itīll do.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011603.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011603.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on May 14, 2014, 08:46:13 PM
Anders, that looks like a motorcycle now!.

Great stuff. :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 15, 2014, 02:41:31 AM
Anders, that looks like a motorcycle now!.

Great stuff. :cheers: :cheers:

Thanks, now if I can only trim the fairings a bit so the sides follow the front fender curve it will look even better I think... :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 15, 2014, 01:57:31 PM
I removed some stuff from the triple tree last night, earlier the ignition lock holder blocked the sight of the exhaust temp gauge.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011604.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011604.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on May 15, 2014, 11:39:04 PM
That looks like all you need. Shweet. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 16, 2014, 12:23:13 AM
Are there any regulations against modifying the triple tree? I need to drill a couple of small holes through the one in the pic above to secure a small dashboard with some switches and indication lights, will the tech inspection have any objections do you think?

I cannot see that a pair of 6mm holes would have any effect of the structural integrity, but if the inspector thinks so I am in trouble.


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 16, 2014, 09:43:58 AM
APS/Ω bike
do pretty much whatever you want
http://www.scta-bni.org/pdf/2014/2014%20Motorcycle%20Inspection%20Form.pdf
as long as you can look at the left side of this form
and tick stuff off with a "yes that's ok"
it shouldn't be a problem
G


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on May 16, 2014, 10:09:25 AM
Lots of trees already have threaded holes in them. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 16, 2014, 10:27:52 AM
APS/Ω bike
do pretty much whatever you want
http://www.scta-bni.org/pdf/2014/2014%20Motorcycle%20Inspection%20Form.pdf
as long as you can look at the left side of this form
and tick stuff off with a "yes that's ok"
it shouldn't be a problem
G

Thanks a million for the inspection form! Now I know for sure what the tech guys will look at, excellent! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on May 16, 2014, 10:44:51 AM
Tonight I made the mounting brackets for the front fender, feels sturdy so itīll do.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011603.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011603.jpg.html)

Cheers!
/Anders

It's hard to tell from the angle of this photo, but does the leading edge of the front fender extend below the height of the axle? If so, you'll need to trim it for the SCTA.

Looks great Anders :)

Dean


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 16, 2014, 12:58:41 PM
Iīve only cut it to a rough shape so far, I think I need to trim it some to be on the safe side.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 16, 2014, 03:17:19 PM
Iīve had a hard time deciding what to do with the side panels on the front fairing, they are badly secured to they will be all over the place once the bike starts gaining speed and frankly they look like crap so something radical had to be done.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011605.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011605.jpg.html)

The idea was to make them follow the lines of the front fender and the vertical frame tubes, with a pair of detachable side panels that cover the entire sides of the bike I will have easy access to the engine without having to remove the entire front fairing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011606.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011606.jpg.html)

It turned out pretty ok in my opinion, the final shaping will be done before I paint it so until then this will do.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011608.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011608.jpg.html)

A quick look at the front shows that the bike will have a very small frontal area, and I should be able to tuck my knees in far enough to stay out of the wind I think. Not easy to judge when you are alone in the workshop. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011609.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011609.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on May 16, 2014, 04:32:44 PM
Anders, it is looking soooooo good!  :cheers: :cheers: :cheers:

You have the eye of an artist.

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 16, 2014, 06:56:31 PM
Get some one to take a picture of you , with all your gear on , sitting on your bike.
Then you will have a better idea what you have to cover
I was watching a youtube clip where on of our DLRA guys had one of his friends video him on the bike moving


G


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on May 16, 2014, 08:47:29 PM
The spot on the triple clamp halfway between the fork tube and the steering stem, and halfway between the front and back of the clamp, is often the least stressed part and the place to drill a hole.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 16, 2014, 10:57:52 PM
Anders, it is looking soooooo good!  :cheers: :cheers: :cheers:

You have the eye of an artist.

Pete

Thank you very much Pete. Unfortunately I donīt always have the patience to get the finer details right, that is probably one of the reason why I am building a race bike instead of a trailer queen show bike. :-)

Get some one to take a picture of you , with all your gear on , sitting on your bike.
Then you will have a better idea what you have to cover
I was watching a youtube clip where on of our DLRA guys had one of his friends video him on the bike moving
G

I will try to persuade some neighbor passing by to take a couple of pictures once the weather starts getting better. I drove my Triumph to work 25km from home a couple of days ago, on my way there the temp was -1°C and on my way back home it was raining. I canīt believe I managed to cover the entire span of Swedish motorcycling weather in just one day...

The spot on the triple clamp halfway between the fork tube and the steering stem, and halfway between the front and back of the clamp, is often the least stressed part and the place to drill a hole.

Thanks, Iīll try to keep the holes to that location.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on May 16, 2014, 11:03:36 PM
I see you're also up early Anders?.

How's the Swedish coffee?.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 16, 2014, 11:09:55 PM
Ha ha, I am actually enjoying my second cup of coffee thank you. Our 2-year old daughter is an early bird so Iīve been up since 05:30 this morning. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on May 17, 2014, 08:45:34 AM
For the sake of the discussion, in what time zone are you located?  How 'bout if you reference it to Greenwich time to make it easy for all of us 'round the world to translate to our local?  We're in the Zulu -5 hours zone - save that during the summer we go on "Daylight Saving Time" and we're only 4 hours behind Zulu.


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on May 17, 2014, 09:31:41 AM
Jon, I'm at GMT+02:00


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 17, 2014, 09:45:53 AM
I am also at GMT+02:00


Title: Re: APS/Ω Gas turbine bike build
Post by: salt27 on May 17, 2014, 10:00:13 AM
GMT-7:00 for me.


Title: Re: APS/Ω Gas turbine bike build
Post by: Ellwood on May 17, 2014, 10:56:26 AM
GMT + 1 Anders.  8-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 17, 2014, 11:22:16 AM
GMT + 1 Anders.  8-)

Is it? Oh well. :-)

On a side note I won "Best European Motorcycle" with my Bonneville today at Springmeet Östersund, around 1000 custom cars and bikes so plenty of competition.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Bonneville%20bobber/PokalSpringmeet2.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Bonneville%20bobber/PokalSpringmeet2.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Bonneville%20bobber/PokalSpringmeet3.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Bonneville%20bobber/PokalSpringmeet3.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on May 17, 2014, 11:38:50 AM
Corngratulations on winning the award.  When I look at the photos I think "Minimalist"!  Not  much there other than what's absolutely necessary.  Great looking work, Anders. :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 17, 2014, 02:13:30 PM
Corngratulations on winning the award.  When I look at the photos I think "Minimalist"!  Not  much there other than what's absolutely necessary.  Great looking work, Anders. :cheers: :cheers:

Thanks! My behind gets a bit wet when raining but I can live with it, fenders is for sissies. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on May 17, 2014, 03:57:20 PM
Don't try riding on a gravel road without a rear fender, Anders.  :-D

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on May 18, 2014, 12:58:39 AM
Anders, one of those full length mirrors like the ladies use, leaning against the wall, will allow you to look at yourself when you are on the bike.   


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on May 18, 2014, 03:36:39 AM
Hey Anders, I also build/built bikes but not so much anymore.

That bobber is very nice.
The Trumps always look great and what I wouldn't do for that front drum!!!!!! :-D
I love them.

Congrats on the win. It's never easy.

Mike.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 19, 2014, 03:22:27 PM
Don't try riding on a gravel road without a rear fender, Anders.  :-D

Regards, Neil  Tucson, AZ

Luckily I donīt have many gravel roads around here, but Iīve tried it and it is not too bad unless itīs recently been raining...

Anders, one of those full length mirrors like the ladies use, leaning against the wall, will allow you to look at yourself when you are on the bike.   

That would work, but with the memory of a gold fish a photo is better. :-)

Hey Anders, I also build/built bikes but not so much anymore.

That bobber is very nice.
The Trumps always look great and what I wouldn't do for that front drum!!!!!! :-D
I love them.

Congrats on the win. It's never easy.

Mike.

Thanks Mike!


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on May 19, 2014, 03:27:53 PM
Anders;

Most off-road bike tires pick up small pieces of gravel in their coarse tread and then centrifugal force throws them off with some velocity. It feels like your backside is getting peppered  :-D

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on May 19, 2014, 10:48:36 PM
Neil, the front is the bad one. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on May 20, 2014, 12:33:47 AM
 :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 22, 2014, 06:08:51 PM
The state I live in, Mudguards are required by law, and they are required to come down in a line 45° thru the axle
The Police here will take a bike off the road for that sort of "dangerous" modification
G


Title: Re: APS/Ω Gas turbine bike build
Post by: generatorshovel on May 22, 2014, 06:16:08 PM
Do dirt bikes come with an exemption Grumm ? , I've yet to see a "legal" dirt bike rear 'guard.
I got to edumakate a RTA inspector in '70 while getting a '42 HD thru rego, he made me plonk my butt on the seat as he checked the mudguard was within specs,,he would'nt have it that, being a rigid frame, sitting on the bike made buggerall difference  :-o
Tiny


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 26, 2014, 02:38:13 PM
Back from the motor show, it was loads of fun but a bit tiring to stand up for two whole days, sleep little and drink a couple of beers each night.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Motorma3080ssan1.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Motorma3080ssan1.jpg.html)

I didnīt take any pics during the time there was visitors, but it was very crowded from time to time. Many familiar faces dropped by and a whole bunch of new ones with interesting stories to tell, a very fun weekend indeed!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Motorma3080ssan2.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Motorma3080ssan2.jpg.html)

We didnīt only bring jet vehicles, Olov brought his customized Ford Model-A 1930 and a 98cc motorbike that he overhauled when he was a school kid.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/OlovsA-ford.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/OlovsA-ford.jpg.html)

I had my Triumph with me and to my surprise won third prize in the motorcycle category, not bad at all considering all the fancy shiny harleys at the show.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Bonneville%20bobber/TriumphMotorma3080ssan.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Bonneville%20bobber/TriumphMotorma3080ssan.jpg.html)

My other friends Olle and Lasse had their tractorpullers with them, a Bison 470 with a Rolls Royce Meteor V12 and a 800kg minipuller with a severely turbocharged Mercedes diesel engine with 500-550hp.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Ollesv12a.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Ollesv12a.jpg.html)

Now it is time to stop playing around and start wiring the turbine bike up! :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on May 26, 2014, 04:02:47 PM
That tractor must sing a sweet song when one of the guys has his foot in the throttle.  And didn't I see your jet bike in one of the shots?  Even unfinished -- it's cool. :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 26, 2014, 05:02:35 PM
That tractor must sing a sweet song when one of the guys has his foot in the throttle.  And didn't I see your jet bike in one of the shots?  Even unfinished -- it's cool. :cheers: :cheers:

Very first shot. Lost your glasses?
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on May 26, 2014, 05:38:14 PM
Interesting, Grumm.  Now that I look I see it in the first photo.  The sighting I made the comment about -- was in the second shot, which evidently you missed.  Did you misplaceyour glasses? :evil:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 27, 2014, 05:15:31 AM
That tractor must sing a sweet song when one of the guys has his foot in the throttle.  And didn't I see your jet bike in one of the shots?  Even unfinished -- it's cool. :cheers: :cheers:

Oh yes it is quite loud, two Holley Dominator 1250 carbs feeding it so it pulls like crazy with somewhere around 1000hp. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on May 27, 2014, 07:33:49 AM
Problem is, I need glasses to find my glasses
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 30, 2014, 03:15:37 PM
Back from the motor exhibition with a bucket full of inspiration I cleaned out at least 50 kg of grinding dust, scrap metal and other bits and pieces to make plenty of room for the turbine bike, I nailed some stuff from the exhibition on the workshop wall as well to make it a bit cosier.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011610.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011610.jpg.html)

Time to get the bike on the road! I took the fairings off and disassembled the fork legs to fill them with the fork fluid I didnīt remember to put in them during assembly, I also fitted the brakes.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011611.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011611.jpg.html)

Here is a scetch of the upcoming wiring, I will wire it temporarily and once I know that everything works the way I want it to Iīll do it properly. Lots of time for such things after the summer has passed, now I just want to get the bike up and running.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011612.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011612.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on May 30, 2014, 04:29:17 PM
Anders... we would help with the wiring, but all that chicken scratch in unreadable... at least to us yanks and probably the English and the boys down under... both islands...  :-D  :-D  :-D  :evil:  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 31, 2014, 06:03:18 AM
Ha, if you think written Swedish is jibberish wait until you hear it spoken. Being a native Swede it is difficult to hear what is sounds like but I assume that the Muppet show pictured us pretty spot on. :-D


Title: Re: Re: Re: APS/Ω Gas turbine bike build
Post by: bbarn on May 31, 2014, 06:46:33 AM
Ha, if you think written Swedish is jibberish wait until you hear it spoken. Being a native Swede it is difficult to hear what is sounds like but I assume that the Muppet show pictured us pretty spot on. :-D

Ha! I love the Swedish Chef. Robot Chicken did a funny skit with him too.


Title: Re: APS/Ω Gas turbine bike build
Post by: gidge348 on May 31, 2014, 08:34:25 AM
Ha, if you think written Swedish is jibberish wait until you hear it spoken. Being a native Swede it is difficult to hear what is sounds like but I assume that the Muppet show pictured us pretty spot on. :-D

Hey Anders found a video of you on your bike at about 16 seconds into this http://www.youtube.com/watch?v=_bHv6Zz1bNg

Cheers...Ian


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on June 01, 2014, 01:25:06 AM
Ian, :cheers: that was funny :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 01, 2014, 03:24:08 PM
Last night I started working on the pile of stuff to do before the bike is ready to go for a ride, the job on top of that pile happened to be the dashboard.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011613.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011613.jpg.html)

The uppermost contact is a Neutrik contact for an external ignition, it has four leads so I can route 12V from the bike to the ignition module in two of them and use the other pair for the spark. Below it is a spring loaded button for the propane preheat solenoid, then you see the fuel pump switch and the switch for all three oil pumps with a safely cap so I donīt accidentally turn the pumps off.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011614.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011614.jpg.html)

Both fuel pump and the oil pumps will get their juice through separate 30A relays to avoid a switch failure like last time.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011615.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011615.jpg.html)

With that done I fitted the PWM-module to the air box.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011616.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011616.jpg.html)

Up next was the power turbine rev counter, the idea was to fit a magnet to the gearbox output shaft where the front sprocket is and have a inductive probe read the revs from it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011617.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011617.jpg.html)

Here a neodymium magnet is fitted, now I need a bracket for the probe.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011618.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011618.jpg.html)

Thatīll do! :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011619.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011619.jpg.html)

Probe fitted and eagerly awaiting some revs to measure!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011620.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011620.jpg.html)

Of course I had to fit the actual rev counter somewhere as well, I was about to make a fancy box for it but figured nahhhh and used a cat-strangler (local name for zip-ties) instead. Eventually I need to shield it from salt and water so Iīll probably make some sort of box for it later.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011622.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011622.jpg.html)

The clock showed well past midnight so before calling it a night I fitted a row of relays to the back of the seat, that was the only place where I could fit them and have the bundle of cables below them out of the way.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011621.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011621.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on June 01, 2014, 03:38:25 PM
AS always well thought out and clean installations.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 01, 2014, 03:52:31 PM
AS always well thought out and clean installations.

Thank you Glen, there is another dimension to it that canīt be clearly seen in the pics and that is trying to fit everything so I can disassemble the bike without having to completely strip everything from the air box etc.

Easier said than done I can assure you but as it stands now it looks like I can remove the engine, take it apart to fit a new rotor, assemble it and put it back in the bike in one night, that might come useful in case the engine ingests something from the track and wrecks the compressor wheel. If it takes longer I will lose a day of racing and that is not good at all.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on June 01, 2014, 04:41:57 PM
If there is any vibrations at all, I would put isolators on the electronic boxes.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 01, 2014, 10:58:45 PM
Other than the vibrations caused by the road surface there should be none at all, if so I have some serious engine problems.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on June 02, 2014, 12:04:32 AM
That is a nice shop.  Very good lighting.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 02, 2014, 12:19:12 PM
I use a couple of portable lights to get plenty of light on the bike or whatever I am working with at the moment, you can never get enough light in the workshop.  :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 04, 2014, 05:24:01 PM
I fitted the propane preheat and air start connections to the bike today.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011623.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011623.jpg.html)

Fits like a charm, now I can start the bike myself sitting on it instead of needing four arms to reach switches and levers all over the bike like last time... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011624.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011624.jpg.html)

I also routed the bleed air line from the engine casing to the oil dribbler and onward to the gearbox, I use clear hose now just to see if I have any internal oil leaks in the gas producer but later I will use a more heat resistant hose.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011625.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011625.jpg.html)

Here you can see that I added a 30A relay to run the return pumps separately instead of together, in case one fails I have one left that should keep the engine from flooding until I can turn it off.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011626.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011626.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on June 04, 2014, 05:31:55 PM
I am assuming that the battery will have a box over it. What type of hold downs do you have planed for the battery? keep up the good planing and fabrication. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 05, 2014, 04:02:02 AM
I will make a sheet metal box around the battery and make some sort of metal lid or strap to secure it with, I havenīt really given it much thought yet since the idea up until a couple of weeks ago was to have the battery laying down. That didnīt work out though since I needed to free up some space for the oil dribbler. Some sort of heat shielding underneath the battery will also be needed so I donīt cook it from the radiant heat coming from the engine exhaust.

The Bonneville inspection check list states that metal straps are needed so no fabric or anything like that will be used.


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on June 05, 2014, 07:11:04 AM
   Speaking of heat shielding, what are you using to protect your cajones? Maybe some tile from a used space shuttle.
  Doug  :evil: :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: gidge348 on June 05, 2014, 07:15:02 AM
Some sort of heat shielding underneath the battery will also be needed so I donīt cook it from the radiant heat coming from the engine exhaust.

The best heat shielding I have found is Air.... If you put another layer of aluminium with say 10mm gap and reasonable air flow this will stop the heat sink effect of the battery in contact with any panel that is likely to conduct, convect or radiate the heat.

Cheers Ian..


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 05, 2014, 01:12:59 PM
I agree Ian, and wrapping the engine in a heat blanket only increase the risk of heat warping so Iīll fit some sheet metal shields around the power turbine ducting and let the air carry away the radiant heat.

The inter turbine section will be 750°C at full throttle so I donīt want to have my boots jammed up directly against it... :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on June 05, 2014, 07:20:31 PM
Anders, what front sprocket is that?.

It looks familiar.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on June 05, 2014, 08:35:20 PM
I agree Ian, and wrapping the engine in a heat blanket only increase the risk of heat warping so Iīll fit some sheet metal shields around the power turbine ducting and let the air carry away the radiant heat.

The inter turbine section will be 750°C at full throttle so I donīt want to have my boots jammed up directly against it... :-)

Anders, if you really want to get fancy, gold plate your heat shield. Gold is the most effective reflector of infra-red radiation (heat) there is. That's why lots of space satellites are covered with a gold Mylar film-- so the sun's heat doesn't burn them to a crisp. It looks cool, too.  :-)

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on June 05, 2014, 08:46:53 PM
How much does that Mylar cost Neil?.


Title: Re: APS/Ω Gas turbine bike build
Post by: gkabbt on June 05, 2014, 08:59:32 PM
I agree Ian, and wrapping the engine in a heat blanket only increase the risk of heat warping so Iīll fit some sheet metal shields around the power turbine ducting and let the air carry away the radiant heat.

The inter turbine section will be 750°C at full throttle so I donīt want to have my boots jammed up directly against it... :-)

Anders, if you really want to get fancy, gold plate your heat shield. Gold is the most effective reflector of infra-red radiation (heat) there is. That's why lots of space satellites are covered with a gold Mylar film-- so the sun's heat doesn't burn them to a crisp. It looks cool, too.  :-)

Regards, Neil  Tucson, AZ

And when Wayne Jesel is running BMP with his Dodge truck, he uses the gold film!
Expensively COOL looking!

Gregg


Title: Re: APS/Ω Gas turbine bike build
Post by: gidge348 on June 06, 2014, 01:04:32 AM
Yep you are right, as long as they stick it on the right side..... :-P :-P

http://www.bakerprecision.com/longacr51.htm

Seen lots of times put on turbo heat shields and radiator tanks.... :roll: :roll: just for street cred...

F1's and Indy cars put it on the underside of body panels,,,,,


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 06, 2014, 10:54:24 AM
Anders, what front sprocket is that?.

It looks familiar.

Itīs an industrial sprocket, a friend modified it to fit the keyed output shaft from the gearbox.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 06, 2014, 10:57:43 AM
Anders, if you really want to get fancy, gold plate your heat shield. Gold is the most effective reflector of infra-red radiation (heat) there is. That's why lots of space satellites are covered with a gold Mylar film-- so the sun's heat doesn't burn them to a crisp. It looks cool, too.  :-)

Regards, Neil  Tucson, AZ

Thatīs a great idea Neil, I think Iīll need to use every trick up our sleeves to get the radiant temp down to pleasant levels for the feet.

Iīll make a stainless shield first and if it isnīt enough Iīll get some of that fancy gold plating stuff and coat it internally.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on June 06, 2014, 12:47:13 PM
How much does that Mylar cost Neil?.

You'd have to ask NASA that, Mike.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on June 06, 2014, 12:54:14 PM
Thanks for the link to Baker Precision. I had not seen that stuff before.

Anders, you might compare the price for enough of that material to cover your heat shield with simply electroplating a thin layer of gold on both sides of your stainless steel heat shield. A thickness of 50 microinches or more should do it.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on June 06, 2014, 12:56:01 PM
How much does that Mylar cost Neil?.

You'd have to ask NASA that, Mike.

Regards, Neil  Tucson, AZ

Neil, go back and follow the link on reply #547. Things that start out as for government use only slowly make it out to the racing community.

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on June 06, 2014, 12:58:31 PM
Neil, obviously you were replying while I was replying!  :-D :-D :-D

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on June 06, 2014, 08:48:15 PM
Does anyone still do gold plating.
Super toxic chemicals involved.
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 11, 2014, 12:52:51 PM
Last night I modified the battery box, I had to secure the battery well and make a mount for the main power switch. The bike class rules says no fabric or rubber clamps for the battery so I had to make a metal one.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011629.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011629.jpg.html)

I didnīt take many pics of the work since it wasnīt very exciting to see... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011630.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011630.jpg.html)

The main switch key will come out through the side of the rear fairing so I can easily reach it from the drivers seat.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011631.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011631.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on June 12, 2014, 01:21:54 AM
Nice one Anders. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 12, 2014, 03:45:07 PM
Thanks Tauruck!

Today Iīve been building the jet pipe extensions during a few spare moments, Iīm making these in mild steel as prototypes and when Iīve found out if the angles and length are ok Iīll make new ones in stainless.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011632.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011632.jpg.html)

I guess that Iīll find out pretty quick if they are directing the jet exhaust far enough away from my legs. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011633.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011633.jpg.html)

Sitting on the bike it feels like the length is pretty ok, it sure looks better now than before with the stub exhausts.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011634.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011634.jpg.html)

Theyīll probably have a different colour after the first start.... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011635.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011635.jpg.html)

I have also made a small fitting for a Hobbs adjustable switch before the boost pressure gauge, I will have it shut off the fuel pump if the P2 rises above 3 bar. This is a safety feature in case the PWM controller for the fuel pump fails and lets pure 12V through to the pump, that would severely overspeed the engine before I have managed to pull the safety chord.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011636.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011636.jpg.html)

Oh yeah, the safety chord. I had to run out to the workshop to take a picture of it since I forgot earlier. It will act as both a safety chord and a quick kill for the fuel pump that can be easily reached with the left thumb. The bike class rules clearly state that the driver must be able to kill the engine without removing the hands from the handlebars, and this kills two birds with one stone so to speak.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011637.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011637.jpg.html)

Cheers!
/Anders


Title: Re:
Post by: bbarn on June 12, 2014, 04:33:24 PM
Anders - If you have any ability to turn the exhaust more aft, you should try to do so. You will realize some gains from the thrust of the exhaust, plus the aerodynamic benefits of the exhaust not exiting at 90 degrees shouldn't be overlooked.

Ideally, but impossible, would be to route the exhaust to fill in the void created behind the bike/rider caused by separation drag.

Keep up the good work, I am really enjoying your build!


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on June 12, 2014, 07:39:52 PM
that type engine killswitch is pretty much a piece of crap. I know that for sure.

a really nice pingel engine killswitch is well worth the money.
 there are a few configurations.  $70 to $100 .

with as nice a build as you have going, I'd hate to see the engine shut off with that red plug still connected.

I am sure that you could build a better one yourself.

Bf262


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on June 12, 2014, 10:33:28 PM
   Somebody told me that having the exhaust exit straight out the side is like attaching a 4X4 on the side sticking straight out in the air. Also, any pressure differential from side to side could create some real handling problems. Ask the funny car guys what happens when they lose a cylinder on one side. This bike just fascinates me.
    Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 12, 2014, 10:59:27 PM
Thanks guys! The "straight out" exhaust is just a temporary one to get eventual flames at engine shutdown away from the battery and rider, later when I have the tail built I will make new exhausts that aim more to the rear.

It isnīt like I am going for the class record at the village road outside my house so any additional drag associated with the exhaust angle is perfectly ok with me. :)

The kill switch is a plastic one that probably isnīt that good, but for now itīll do. As you say I can easily make my own later with a better quality switch inside an aluminum housing.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on June 14, 2014, 12:24:15 AM
Don't use that switch.  A sudden loss of power at speed like what happens when that thing fails can make life real interesting.  This I know from experience.  The Pingel catalog has some good options to that switch.  Nylock wing nuts on the battery hold down might be a good idea.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 17, 2014, 01:23:20 PM
Iīll look into the Pingel assortment, thanks for the suggestion!

I started wiring the bike up last night, will be at it again tomorrow if I have time to buy some more cables and couplings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011638.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011638.jpg.html)

I will solder every crimp connection to avoid problems with oxide and cables coming loose.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011639.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011639.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on June 18, 2014, 12:00:34 AM
That looks like you're almost done. :cheers:

I love the way all you guys say you're "doing the wiring".
I wish I knew how. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 23, 2014, 03:20:11 PM
I am as far from a wiring expert as you can get, just blindly fumbling along hoping for the fuses to survive once the main switch is turned. :-D

Continuing with the wiring, lots of thinking required to avoid having to do everything twice...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011640.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011640.jpg.html)

I routed the oil tank vent to a place further back so the smoke wonīt catch fire from the jet exhaust.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011641.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011641.jpg.html)

Half of the dashboard wired up.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011642.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011642.jpg.html)

Something I really need to do before the first test drive is to find a small enough CO2 extinguisher that fits the bike, I would never forgive myself if a leak is sprung and the bike burns to the ground while I am searching for something to put the fire out with.

There are 2kg aluminum bottles in store but they are a bit bulky so I am considering making a custom handle for a Soda Streamer bottle, they hold 0.5kg CO2 and are slim enough to fit between the steering head and the seat. I can even fit two if I want to.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 23, 2014, 03:31:07 PM
And everything will of course be bundled together in fire proof cable covers later in case you wonder, so no hanging wires all over the bike. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on June 23, 2014, 05:27:17 PM
Anders:  Maybe you should adopt the old line we used to use when I was a kid just getting into ham radio.  We'd build something and then try to make it work by the phrase "tune for minimum smoke".  The first time you power up the circuits is always exciting -- sometimes a little TOO exciting.  Good luck. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on June 23, 2014, 09:12:25 PM
  Your job: Keep the smoke on the inside of the wires.
    Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on June 24, 2014, 12:19:23 AM
If you're far away from being an expert I want to see a real expert?. :-D

Nice job Anders.


Title: Re: APS/Ω Gas turbine bike build
Post by: bbarn on June 24, 2014, 09:59:53 AM
Anders - Just some random fire extinguishers that you may be able to adapt. They are single use, but also rather small.
http://www.lelong.com.my/foam-fire-extinguisher-car-home-aerosol-dry-powder-smoke-safe-1pcs-calvinryanchan-I1555899-2007-01-Sale-I.htm (http://www.lelong.com.my/foam-fire-extinguisher-car-home-aerosol-dry-powder-smoke-safe-1pcs-calvinryanchan-I1555899-2007-01-Sale-I.htm)

http://www.walmart.com/ip/Fire-Gone-Aerosol-Fire-Extinguisher-2pk/16203732 (http://www.walmart.com/ip/Fire-Gone-Aerosol-Fire-Extinguisher-2pk/16203732)

http://trade.indiamart.com/details.mp?offer=4334902748# (http://trade.indiamart.com/details.mp?offer=4334902748#)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 27, 2014, 05:00:20 AM
Iīve found a 400ml fire spray of the brand FirePal that should suit me perfect, no powder so no mess and small enough to fit anywhere on the bike. Can be bought locally which is a big plus.

http://www.jula.se/slacksprej-firepal-home-400ml-442033


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 27, 2014, 01:56:55 PM
Found a nice electric box in a scrap container at work this week and made a new lid for it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011644.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011644.jpg.html)

A perfect fit for the ignition system! I will route 12V from the bike to the ignition box through one cable pair and use another pair to get the high voltage signal back to the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011645.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011645.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on June 27, 2014, 02:00:55 PM
I like it. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 01, 2014, 11:40:07 AM
Iīve found a 400ml foam extinguisher locally, spray can sized so it can be placed anywhere on the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011646.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011646.jpg.html)

I am doing lots of progress on the wiring but it is impossible to take a picture that represents the work done... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011647.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011647.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 03, 2014, 03:51:23 PM
Houston, we have oil pressure! After four more hours of wiring I had everything set up for some pump testing, the oil pumps ran like they should so I filled her up with some oil and was rewarded with a rock solid 5kg oil pressure with not a single drop of oil leaking through the drain hose on the engine cover!  :cheers:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011649.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011649.jpg.html)

I spun her up with the scuba tank and everything ran smoothly with no rubs or sign of tight tolerances, still not a sign of oil leaks after a minute of full oil pressure so I was very pleased. The throttle potentiometer didnīt work though so I will have to do some fault finding this weekend, no big deal. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on July 03, 2014, 08:48:53 PM
Rocket science. :cheers:

There is a lot of wire there man. :-D

That frightens me for what I have coming.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on July 04, 2014, 12:15:45 AM
I am going to copy that fire extinguisher idea on my bike.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 04, 2014, 07:27:57 AM
Tauruck: It didnīt seem like much to wire up but the cables start to add up to a real mess very quickly. :-)

Wobblywalrus: Do so, they are very compact and leave no mess since they arenīt powder based.


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on July 04, 2014, 07:46:30 AM
Anders, I grew up being comfortable with lots of wires -- as a ham radio operator that built lots of stuff.  I learned early in that career that there are a few terms in this country to describe wiring snarls.  The more socially-acceptable of these is to call is a rat's nest, but the other has such a fine sound to it -- a "cluster-f*ck" of wires.  Isn't American English fun?  What's the Swedish term for your wiring?


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on July 04, 2014, 10:51:38 AM
just saw this thread for the first time.

I'm stunned.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 04, 2014, 11:07:23 AM
Anders, I grew up being comfortable with lots of wires -- as a ham radio operator that built lots of stuff.  I learned early in that career that there are a few terms in this country to describe wiring snarls.  The more socially-acceptable of these is to call is a rat's nest, but the other has such a fine sound to it -- a "cluster-f*ck" of wires.  Isn't American English fun?  What's the Swedish term for your wiring?

There is also the expression "It's a kluge".

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 04, 2014, 03:03:48 PM
Slim & Neil: Here it is commonly known as a "skatbo", translates to a certain birds nest that looks like a brush in a tree...

Sofadriver: Glad you like it, I could have cut some corners (and probably saved some cash as well) by purchasing a small helicopter engine but how fun would that be? :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 09, 2014, 01:06:57 PM
The Mercedes throttle position sensor I was going to use as a PWM throttle didnīt work out, it had a too narrow resistance width so I had to take it apart with the hack saw and modify it so I could couple a regular potentiometer to it. Works like a charm but not very fancy, I will make a water tight casing around it later.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011651.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011651.jpg.html)

After that I fitted the ignition system to the box and wired it up, so now I have both spark and propane solenoid activation when I push the preheat button.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011652.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011652.jpg.html)

Only some adjustment of the Hobbs safety pressure switches to do and heat shielding the bundle of cables before I can plan for a start attempt! :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 09, 2014, 03:14:53 PM
Slim & Neil: Here it is commonly known as a "skatbo", translates to a certain birds nest that looks like a brush in a tree...

Isn't there also a Scandinavian word for it, "lort"?

 Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 09, 2014, 03:28:22 PM
Slim & Neil: Here it is commonly known as a "skatbo", translates to a certain birds nest that looks like a brush in a tree...

Isn't there also a Scandinavian word for it, "lort"?

 Regards, Neil  Tucson, AZ

"Lort" translates to "dirt" in the meaning of unwashed bodies or badly cleaned houses.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 11, 2014, 04:18:13 PM
I measured the oil flow through the engine yesterday to see exactly how much that passes through it in a minute, at 5 bar oil pressure I got 1.8 liters/minute through the scavenge lines.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011653.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011653.jpg.html)

Other than that I bundled the wiring together and heat shielded it with exhaust wrapping and aluminum tape where it will be subjected to radiant heat from the engine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011654.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011654.jpg.html)

Earlier I bought a lenght of heat resistant cable cover that I intended to use on the bleed air line from the engine to the gearbox.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011650.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011650.jpg.html)

Since the bleed air line is standard pneumatic hose (to see any eventual oil leakage) I needed to shield it, if not it would probably have melted.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011656.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011656.jpg.html)

The battery got wrapped with a section of fire blanket.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011655.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011655.jpg.html)

With that done I adjusted the two Hobbs pressure switches, one set to 3 bar on the oil line and one set to 3 bar as well on the P2 line to the pressure gauge.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011658.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011658.jpg.html)

If the oil pressure drops below 3 bar the fuel pump shuts off, also if the P2 rise above 3 bar it shuts off. That is a simple and bullet proof over speed protection in case the PWM controller fails and lets the fuel pump run flat out. I would never have time to manually shut the engine down in case it happens during a run so it will be a great safety feature. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011657.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011657.jpg.html)

This weekend I will test the preheat system and when it is checked I can start filling the scuba tanks for the upcoming test start! :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on July 11, 2014, 08:31:55 PM
  The oil appears to be aeriated and foamy. Is there an air leak on the suction side? May not be a problem, just wondering.
    Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 11, 2014, 09:01:15 PM
I thought the same thing.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 12, 2014, 01:20:58 AM
I have a bit of over capacity on the scavenge pumps to cope with the compressed air leaking past the piston ring seals into the shaft tunnel, when the engine isnīt running the pumps pull air in through the seals.

That is actually a good thing since it keeps the oil from leaking out into the engine casing.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 12, 2014, 04:51:49 PM
I took the bike outside to get a video of me testing the propane preheat an hour ago, my feancee held the camera while I was busy talking my head off and getting the preheat to light off. Just before the camera was started I did a test where it lit immediately but when the camera is rolling I gave it too much revs before I hit the preheat button so it took a while before it lit off.

https://www.youtube.com/watch?v=CTNTShWlTkY

All I need to do now is to refill the scuba tank and bleed the rear brake caliper in case I want to take her for a short run if everything seems to work ok. Fun times ahead! :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011660.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011660.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on July 12, 2014, 09:20:34 PM
you've got time for work, this AND a woman ?!!!  :-o

Now I'm really impressed!


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on July 12, 2014, 10:03:58 PM
And a kiddo!

Anders, where do you find time to sleep?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 12, 2014, 11:43:49 PM
Actually two kids, a couple of lovely daughters 2 and 4 years old. Plus a house that needs fixing, a one man company (mechanical work and fibre optic welding) on the side of the employment and a handful of other hobbies like running, motorcycling and a newly found interest in black powder revolvers.

Itīs no problem at all, but I canīt remember how it felt like idling around not knowing what to do with my spare time... :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 13, 2014, 03:29:59 PM
I just couldnīt have a ready to run bike in my workshop any longer, so while those prancing football players were rehearsing their best theatre acts for the upcoming game I went outside to try to start the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011662.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011662.jpg.html)

Iīll probably watch this clip 15 times before I go to bed with a stupid smile on my face tonight. :-)

http://youtu.be/NXu9UKZCVW4

Not a bad run at all, the temps were a bit high and the throttle responce wasnīt like when it ran as a pure jet so I think the freepower NGV area needs to be opened up a bit. No rubs or anything noticeable so I think the engine is a survivor.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011663.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011663.jpg.html)

The drive chain threw some of its grease off, Iīll probably want to have the rev counter for the power turbine fixed before next start.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011665.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011665.jpg.html)

Big darn cheers my friends!!!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 13, 2014, 04:21:26 PM
 :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on July 13, 2014, 05:11:17 PM
Some things are even better than winning a trophy. You're a winner Anders!  :cheers: :cheers: :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on July 13, 2014, 08:54:57 PM
  Anders, That makes me want to come over there and be a crew member. [Except I know nothing about turbines]. Keep sending more test videos.
     Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on July 13, 2014, 09:16:38 PM
I gotta admit that I don't know that much about what you're building - but I do about the silly smile on your face after a successful first run of the motor on the bike.  Congratulations, and like Doug said -- keep posting those videos so we can see more of the bike and your work.  Thanks. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: SaltPeter on July 13, 2014, 09:41:30 PM
Fantastic work there Anders  8-) :cheers:  8-) :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: Vinsky on July 13, 2014, 10:50:02 PM
If you think Anders isn't a mad scientist, look at the rest of his youtube videos. He has an obsession with rocket and jet powered vehicles.
I hope I get to see this jet bike run. Have you given it a name yet Anders?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 14, 2014, 02:00:57 AM
Thanks a lot guys, things are looking promising indeed! The sparks coming from the exhaust are most likely small pieces of ceramic coating from the turbine scroll, I was running a 1000C inlet temp into the gas producer turbine and that is a bit hot even for the coating.

I am not really into naming my builds, but "Nordsvensken" came into mind a couple of years ago while I was planning for the frame jig design. It translated to "The Northern Swede" and is the name of a large Swedish bred working horse similar to an Ardenner.  :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on July 14, 2014, 11:37:46 AM
Very cool! I love it! Great job. You put a ton of time and effort into it and now its working right and really close to running down the road!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 15, 2014, 08:42:22 AM
Thank you Crackerman, it sure is a great feeling to have built a running motorcycle from a pile of aluminum and CrMo tubing. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on July 15, 2014, 11:42:13 PM
Anders, I watched the video. :cheers: :cheers: :cheers:

Very cool. You did good man.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 16, 2014, 04:59:55 AM
Thanks tauruck! Hopefully I will have time to do another test in a couple of weeks where I hope to see a 80-100C drop in exhaust temps, that would call for a beer! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on July 17, 2014, 09:49:28 AM
Anders, That's awesome man!  :cheers: Very happy for you. That's a big step in getting the bike on the track.

As far as the beer goes, I've found that the best beer I have ever had is when you're sitting back with a big smile on your face admiring your accomplishment! Keep it up man, I can't wait to see the bike in person. And better yet, watch it rip down the salt!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 18, 2014, 05:13:53 AM
Thanks! A beer well earned always taste best. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on July 18, 2014, 10:20:19 AM
Congrats Anders!   :cheers:  -Dean


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 24, 2014, 02:16:30 PM
I took the engine apart last night to fix the air leak.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011666.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011666.jpg.html)

It took only two hours to take the engine out of the frame, remove the casing, assemble the engine and install it in the bike again, not bad!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011669.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011669.jpg.html)

Threw a leg over the bike today, I ran it for a kilometer without problems and it pulled like a train even at 1/3 throttle! As an extra bonus for you guys I tried my best at speaking english. :-)

http://youtu.be/bKRx3L7E5X4

The temps are still a bit high so I think I will try to figure out a couple of more mods before I take it for a full trottle run, perhaps time to remove the freepower and fit an unrestricted lenght of pipe to the exhaust to see how hot it runs then.

Dodge! Four and a half year led up to this moment, now it is time to get this baby singing at its highest note at the track! :cheers:

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on July 24, 2014, 02:25:39 PM
  The moment you've been waiting for.  :-D :-D :-D
    Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: JoshH on July 24, 2014, 02:31:07 PM
"Hopefully it won't catch fire" Whenever a test drive starts with this phrase you know it's going to be good.  :-D

Well done Anders! What you've achieved here is just great, you've built your own turbine, and then the bike for it to power. Thanks for sharing and congratulations!


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on July 24, 2014, 03:16:33 PM
I'm going through a tough time here but just watched your video and you made my day.
Thanks Anders. That was great.

Awesome project and it runs well.
Well done. :cheers: :cheers: :cheers: :cheers: :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 24, 2014, 04:50:08 PM
Thank you very much guys, one step closer to the salt flats. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on July 24, 2014, 04:55:52 PM
looks great Anders  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on July 24, 2014, 05:01:50 PM
Congratulations, Anders. This is a great milestone.  :cheers:

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: desotoman on July 24, 2014, 05:27:21 PM
Way to go Anders, you are a true Hot Rodder. Congratulations on the first ride.

Tom G.


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on July 24, 2014, 06:10:46 PM
Ah, the fun of a first ride on your bike.  I got the chilly giggles when I saw you head down the road - happy for you and happy to see the bike running well without any fire or oil spewing out of it, too.  Best wishes! :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on July 24, 2014, 06:19:02 PM
All of us reading and watching the build are having a cold one to celebrate your achievement's, we are looking for you at Bonneville when you make the trip, you have a big cheering section over here. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on July 24, 2014, 07:47:31 PM
That was fantastic, here's to you Anders  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on July 24, 2014, 08:02:02 PM
"it's ALIVE" :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on July 24, 2014, 08:07:53 PM
Very good.


Title: Re: APS/Ω Gas turbine bike build
Post by: charlie101 on July 25, 2014, 12:49:05 AM
Gratulerar till ett lyckat test! Det blir roligt att följa dej mot målet att köra på Bonneville!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 25, 2014, 12:56:50 AM
Thank you very much, I didnīt even have an upset stomach before this test so I guess I am starting to get confident about the engine. :-)

I will do some more tests after the vacation to try to figure out why the exhaust temps are a bit high, I could probably run it as it is but every single °C higher than necessary adds wear to the engine components so Iīll try to get the idle temps down to 650°C or so. That should leave me at 750-770°C exhaust temp at full throttle which translates to a bit over 900°C leaving the combustion chamber.

The fun part is that even if the engine sounds like its on the verge of disintegrating it is only at high idle in the video, it is above 2 bar it really starts to scream! :evil:

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 25, 2014, 02:04:37 AM
Here is the full GoPro video of the road test.

http://youtu.be/bIT4sAxYJjU

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Graham in Aus on July 25, 2014, 05:15:31 AM
Awesome Anders, the bike handles so well and smooth!

How funny that you met the other bike at the top of the road....

He must be sayin...... What the hel l is that!  :-o


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on July 25, 2014, 06:06:39 AM
Wow Anders! I can't imagine the feeling of elation you must have had after that ride. A job very well done.  :cheers: :cheers: :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: WhizzbangK.C. on July 25, 2014, 06:28:39 AM
Outstanding  :cheers:

Loved the looks on the Harley riders faces at the end. "What the F**K is that? " You couldn't have staged it any better.  :evil:

Have you checked your exhaust temp with a different gauge to verify that those temps are correct? I've spent time troubleshooting a non-issue in the past due to bad info from defective sensors, gauges, etc.  :-(  Just a thought.


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on July 25, 2014, 08:33:46 AM
Very awesome! It sure does scoot along real well, looks very smooth too.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 25, 2014, 02:32:06 PM
Thanks a lot guys! :-)

Outstanding  :cheers:

Loved the looks on the Harley riders faces at the end. "What the F**K is that? " You couldn't have staged it any better.  :evil:

Have you checked your exhaust temp with a different gauge to verify that those temps are correct? I've spent time troubleshooting a non-issue in the past due to bad info from defective sensors, gauges, etc.  :-(  Just a thought.

That is a very good question, the probe looks a bit worse for wear after several years of abuse so before I do anything else I will test it against a reference probe. Thanks for pointing this out!


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on July 25, 2014, 03:29:46 PM
Anders, Outstanding sir! Looks like she rides and handles well. Here's to that hard earned beer!  :cheers:  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on July 25, 2014, 03:44:09 PM
Very Well Done :cheers: :cheers: :cheers:

No fires; no crashes; but H.D has spies everywhere :lol: :lol:

Talk to me before you get ready for an IPO on the stock market :wink:

Hope to meet on the great white dyno :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 25, 2014, 03:51:30 PM
Anders, Outstanding sir! Looks like she rides and handles well. Here's to that hard earned beer!  :cheers:  :cheers:

Thank you! It handled very well actually, I expected worse from a long hardtail frame. An Austrian gas turbine guy at the JATO forum actually sent me 30 euros on Paypal for beer money after he saw the road test.  :cheers:

Very Well Done :cheers: :cheers: :cheers:

No fires; no crashes; but H.D has spies everywhere :lol: :lol:

Talk to me before you get ready for an IPO on the stock market :wink:

Hope to meet on the great white dyno :cheers: :cheers: :cheers:

Thank you! I really look forward to meeting all you great people here at the salts one day, I wonīt go before I have everything sorted out for obvious reasons but at least it doesenīt feel nearly as far away as it did a week ago. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on July 25, 2014, 04:34:26 PM
Has that great sound of the Turbinator II, we are ready for Speed Week. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on July 26, 2014, 12:02:54 AM
30 Euros!!!!. For beer money. That was nice of him and I understand why he did it,
You could get pretty wasted over here on 30 Euros. 425 bucks for beer. :-D
Enjoy it man, you really deserve it. :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 26, 2014, 01:09:33 PM
I ran this summers most important 1/2 marathon today, 1:27:27 in 28°C heat and a 10th place which I am very satisfied with. Improved my PB with three minutes despite the weather. Afterwards Ralphs (the austrian turbine guy) beer money rejuvenated me. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Beer.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/Beer.jpg.html)

When I got back home I tested the temp probes against an identical one, and they showed similar enough results all the way up to 900°C. I can count temp gauge error out then.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011670.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011670.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Ellwood on July 26, 2014, 02:25:01 PM
my knowledge of turbines is of a very limited and insufficient kind, but would an intake booze bottle or water injection bring the the unwanted high temperatures down somehow?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 26, 2014, 02:55:20 PM
my knowledge of turbines is of a very limited and insufficient kind, but would an intake booze bottle or water injection bring the the unwanted high temperatures down somehow?

It would, but that would only hide the problem and not cure it. I will test water injection later to squeeze the last power out of the engine but not until I have fund out what it is capable of as it is now.


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on July 26, 2014, 07:36:41 PM
very nice. Congrats.

good English, also.

Bf


Title: Re: APS/Ω Gas turbine bike build
Post by: FBR81 on July 26, 2014, 09:45:49 PM
 :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 27, 2014, 05:10:37 PM
Thanks! :-)

I removed the gearbox and power turbine from the bike today for the upcoming test where I will run the gas producer with only a temp probe and a short section of pipe without a jet nozzle.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011671.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011671.jpg.html)

While I had the freepower section removed I wanted to see how the internals of the gearbox was holding together, so I removed the C20 turbine wheel and found this:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011672.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011672.jpg.html)

Hmm, must be oil from the bearing lubrication that has overheated. That might be the cause for the slight rubbing I could feel when turning the input shaft, it called for further investigation.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011673.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011673.jpg.html)

It wasnīt hard to spot the problem, the composite cage for the front hybrid bearing had melted as you can clearly see in the pic below. Good thing that I decided to check since another run with this bearing could have ended in disaster.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011674.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011674.jpg.html)

It wasnīt completely unexpected, I had hoped that the bleed air flow through the bearing would keep it cool enough for the cage to survive but that was clearly not the case. Before spending even more money on a full complement ceramic bearing I will try a standard steel C3 bearing and see how well it survives, if Iīll make sure not to overspeed the gearbox perhaps it can endure the stress.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 11, 2014, 02:16:29 PM
I am back from a 10 day vacation trip so in a day or two I will start making a tachometer for the engine.

In my swedish build thread at a sportbike forum I was congratulated for an article in The Kneeslider that I didnīt know of, very fun to get attention without even asking for it. :-)

http://thekneeslider.com/building-a-turboshaft-powered-motorcycle-land-speed-racer/

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Freud on August 11, 2014, 07:01:45 PM
I hope your vacation wasn't at Wendover.

FREUD


Title: Re: APS/Ω Gas turbine bike build
Post by: charlie101 on August 12, 2014, 11:32:36 AM
30 Euros!!!!. For beer money. That was nice of him and I understand why he did it,
You could get pretty wasted over here on 30 Euros. 425 bucks for beer. :-D
Enjoy it man, you really deserve it. :cheers: :cheers: :cheers:

You got me to checkup! Then I  saw you are in South Africa!
30 EUR = 40 USD
30 EUR = 426 ZAR


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on August 12, 2014, 04:11:07 PM
Dead right Charlie. 24 cans for $15 and don't let the price fool you. The beer is top notch. :-D

http://www.makro.co.za/liquor/beer-LB


Title: Re: APS/Ω Gas turbine bike build
Post by: racer on August 12, 2014, 10:19:28 PM
Amazing engineering.......


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 13, 2014, 04:08:12 PM
Thank you very much Racer! :-)

Finished the tachometer mods today, I bought a cheap handheld unit, removed the diodes and the lens and made a separate housing for them with a length of cable to the unit.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011676.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011676.jpg.html)

I fitted the probe inside the air box and painted a white dot on one compressor wing, it works fine when rotating the engine by hand so hopefully it will work with higher revs as well. I will try it with the scuba tank tomorrow when the paint has dried.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011677.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011677.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 16, 2014, 04:13:41 PM
I had to modify the optical pickup a bit to get it to work reliably, the lens was messing things up so I removed it and made some other mods tonight.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011679.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011679.jpg.html)

With the diodes closer to the compressor wheel it reads the revs perfectly, I tested with an almost empty scuba bottle up to 6000rpm and not a single hickup so I think this will work. Everything is securely mounted so it shouldnīt end up getting sucked into the compressor wheel...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011678.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011678.jpg.html)

With that done I started making the test exhaust pipe, earlier I had spend a few hours turning a v-band flange from a piece of stainless in the lathe and with a 4" stainless pipe bend I got to work.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011680.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011680.jpg.html)

Before I welded it I clamped the flange down firmly to avoid any warping of the thin flange, it turned out really well in the end.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011681.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011681.jpg.html)

Here the finished pipe is mounted to the engine, the TOT probe is fitted exactly as it is on the power turbine NGV to make sure I am reading the same temp. It can differ somewhat depending on its location if the combustion is uneven. A pitot tube will be injected through the end of the pipe to measure the absolute pressure in the exhaust.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011682.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011682.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on August 17, 2014, 12:16:51 AM
Rocket science!!!.

My Danish buddy also does stuff I don't understand but I nod and pretend. :-D

Anders, I always get educated here. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on August 17, 2014, 12:57:16 AM
That exhaust will be added thrust if you can figure out how to shoot it out of the back end.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 17, 2014, 07:07:59 AM
This exhaust is only for static testing, I need to gather some data from the gas producer to figure out how to cure the temp issue.

The energy in the exhaust is spent after passing through the power turbine stage so there is nothing to gain from directing the exhaust backwards except perhaps a slight decrease in drag from exhaust no longer blowing out at an angle from the bike.


Title: Re:
Post by: bbarn on August 17, 2014, 11:43:31 AM
Anders, I am going to challenge your statement of the exhaust being spent. On a PT6-135A turbine used on Piper Cheyenne you pick up around 35 pounds of thrust per exhaust port (x4).

It is a similar setup (turbo shaft) / design, there has to be some amount of gain. Even if it is only to fill in the separation drag, there has to be something that can be used as a benefit. I doubt the air coming out of the exhaust is moving at a zero velocity too.


Title: Re:
Post by: Mobacken Racing on August 17, 2014, 01:09:08 PM
Anders, I am going to challenge your statement of the exhaust being spent. On a PT6-135A turbine used on Piper Cheyenne you pick up around 35 pounds of thrust per exhaust port (x4).

It is a similar setup (turbo shaft) / design, there has to be some amount of gain. Even if it is only to fill in the separation drag, there has to be something that can be used as a benefit. I doubt the air coming out of the exhaust is moving at a zero velocity too.

You are right, but given that the 135A has 5x the power output it leaves me with less than 30lbs of residual thrust. Nothing that can make any difference at all except melt the read fairing if the jet exhaust gets too close to it.

I will direct the exhaust at an angle backwards later when the fairings are made, perhaps 45° or so, any more and the bend might restrict the exhaust flow plus I risk heat damage to the rear of the bike.

Today I made the pitot tube so now everything is set for the upcoming test, Iīve even filled up the scuba tanks.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011683.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011683.jpg.html)

I used a 6mm 316 stainless tube reaching 2cm into the tube, I left a length of tube on the outside so the rubber hose would have a chance of surviving the heat.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011684.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011684.jpg.html)

And here is the gauge, ready for action! If the weather clears up I can do a test during the first part of the week, on thursday I will go to Tierp to watch the dragracing EM event! :cheers:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011685.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011685.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 18, 2014, 02:42:14 PM
To get a full video log of what is happening with the engine during the test I moved the pressure gauge I already had on the side of the air box up to the triple tree visible the Gopro camera.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011686.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011686.jpg.html)

I will be looking for signs of under pressure in the air box, this would indicate that the air box is restricting the incoming air while running the engine stationary. It will be very interesting to go through the video after the run to see if and when the P1 (pressure before the compressor) starts to change, and when I start doing high speed road tests I hope to see slightly higher pressure thanks to the ram air.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011687.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011687.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 30, 2014, 04:20:38 PM
I did the static test today, the crappy english is only for you guys. :)

http://youtu.be/bthi6eW4BgM?list=UUrsqamKC_NUQP-_7qzVdWCw

The Gopro video of the gauges.

http://youtu.be/qJvnafqw38Y?list=UUrsqamKC_NUQP-_7qzVdWCw

Some closeups of the gauges at 15°C and 1018hPa ambient pressure:

0.4bar (32.900rpm):
(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/04bar.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/04bar.jpg.html)

1.0bar (47.900rpm):
(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/10bar.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/10bar.jpg.html)

1.5bar (55.000rpm):
(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/15bar.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/15bar.jpg.html)

2.0bar (no RPM reading):
(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/20bar.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/20bar.jpg.html)

2.5bar (no RPM reading):
(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/25bar.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/25bar.jpg.html)

Too bad the reflective paint on the compressor nut came off, but Iīll fix that before the next test.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on August 30, 2014, 04:36:55 PM
Anders, you have way too much fun. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 30, 2014, 04:43:12 PM
Anders, you have way too much fun. :-D

Indeed, by now I do have a couple of eventful Saturdays in the back of my mind.  :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 17, 2014, 12:52:21 PM
I picked a new engine up last Saturday so now I have a bit less elbow space in my workshop... :-D

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Rolls%20Royce%20Viper%20301/Vipernpa30A0va3080ghem.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Rolls%20Royce%20Viper%20301/Vipernpa30A0va3080ghem.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Rolls%20Royce%20Viper%20301/Viper3.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Rolls%20Royce%20Viper%20301/Viper3.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: bbarn on September 17, 2014, 02:16:05 PM
Well Anders, I am glad you didn't get something big, loud and obnoxious!  :-D

"What are your plans for this?" he asked with great anticipation!

I just saw one of these engines in an old ('62 or '63) T3 parked in the Enola Gay hanger.


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on September 17, 2014, 02:47:07 PM
  Wow! Anders,
   The bike that that goes in should be quite a build. Looking forward to reading about that one.  :wink:
   Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on September 17, 2014, 05:59:44 PM
you're going to need a bigger bike
G


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on September 17, 2014, 10:47:24 PM
Nice frame and wheels.
All you need is a fairing. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 17, 2014, 11:03:40 PM
He he, no bike frame around this engine. I got an offer I couldnīt resist from a guy I know who bought it from England without knowing that the starter, ignition and some temp probes were missing, he tried to source parts but gave up eventually so he sold it to me.

I know a couple of guys who owns Vipers so I think I can get the probes and ignition modules, a cheap starter is hard to find but I am planning to build a hydraulic starter motor for it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Rolls%20Royce%20Viper%20301/Viper12.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Rolls%20Royce%20Viper%20301/Viper12.jpg.html)

When it is ready I will probably run it just for fun a while to get used to running it, later it might end up in some kind of chassis but I am a bit short of workshop space as you can see so I will need to build a larger workshop first... :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on September 18, 2014, 10:52:45 AM
OK Anders, since no one else has asked this question, I will-- what engine is that?

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on September 18, 2014, 02:04:01 PM
one of my mates has a few Vipers complete and spares , not sure on which model that is exactly but let me know what you need and i can ask 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 18, 2014, 05:11:43 PM
It is a Viper 301 (522 is the civil name), I am very interested in some spares if he has any. Especially the starter, two ignitor boxes and the thermocouples for the jet pipe.

----------

I removed the engine from the frame last night to fit the temp probes and fix a few air leaks.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011688.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011688.jpg.html)

The probes and the temp displays arrived a few days ago so time to get busy! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011689.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011689.jpg.html)

I drilled a 5mm hole in the compressor cover between two diffusor slots, it is the smaller one right next to one of the fastening bolts for the cover.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011691.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011691.jpg.html)

A small brass sleeve was made and the temp probe was glued to it with epoxy, the sleeve fits the hole and will be locked in place with a strip of metal held by the fastening bolt for the cover.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011690.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011690.jpg.html)

While waiting for the glue to set I fitted the TIT probe, it projects through a hole in the combustor downstream the teritary holes.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011692.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011692.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on September 20, 2014, 01:29:50 AM
Anders, type "Mike Charlton Jet Bike" into your search engine.  He uses a big motor like your new one. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 21, 2014, 03:11:08 PM
Anders, type "Mike Charlton Jet Bike" into your search engine.  He uses a big motor like your new one. 

Thats an interesting guy for sure, is he still racing his bike and has he taken any records? The articles I found was a couple of years old, thatīs why I am asking.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on September 21, 2014, 11:09:44 PM
Anders, someone on this site might know.  He did not race at BUB so I never got a chance to meet him.  He did run the bike on the salt a few years ago. 


Title: Re: APS/Ω Gas turbine bike build
Post by: 55chevr on September 22, 2014, 03:36:37 AM
I believe the jet  bike streamliner ran at Cook's 2 years ago.


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on September 24, 2014, 11:03:50 AM
I can look at the photos of Mike and his bike and find the dates from them.  I think it was more than just two years ago -- will let you know when I find 'em.  Above all else Nancy and I remember being in the Motel 6 one night and hearing this "whoooshing" noise outdoors followed by very bright light coming through the curtains in our room.  We looked outside -- and there, in the parking lot behind the Knight's Inn next to M6, was Mike and his crew and his bike.  He was running the engine for some test or another and it made for a spectacular display.

Only at Wendover (or, I guess, next door to Mike's house) do you get to see stuff like that. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 24, 2014, 01:52:07 PM
After fixing some air leaks I put the engine back together and fitted it into the frame again, here is your truly posing with a screwdriver while taking a picture with his left hand. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011693.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011693.jpg.html)

After the posing I welded the old jet nozzle to the exhaust pipe.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011695.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011695.jpg.html)

When it had cooled down a bit I fitted it to the engine, this jet nozzle has produced a 740°C TOT at 2.6bar P2 so now I have some numbers to compare the upcoming test results with.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011696.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011696.jpg.html)

With the engine in the frame I could fit the temp probes without risking to break them.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011694.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011694.jpg.html)

Finally I fitted the digital gauges to the dashboard and hooked them up, if they work fine I will get a couple more since they were very cheap compared to the analogue exhaust temp gauge I use to read the TOT.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011697.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011697.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 24, 2014, 02:28:40 PM
I can look at the photos of Mike and his bike and find the dates from them.  I think it was more than just two years ago -- will let you know when I find 'em.  Above all else Nancy and I remember being in the Motel 6 one night and hearing this "whoooshing" noise outdoors followed by very bright light coming through the curtains in our room.  We looked outside -- and there, in the parking lot behind the Knight's Inn next to M6, was Mike and his crew and his bike.  He was running the engine for some test or another and it made for a spectacular display.

Only at Wendover (or, I guess, next door to Mike's house) do you get to see stuff like that. :cheers:

That must have been quite a thing to witness. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on September 24, 2014, 03:04:27 PM
Yes, it was spectacular.  Before he shut it down there were a few dozen racers and friends our there watching.  He shut down, tweaked something, and started again.  A couple of times.  I think he quit in about 15 minutes total, having decided that any more would get him a visit by the Wendover police.

I stayed in that motel two weeks ago and didn't think to visit the chain link fence out back - to see if there were any burn marks still there. :roll: :roll:


Title: Re: APS/Ω Gas turbine bike build
Post by: 55chevr on September 24, 2014, 09:57:56 PM
Slim ... you are probably correct ... everything that wasn't last year is 2 years ago to me. or 3.

Joe


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 05, 2014, 11:11:34 AM
I did the gas producer test today, the added jet nozzle made the exhaust temps even higher so I didnīt press the engine overly much.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011700.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011700.jpg.html)

The T2 gauge interfered with the camera somehow causing the numbers to roll over the display, but they can still be seen fortunately. I have started on an Excel sheet where I enter all the data from each run so I have a couple of hours of work with that ahead of me.

http://youtu.be/mo8Z0GDytks

I will also punch some numbers to find out if the T2 is in the ball park, my gut feeling is that if I open up the exhaust a bit the engine is just fine.

If I want to have the bike ready for the race in february I need to find the quick fix and get the bike up and running, and right now I think that opening up the power turbine NGV a bit will make the exhaust temps drop to acceptable levels. Finding that last ounce of power in the engine can be done later, now I want to get it ready for the race track! :)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on October 05, 2014, 03:11:18 PM
Your fan club in the states is pulling for you. You can do it. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 07, 2014, 02:51:35 AM
Thank you Glen! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 08, 2014, 11:45:59 AM
Iīve decided to try to do something about the high idle temps, there is something strange about the temperature curve since it should run a lot colder at low throttle settings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011702.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011702.jpg.html)

I removed the compressor housing last night to measure the tip clearance, and I might have found a reason for the high temps. According to an earlier discussion with a friend I should aim for a <0.5mm radial clearance at the inducer that narrows down to a <0.12mm axial clearance at the exducer tips.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011703.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011703.jpg.html)

To get the exducer clearance down to 0.2mm (tightest I could get without blades rubbing when comp wheel was pushed radially) I had to fit a 0.25mm thinner shim behind the compressor cover, this means that I was running the engine with a 0.45mm exducer tip clearance. Almost 4 times the recommended clearance... :-(

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011704.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011704.jpg.html)

I also checked the turbine wheel clearance and it was ok after I fixed a slight misalignment between the turbine and the housing center.

Since the compressor clearance was so badly off Iīve decided to run the engine again before taking it apart completely, then I will know how much it has affected the temperature profile of the engine. The thicker shim was fitted before the second ever run when a prolonged preheat heated the shaft so the compressor wheel rubbed its housing.

http://youtu.be/3Gd_H8ClmHw

If you look at the maiden run where I ran a tighter tip clearance the engine was idling at 600°C with a jet nozzle fitted (before the turbine wheel started rubbing the NGV plate and I had to shut the engine down). Despite major air leaks and badly designed internal air deflectors the engine idled colder than it does now after years of modifications.

I think I am on to something here... :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tallguy on October 09, 2014, 12:19:51 AM
I haven't read all 46 pages of this thread, so please excuse me if what
I say has already been addressed.

Good luck.  Looks like an interesting project.  I hope the motorcycle
performs as well as you hope it will.

I'm a little surprised by the solid (unsuspended) rear end.  I suggest
you at least consider having a shock-absorbed rear suspension.

If the rear tire leaves the ground, then the engine could rev up and
cause wheelspin, which is highly likely to cause handling and safety
problems.  Ask George Poteet about wheelspin-caused problems!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 09, 2014, 11:53:31 AM
Thanks! :-)

Iīll cross that bridge when I get there, building a suspended frame would have set me back years in the build process before Iīve had everything sorted out.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 09, 2014, 03:27:00 PM
I fitted a second TOT probe today to find out if the high temp readings are caused by a faulty thermocouple, I also removed the jet nozzle to keep the temps down a bit. I have good readings of the temp both with and without the nozzle so it doesenīt matter.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011705.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011705.jpg.html)

To avoid the rolling red numbers on the dashboard caused by some interference with the GoPro camera frequency I am using a different temp meter for the second TOT, it is the yellow hand held meter strapped to the rev counter.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011706.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011706.jpg.html)

I also got a mail from my friend Fläppen, he has just calculated the compressor efficiency and it wasnīt at all that bad as I was told earlier. He will get back to me with the rest of the results once the data model is finished.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Eta.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/Eta.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on October 09, 2014, 06:53:51 PM
Anders;

Could the high temp reading have been caused by the wrong type of thermocouple. For example, a type K thermocouple has its own calibration curve; any other thermocouple used with a meter calibrated for a type K will give an error.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 09, 2014, 10:55:30 PM
In this case the thermocouple used was bought as a set with the gauge, so it should have been calibrated. I have used it for years so perhaps the abuse has taken its toll, earlier it hasnīt been showing any unusual temps so something must have happened to it recently.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on October 10, 2014, 11:02:41 AM
Yes, that sounds like it was damaged or its age was showing.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 13, 2014, 03:48:49 PM
I did a new test yesterday and I am even more suspicious about the thermocouple now, the new one didnīt register temps higher than 400°C so I have fitted a second one identical to the one I have used from the beginning.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Hotjetpipe.png) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/Hotjetpipe.png.html)

Iīve positioned it at 12 oīclock and further downstream the engine to avoid any hot spots, in the video hot sport can be seen at 9 oīclock and at 6 oīclock where the thermocouple is. Iīll try to get another test done some evening this week to test the idea, so keep your fingers crossed! :-)

http://youtu.be/Ds-4zD9Lbj4 (http://youtu.be/Ds-4zD9Lbj4)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 13, 2014, 11:40:31 PM
The flowers in the background wave back and forth when the bike is running.  It produces some serious exhaust thrust.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 15, 2014, 05:05:44 AM
Yup, it is surely producing lots of thrust. Imagine all that converted into torque in the freepower turbine later. :evil:

I did the double thermocouple test last night, it didnīt show any improvement in temps so I will take the engine apart to see if there is some design issue in the turbine stators, a leaking fuel manifold or anything like that.

http://youtu.be/ywbVvCOiPKs (http://youtu.be/ywbVvCOiPKs)

You can guess that lots of thoughts flew through my mind when the oil tank burst, I was certain that something inside the engine broke so I quickly shut it down expecting the worst. :-)

Cheers!
/Anders


Title: Re:
Post by: bbarn on October 15, 2014, 05:29:33 AM
Finding the issue with the oil tank now makes your test a complete success. Finding it in the middle of a run could make for a huge failure.


Title: Re:
Post by: Mobacken Racing on October 15, 2014, 06:58:01 AM
Finding the issue with the oil tank now makes your test a complete success. Finding it in the middle of a run could make for a huge failure.

Exactly, that would have been a major disaster.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 15, 2014, 03:10:50 PM
After a long, long day full of anticipation I finally could pull the engine apart to check out the internals. What would the core look like after several minutes of full power runs with high temps?

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011709.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011709.jpg.html)

Unbelievably good actually! The NGV section looks fine with the coating still in place although a bit discoloured, vapor tubes ok as well, some slight rounding around the end of the tubes but I had to look for it to see it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011710.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011710.jpg.html)

The guide vanes are still as sharp as they were when they were new, hard to believe since they are the most exposed pieces of metal in the engine. The combustor is looking like new as well, no cracks or dents anywhere.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011711.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011711.jpg.html)

The turbine wheel has some burned oil deposits near the blade roots, might be some minor oil leak past the shaft seal. Other than that it looks fine, no signs of heat soak past the rear bearing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011712.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011712.jpg.html)

I removed the fuel manifold and tested it with propane, it was difficult to take a good picture of it since I had to hold the preheat button down to keep the propane flowing. No blocked syringes but two of them were flowing a bit less than the others so that will be adressed later.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011713.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011713.jpg.html)

And now to the main attraction, the NGV throat area! *drum roll*

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011714.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011714.jpg.html)

I finally think Iīve nailed the temp issue, the throats measures 10mm x 19mm which calculates to a total of 34.2cm2. Take away the impingement nozzle area and I end up at 33.7cm2. That is not exactly near the 31.6cm2 I should have had.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011715.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011715.jpg.html)

If I block one of the passages I get a total of 31.8cm2 which is close enough I think, might be worth a try before I go ahead and make a completely new NGV.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on October 16, 2014, 11:04:12 AM
A carpenter makes a good living if he measures twice for each saw-cut...............

Following this thread is much more interesting than going to Tech-School 8-) 8-) 8-) 8-) 8-) 8-)


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 16, 2014, 12:37:11 PM
Lots of years ago I was a construction laborer and I wanted to upgrade to carpenter.  I tried the job for a day and I did that measure twice and cut once deal.  The foreman came over and said "We do not have time for that BS, measure once and cut the dang thing.  If you need to do it twice you need to find another job."       


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on October 16, 2014, 01:15:24 PM
One measurement is physical, the other is the mental application drawn from experience. Bo..........you probably didn't need the second physical measurement by the end of the first day.

Today's school teachers instruct the students to estimate the answer before attempting to calculate the outcome. This places experience at a higher level but also challenges each student to FOCUS on the problem at hand.............not the dream in the window. 

I'm still transitioning from the 'dreamer' to the 'I did it' phase of my time on this earth..............as measured by results. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 22, 2014, 01:45:24 PM
I started working on the rear fairing last night, lots of styrofoam dust that clings to every Dodge thing in my workshop but I prefer that to be working outside in the dark and snow. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011726.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011726.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011727.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011727.jpg.html)

Here the styrofoam pieces are glued in place and it was time to get even dirtier, I used the angle grinder with a scotchbrite disc to get some shape to the fairing, then I continued an hour with sand paper before it was time to hit the bed.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011729.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011729.jpg.html)

I hope to find a couple of hours tomorrow to continue working on the fairing, I have ordered a length of 10mm ss2348 pipe to make new evaporator tubes so until it arrives I will struggle on with this. :)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on October 23, 2014, 07:07:19 AM
looks good.
bf262


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 24, 2014, 02:15:33 PM
looks good.
bf262

Thanks! :-)

Last night I made the jig for the evaporator tubes, I wanted to make an inlet radius and four depressions in the walls to make the heat exchange a bit better.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011730.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011730.jpg.html)

After a couple of hours on the mill and lathe I had these parts on the work bench, the bundle of tubes are the material for the new evaps in 316L stainless.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011731.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011731.jpg.html)

I use a M12 screw to set the length of the tubes when I punch the radius, very easy to adjust the length with it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011732.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011732.jpg.html)

Here is the first test evaporator tube after some bashing in the jig, the radius could be a bit larger but other than that it looks ok to me.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011733.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011733.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 25, 2014, 06:24:40 AM
I finished the evaps this morning, piece of cake when you have made a proper jig for the job. :-)

First off I pressed the inlet radius on all 18 pipes...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011734.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011734.jpg.html)

...and then I took them down to the proper length in the lathe. 100mm long leaves 13mm clearance to the combustor wall.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011735.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011735.jpg.html)

While working on pipes you really need to listen to some proper music for the best result. :mrgreen:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/cypress_hill_cd_cover_by_tinypixiegirl-d2yr4pj.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/cypress_hill_cd_cover_by_tinypixiegirl-d2yr4pj.jpg.html)

With "Hits from the Bong" at full throttle on the stereo I punched the four side dimples in all evap tubes.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011736.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011736.jpg.html)

18 evaporator tubes ready to be installed!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011737.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011737.jpg.html)

I removed the old tubes from the NGV housing and milled a radius to the holes...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011738.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011738.jpg.html)

...and fitted the new evaporators.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011740.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011740.jpg.html)

The dimples are placed so the syringe jet hits the tube wall just before the first one. It would be really interesting to have a look in there somehow to see what is happening during combustion, all we can do is make qualified guesses on what is going on.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011741.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011741.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on October 25, 2014, 07:12:32 AM
Awesome work there Anders and I like the foam buck.

It looks like it will turn out great. :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 25, 2014, 08:23:22 AM
Awesome work there Anders and I like the foam buck.

It looks like it will turn out great. :cheers: :cheers: :cheers:

Thanks! Especially good to hear that the fairing plug looks acceptable since Iīve never done anything like it before. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 25, 2014, 08:55:58 PM
Thanks for posting all of this, Anders.  I know it is a lot of work in addition to the building aspect.  It is appreciated.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 26, 2014, 03:23:41 AM
You are welcome, it does take some time to write everything down but I like doing it. I try to make my build threads into something I would enjoy reading myself. :-)

The build thread also doubles as a project diary, countless times I have digged through a thread to find out about a test run a couple of years ago or something else I have forgotten all about.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 26, 2014, 04:46:41 PM
I got a few hours for myself tonight so I tacked the evaporator tubes in place and was just about to align them when I took this picture.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011742.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011742.jpg.html)

With the evaporators aligned and welded in place I could fit the combustor to the NGV housing again, I really thought this would take longer to get done but everything from ordering the material to the jig making went really well.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011743.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011743.jpg.html)

Another thing that needed fixing was the partially blocked injectors, with compressed air blowing in the direction of the flow I managed to open up one of the syringes but the second one needed to be replaced.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011744.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011744.jpg.html)

With the new syringe injector silver soldered in place I could do the propane test again and now it looks much better. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011745.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011745.jpg.html)

Finally I put some more filler on the plug for the rear fender, I have to take it in steps so the filler have time to set properly.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011746.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011746.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on October 26, 2014, 05:55:28 PM
Looking great as usual with your work.


Title: Re:
Post by: bbarn on October 26, 2014, 06:06:42 PM
Nice job Anders! Tip: buy a cheap air gun/sprayer and some PVA. Write PVA only on the gun and use it to spray only PVA. It is a release agent for your molds, you'll be happy you used it. It is water soluble and edible, you can spray it anywhere. You can also brush it if you like, but spray give a more even coat.

When you get ready to layup your mold, there are several tips that can make it easier if you haven't worked with glass and molds before.


Title: Re:
Post by: Mobacken Racing on October 26, 2014, 11:39:02 PM
Thank you Glen!

Nice job Anders! Tip: buy a cheap air gun/sprayer and some PVA. Write PVA only on the gun and use it to spray only PVA. It is a release agent for your molds, you'll be happy you used it. It is water soluble and edible, you can spray it anywhere. You can also brush it if you like, but spray give a more even coat.

When you get ready to layup your mold, there are several tips that can make it easier if you haven't worked with glass and molds before.

That is a great tip, I have a spare spray gun that can be used for this. I would appreciate any tips on this since I am new to this glass fibre business.


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on October 27, 2014, 10:02:22 AM
I'm with Glen. Excellent work as usual Anders.  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 29, 2014, 05:33:41 PM
Thanks! :-)

Yesterday I got a package with the mail from a guy called Flu at a Swedish motorcycle forum I am active at, four Fluke thermocouples with weld bungs!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011753.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011753.jpg.html)

Today I started assembling the engine again, since you have seen pics from it a hundred times before I didnīt bother to take so many pics. Here is one where I have just torqued the compressor nut.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011754.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011754.jpg.html)

I gave the compressor a new white dot that the tachometer is aimed at, earlier I painted it with the engine in the frame but now I could do it a bit better with a slightly sanded surface for the paint to stick to properly.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011755.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011755.jpg.html)
 
I also gave the rear fairing plug another layer of filler before I called it a night. On a side note I made a mount for my aftermarket starter for my Rolls Royce Viper.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011752.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011752.jpg.html)

A better view:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011750.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011750.jpg.html)

Cheers!
/Anders



Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on October 29, 2014, 06:46:12 PM
Anders, since you obviously know bunches about jet engines -- will you tell me why most, if not all, of the jet airplanes I see at airports have a little curly design painted on the pointy nose of the engine?  It's about one thread of a screw design.  I've always assumed that it is there to alert anyone walking by that the engine is spinning, but I also would think that it's be difficult to miss the fact the a jet is running only a few feet from the walker.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 29, 2014, 11:49:45 PM
Hmm, I can only guess that it is just to alert guys working there with their hearing protection on. Or maybe some kind of hypnotic trick to fool the Canada gooses into not flying into the engine? :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: rouse on October 30, 2014, 08:59:13 AM
Slim,

I think that marking is a "G", for GE.

Most ground crews know better than to walk in front of a running engine, the dumb one don't last long. :-D

Rouse


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on October 30, 2014, 09:54:33 AM
Keep guessing, gents.  It goes at least one full circumference (well, save that it does not connect end-to-end), and that'd make for a really strange "G".  I figger that it might be for the manufacturer of the engine, but I don't think GE has that much of a lock on the market that so few RR and PW and whatever else there is -- show up where we've flown.  Maybe I'll have to go searching.  Let me finish this sandwich, though -- then I'll look.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on October 30, 2014, 11:46:59 AM
When there are three other jet engines running nearby and you have on your ear protection, it is easier than you might imagine to not notice that the one you're walking in front of is running. Those spirals are good dynamic indicators of a spinning jet engine.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: redhotracing on October 30, 2014, 02:09:49 PM
Neil is spot on with that one... back in my USN days, you'd have 20+ turning (aka running) aircraft
on the flight deck at once... It's very difficult to know which is doing what, so just like a gun being
loaded, you assume that every one of them is at full military. Makes for a safer deck.


Title: Re: APS/Ω Gas turbine bike build
Post by: rouse on October 30, 2014, 04:31:04 PM
The GE has  the "G" where as the RR has a "Time spiral" kind of like Twilight Zone spiral. I'm not sure what P&W has on theirs, it looks like a tear drop, maybe its a wing, big at the center point of the spinner and tappers to a point as it get further from the center .

Rouse


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on October 30, 2014, 05:59:55 PM
I guess I've seen lots of Rolls engines.  Thanks, gentlemen. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: redhotracing on October 30, 2014, 06:55:00 PM
I'm not sure what P&W has on theirs, it looks like a tear drop, maybe its a wing, big at the center point of the spinner and tappers to a point as it get further from the center .

Rouse

Our EA6B's used P & W J52/P408(A)'s, even on the military stuff there was a slight teardrop on the turbine nose.



Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 03, 2014, 02:35:45 PM
The engine is back together and next up is to modify the gearbox for oil jet lubrication.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011756.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011756.jpg.html)

By the way, it is the final month of the Boca Bearing competition and all votes are reset. The two youtube-celebrities with one million followers or so have won one month each so now it is a golden opportunity for me to glide in there and pick the last ticket to the final!

Pleeeeeease my dear friends, can you find in your hearts to vote on me again? Keep harassing your neighbors and relatives until they vote as well. Those of you with Facebook know what to do! :-)

http://www.bocabearings.com/innovation-contest/ContestantDetails.aspx?ProjectID=137  (http://www.bocabearings.com/innovation-contest/ContestantDetails.aspx?ProjectID=137)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Deereyes.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Deereyes.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Rex Schimmer on November 03, 2014, 04:02:01 PM
Looks fast! Great to see it move under turbine power. I got a little quezzy when you first fired it up with saddles, shorts and no shirt on!!

Congrats!

Rex


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 03, 2014, 04:07:28 PM
Looks fast! Great to see it move under turbine power. I got a little quezzy when you first fired it up with saddles, shorts and no shirt on!!

Congrats!

Rex

Thank you Rex!

Iīve been around home built gas turbines for 12 years now so I guess I am getting a bit careless with the personal safety equipment, but the only thing I am worried about is a burst turbine wheel and a shirt and a pair of long pants wonīt help if that happens...

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on November 03, 2014, 04:09:27 PM
I put my vote in an hour ago and there are three times the number of votes in now. It looks like you're getting a response Anders. Good luck!  :cheers: :cheers: :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: generatorshovel on November 03, 2014, 04:44:35 PM
Good luck mate, we were warned about how these comps work though  :-o
Tiny


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on November 03, 2014, 09:00:09 PM
I voted and hope a few friends will also vote...................Timely Practice............tomorrow is election day in the US :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: SabreTooth on November 07, 2014, 10:11:18 PM
By the way, it is the final month of the Boca Bearing competition and all votes are reset. The two youtube-celebrities with one million followers or so have won one month each so now it is a golden opportunity for me to glide in there and pick the last ticket to the final!

Pleeeeeease my dear friends, can you find in your hearts to vote on me again? Keep harassing your neighbors and relatives until they vote as well. Those of you with Facebook know what to do! :-)

Anders, you have my vote. I continue to be fascinated by your build and engineering. I hope to see your creation on the Bonneville Salt Flats one of these days.

Cheers and good luck.


Jim


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 08, 2014, 02:25:17 AM
Thank you very much guys, I am in the lead right now so chances are that I make it to the finals where a jury decides who wins the 5000USD first prize.

Yesterday I got the new ceramic bearings Iīve ordered, stainless cages should take the heat better than plastic and the soon-to-be oil jet lubrication should keep the temps down and the bearings happy. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011757.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011757.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: generatorshovel on November 08, 2014, 03:06:03 AM
Check the bearings spin freely Anders, one of mine didn't , and had to be returned, Boca were very obliging, as they should have been.
Tiny


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 08, 2014, 04:09:20 AM
Check the bearings spin freely Anders, one of mine didn't , and had to be returned, Boca were very obliging, as they should have been.
Tiny

Iīll do that, thanks Tiny!


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on November 08, 2014, 01:35:18 PM
Anders,

You probably know this but some do not-- Never spin a bearing with compressed air!

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on November 08, 2014, 02:11:02 PM
Okay, Neil -- why not spin a bearing with compressed air? :?

Thanks.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on November 08, 2014, 05:26:02 PM
Two reasons-- the compressed air probably contains moisture and it is easy to run their RPM up to the point of damage.

Thus spake "The Bearing Handbook"...

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: rouse on November 10, 2014, 08:57:27 AM
SSS and Neil,

Great to bring this spinning bearings with air thing up. Why? because it is dangerous as it can be to do such a thing.

The outer race is not designed to handle any centrifugal loads at all, so if you spin the outer race with air it will in fact "blowup" in your face.

I have that Tee Shirt, and I was lucky, the outer bearing race just disappeared without a trace. No one got hurt, so it was just a good lesson. 

Doing damage to the bearing is one thing, but more important you could be hurt bad in the process.

Rouse


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 13, 2014, 03:59:03 PM
Iīve gotten 1/2 of the gearbox modifications done by now, the first thing I did was to cut a groove for a piston ring seal in the freepower turbine coupling.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011758.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011758.jpg.html)

With that done I made an oil jet nozzle in brass, two 1mm holes opposite each other will spray oil at the ball bearings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011759.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011759.jpg.html)

Here is the finished nozzle silver soldered to a hydraulic fitting.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011760.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011760.jpg.html)

Here you can see it sitting, ready to do some serious lubing! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011761.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011761.jpg.html)

To drain the oil out from the primary shaft tunnel back to the gearbox sump I arbored a groove in the rear bearing seat.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011762.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011762.jpg.html)

I fitted a scrap bearing so you can see the finished groove, it exits just behind the pinion gear.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011763.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011763.jpg.html)

My next project will be to figure out how to make the gear mesh oil jet, I will need to force a jet of oil in between the gears since the centrifugal force will throw off any oil picked up the wet sump.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011764.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011764.jpg.html)

And two bonus pictures, a local newspaper did a two page story about me and the turbine projects today so I got a fair bit of comments at work. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/OumlP-reportage1.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/OumlP-reportage1.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/OumlP-reportage2.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/OumlP-reportage2.jpg.html)

http://www.op.se/jamtland/ostersund/han-drommer-om-att-bli-snabbast-i-varlden-pa-motorcykel-1 (http://www.op.se/jamtland/ostersund/han-drommer-om-att-bli-snabbast-i-varlden-pa-motorcykel-1)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Stan Back on November 13, 2014, 06:18:25 PM
I think I learned more from the video than what I've absorbed on this thread so far.  That's how dumb I am.  Se Habla Espanol?  (I don't, either.)

Good luck in your endeavor!


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on November 13, 2014, 09:58:35 PM
It is nice to get some local publicity.

Do you have a filter or screen on the oil supply so lube contaminants do not plug the oil nozzle?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 15, 2014, 10:34:20 AM
I think I learned more from the video than what I've absorbed on this thread so far.  That's how dumb I am.  Se Habla Espanol?  (I don't, either.)

Good luck in your endeavor!

Thank you! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 15, 2014, 10:35:28 AM
It is nice to get some local publicity.

Do you have a filter or screen on the oil supply so lube contaminants do not plug the oil nozzle?

Yup, I will tap oil from the mail oil system so I have an automotive oil filter that takes care of any dirt in the oil.


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on November 15, 2014, 11:02:54 PM
On the gearbox, what viscosity are you using? On every rear differential manufactured over the last 100+ years, none of em use pressure to lube the gear or bearings. There is enough slinging around the case to splash oil everything needed.


Title: Re: APS/Ω Gas turbine bike build
Post by: gidge348 on November 16, 2014, 01:50:45 AM
On every rear differential manufactured over the last 100+ years, none of em use pressure to lube the gear or bearings. There is enough slinging around the case to splash oil everything needed.
You are right, but differentials rarely spin at 50,000 rpm+   :-D :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on November 16, 2014, 12:01:11 PM
On every rear differential manufactured over the last 100+ years, none of em use pressure to lube the gear or bearings. There is enough slinging around the case to splash oil everything needed.
You are right, but differentials rarely spin at 50,000 rpm+   :-D :-D

Well... Thats a new one! I can see the importance now.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 16, 2014, 03:42:38 PM
On the gearbox, what viscosity are you using? On every rear differential manufactured over the last 100+ years, none of em use pressure to lube the gear or bearings. There is enough slinging around the case to splash oil everything needed.

I will tap oil from the main oil pump so I will use regular semi-synthetic 10/40 oil to lube the gears and bearings.

And yes, the revs and the heat demands a high pressure oil jet to get the lube where it is needed and to carry away heat from the metal.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 17, 2014, 05:43:22 PM
Tonight I made the second and last oil jet, this one was for lubricating the gear mesh. Here I am about to drill the hole in the gearbox casing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011765.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011765.jpg.html)

The oil jet nozzle is made in brass with a 1mm hole in the end, should flow enough oil to keep the gears happy.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011766.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011766.jpg.html)

Here the nozzle is in place, the jet is pointing at the pinion gear so the oil will reach the gear before the teeth mesh together.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011767.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011767.jpg.html)

With that taken care of I connected the two oil jets with hydraulic tubes in top of the gearbox and ended it with an AN4 male coupling, a steel braided hose will connect them with the main oil line just downstream the oil filter.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011768.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011768.jpg.html)

Next up is to make the gearbox drain line back to the oil tank, I think I have figured out a good way to do it.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 19, 2014, 05:10:26 PM
I repaired the cracked weld in the oil tank an hour ago, it isnīt very fun to tig weld on an uncleaned oil tank but it turned out pretty ok.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011769.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011769.jpg.html)

With the tank welded and back in the frame I could fit the gearbox and start figuring out how to solve the drain.

You can see one of the two hose connections at the bottom of the gearbox that I will use, a short length of steel tube will be soldered to them inside the gearbox to get enough oil sump height for oil to reach the output bearings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011770.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011770.jpg.html)

Here are the two matching hose fittings made in aluminum that I will weld to the top of the oil tank, they will act both as a vent line for the oil tank (will fit a large breather to the gearbox top) and of course as the drain for the oil injected into the bearings and gear mesh.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011771.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011771.jpg.html)

I will need to buy some 17mm ID hose before I can find the right position of the tank fittings and weld them in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011772.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011772.jpg.html)

As always I put a new layer of coating on the tail fairing plug, not much left to do on it now before it is time to make the mold for the real fairing.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on November 19, 2014, 05:14:53 PM
Anders, you are one hard working guy.

You inspire me. Nothing is too much of an obstacle for you.
Awesome project and you're educating me. :cheers:

Mike.


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on November 19, 2014, 08:26:23 PM
Your GREAT WORK continues...................I assume that brass 3-way junction is attached to the tranny case................


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 20, 2014, 04:49:35 AM
Anders, you are one hard working guy.

You inspire me. Nothing is too much of an obstacle for you.
Awesome project and you're educating me. :cheers:

Mike.

Thank you very much Mike, I enjoy the build so much that it doesenīt bother me at all that I have to do these modifications to the gearbox.

Another factor is that I am only half your age, and we youngsters tend to keep the pace up. :-)

Your GREAT WORK continues...................I assume that brass 3-way junction is attached to the tranny case................

Thanks!

Do you mean that it is secured in the case to avoid vibrations? If so, no but the hydraulic lines are so sturdy that it wonīt be a problem. Especially since the engine itself is vibration free, was it a Triumph engine I would bolt down and lockwire everything twice. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 25, 2014, 12:58:33 PM
Last night was spent in the workshop, first of all I drilled the hole in the oil tank for the oil return from the gearbox. To avoid getting scrap in the oil tank I pressurized it with shop air.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011774.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011774.jpg.html)

Here the hose fitting is welded in place on top of the tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011775.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011775.jpg.html)

My first idea was to fit two drain lines but I had to skip the second one since it would have been placed exactly below the output gear in the gearbox, the reason why that wouldnīt work is because I need to use a snorkel tube to get the wet sump level high enough for the pooled up oil to reach the output bearings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011777.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011777.jpg.html)

To avoid blowing up the oil tank again I fitted a larger diameter vent in the tank lid, a steel braided hose will lead the smoke away from the jet exhaust so it wonīt catch fire.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011776.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011776.jpg.html)

That was the easy part, now for the boring bit. I had to open up the freepower NGV throat area a bit since after finding out that I had made it a bit too narrow, now the throat area is close to 75cm2 which should be equal to a jet nozzle of slightly more than 90mm considering the extra flow restrictions through the NGV and power turbine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011778.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011778.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Rex Schimmer on November 27, 2014, 11:37:17 AM
Anders,
As always great work and impressive parts. I do need to make a comment on your gear box lube system. I appears that your oiling system is designed to directly inject a stream of oil into the pinion/ring gear mesh area as the gears go into mesh. This can cause excessive heat as the oil is trapped by the gears into the root area of the mesh and this can cause the oil to be at a very high pressure for a short period of time which takes horsepower and generates heat. My experience is with high horsepower milling spindles and we found out that if you wanted to lube a set of gears with a stream of oil you needed to inject the oil on the gears as they come out of mesh. Enough oil was retained by the gears to provide lubrication to the gear mesh area and the extra oil that was thrown of by the rotating gear would provide cooling. In really high speed spindles, 10,000 rpm +, we would fill the gear case with a mist of oil which lubed the gears.

Rex



Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 27, 2014, 03:56:07 PM
Anders,
As always great work and impressive parts. I do need to make a comment on your gear box lube system. I appears that your oiling system is designed to directly inject a stream of oil into the pinion/ring gear mesh area as the gears go into mesh. This can cause excessive heat as the oil is trapped by the gears into the root area of the mesh and this can cause the oil to be at a very high pressure for a short period of time which takes horsepower and generates heat. My experience is with high horsepower milling spindles and we found out that if you wanted to lube a set of gears with a stream of oil you needed to inject the oil on the gears as they come out of mesh. Enough oil was retained by the gears to provide lubrication to the gear mesh area and the extra oil that was thrown of by the rotating gear would provide cooling. In really high speed spindles, 10,000 rpm +, we would fill the gear case with a mist of oil which lubed the gears.

Rex



Hi Rex,

I totally agree with you and Iīve been discussing this with my australian friend who has helped me a lot with the calculations during the engine project, he is well aware but feel like it is a fair trade off since in his opinion oil directed on the gears anywhere but where they mesh would sling off and not do any good at all.

The primary gear will rev over 30.000rpm at full throttle so I tend to agree with him, but I am very interested in your opinion about this so please correct me if I am on the wrong track.

To get oil to the gearbox I found that a connection fitted on the regulator block would be best, it is upstream the oil filter but Ernie has sponsored me with some really nice steel mesh AN filters that I will fit to the oil hose.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011780.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011780.jpg.html)

Drilled and threaded for an AN4 fitting!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011781.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011781.jpg.html)

Here the regulator is back in place with the added fitting, it turned out very neat IMHO.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011782.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011782.jpg.html)

To avoid damage to the gears and bearings I modified the oil drain plug to hold a neodymium magnet that will capture any metal flake floating around in there.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011783.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011783.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Rex Schimmer on November 27, 2014, 04:19:07 PM
Anders,
At 30K rpm I think you will have a few lubrication "challenges". One thing I would highly recommend is that you have a temp pick up on the gear case to monitor oil temp, with that pinion screwing oil into the gear mesh at 30K I might be concerned. At that speed it may all be a mot point as the gear may just turn all of the oil into a mist and you will get the mist type of lubrication that is common in high speed transmissions. Keep us informed.

Rex


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on November 27, 2014, 06:41:39 PM
How are you reducing the rpm from 30 grand to the slower speed needed to turn the engine sprocket?  It seems the ring and pinion gear alone is not enough reduction.


Title: Re: APS/Ω Gas turbine bike build
Post by: Rex Schimmer on November 27, 2014, 08:25:06 PM
Anders,
Go to this web site and down load the tech article on high speed gear lubrication.  http://turbolab.tamu.edu/proc/turboproc/T33/t33-06.pdf

Interesting reading.

Rex



Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 28, 2014, 12:59:22 AM
How are you reducing the rpm from 30 grand to the slower speed needed to turn the engine sprocket?  It seems the ring and pinion gear alone is not enough reduction.

The gearbox has a 5:1 reduction so the front sprocket will have a max rev of 6000rpm.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 28, 2014, 04:40:50 PM
Anders,
Go to this web site and down load the tech article on high speed gear lubrication.  http://turbolab.tamu.edu/proc/turboproc/T33/t33-06.pdf

Interesting reading.

Rex



Hi Rex,

Very interesting reading indeed, and it somewhat confirmed my idea that the downside with post-mesh lubrication is acceptable compared to the alternative with all kinds of gear teeth damage.

If you consider the way the gearbox will work during a run it should probably work with injecting oil into the mesh, the gearbox will run from 0 rpm all the way up to 30.000/6.000rpm at the end of the run a couple of kilometers down the track so it will only see full revs a short while before I reach the end of the track.

Do you have a guess how much power I might lose on pre-mesh injection?

Industrial gears with 10.000h of life expectancy face all kinds of long term problems that I wonīt have to deal with, I will happily change gears every 2 hours or so since that equals several years of racing.  :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on November 28, 2014, 08:50:50 PM
Micro shot peening can roughen the surface so it retains lube better.  It is something I use on the race motor in places where I am worried about getting and retaining enough oil.  It seems to work.  An opinion from an expert on surface finishes might be worthwhile.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 29, 2014, 01:18:48 AM
Damnit, I made an error in the previous post. This is what it would have looked like, I blame the beer. :-)

"Very interesting reading indeed, and it somewhat confirmed my idea that the downside with pre-mesh lubrication is acceptable compared to the alternative with all kinds of gear teeth damage."

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on November 29, 2014, 04:02:13 PM
Beer induced mistakes are allowed on the board..............not on the build :-D :-D :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on November 29, 2014, 05:15:34 PM
Thats a rule I can abide. :-)

I am currently walking around like an 90 year old man, tried my first marathon today where we were 40-ish runners in a group dressed up for the swedish lucia event. We ran for 4 hours and 30 minutes and I can feel it in my knees right now, luckily most of it can be cured with beer I think.  :-D

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/10502434_10152638494569842_6952223008984673732_n.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/10502434_10152638494569842_6952223008984673732_n.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on November 29, 2014, 10:05:57 PM
Nope... that's gonna take whiskey  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on November 29, 2014, 10:54:52 PM
I second that. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 01, 2014, 05:01:52 PM
Dear Mr. Johansson,

Congratulations! The Gas Turbine Landspeed Motorcycle is an amazing project and you were able to drive a great amount of votes.

You have won the November round of the Boca Bearings Innovation Contest! Kindly inform me of your shipping address to which we can send your Go Pro camera.

Best regards,

Thiago Medeiros


 :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on December 01, 2014, 05:09:00 PM
Congrats. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on December 01, 2014, 05:17:45 PM
Congratulations. I've got to say though, that's a lot of work just to win a camera!!!  :-D :-D :evil:

Well done Anders.

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on December 01, 2014, 05:37:23 PM
Very well deserved, Anders  :cheers:  :cheers:

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: generatorshovel on December 01, 2014, 06:37:44 PM
Congratulations Anders , you achieved the win without a facebook account ! that's a 1st  :cheers:
Tiny


Title: Re: APS/Ω Gas turbine bike build
Post by: charlie101 on December 01, 2014, 11:08:39 PM
Great! Now we might get to see some great videos...right?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 02, 2014, 09:46:09 AM
Thanks a lot! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on December 02, 2014, 10:30:50 AM
Well done Anders. :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: JimL on December 02, 2014, 09:49:47 PM
Hooray...you've made my day! 

For the FIRST time in my life, something I voted for finally happened!  It feels pretty good, I tell you. :-)

(picture a Snoopy happy-dance...but I'm too old for that)
 :cheers:

Thanks for putting us in your project, we really enjoy it.

JimL



Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 03, 2014, 04:59:48 PM
Thank you for following the build and commenting, the build thread would be very boring without you guys. :-)

Yesterday I picked up a set of spiked tyres for the bike that a guy here in Sweden has made, I managed to make three holes in myself from the spikes while I was loading them into the trunk so they are sharp... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011785.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011785.jpg.html)

I checked the To Do-list and found that most of the modifications were made, so I started assembling the gearbox.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011786.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011786.jpg.html)

The new ceramic hybrid bearings were installed on the power turbine shaft.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011787.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011787.jpg.html)

With the first one fitted I pulled the seals and washed all of the grease away with kerosene.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011788.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011788.jpg.html)

Here the gearbox is assembled, I have some shimming left to do to get the gear mesh play perfect but that will have to wait until next time.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011789.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011789.jpg.html)
 
Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on December 03, 2014, 06:34:03 PM
I managed to make three holes in myself from the spikes while I was loading them into the trunk so they are sharp...

not counting my nose and ears, I have 3 holes myself.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on December 03, 2014, 10:41:39 PM
The Triumph had a problem with cylinder and piston wear a few years ago.  The bores and pistons looked great after the last tear down.  They were the best I have seen in any engine I have ever had, and the motor was run for two years at Bonnevile and it had lots of dyno runs on it.  A few changes were made like switching to big foam air filters so it is hard to say if any one thing was responsible for the improvement.

The pistons, gudgeon pins, rings, bores, and bearing shells were treated using a process by www.wpctreatment.com (http://www.wpctreatment.com)  It was done in So Cal.  The process is Japanese so it might be available in Europe.  This might help your gears to last longer.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 07, 2014, 12:55:35 AM
not counting my nose and ears, I have 3 holes myself.

If I didnīt know better I would think that you are flirting with me.  :-)

The Triumph had a problem with cylinder and piston wear a few years ago.  The bores and pistons looked great after the last tear down.  They were the best I have seen in any engine I have ever had, and the motor was run for two years at Bonnevile and it had lots of dyno runs on it.  A few changes were made like switching to big foam air filters so it is hard to say if any one thing was responsible for the improvement.

The pistons, gudgeon pins, rings, bores, and bearing shells were treated using a process by www.wpctreatment.com (http://www.wpctreatment.com)  It was done in So Cal.  The process is Japanese so it might be available in Europe.  This might help your gears to last longer.

Very impressive results, if I find any wear on the sprocket teeth I will look into this treatment! Thanks for the idea!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 07, 2014, 12:56:35 AM
Last night there was a big christmas party at my work, hundreds of finely dressed people I had hardly even met before, lots of food and a well known band that would entertain us after the dinner. After the main course I couldnīt stand it any more so I sneaked home, found a beer in the fridge and went out to the workshop instead. A bit less crowded there. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011791.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011791.jpg.html)

In the pic above I am modifying the exhaust housing for the power turbine a bit to make clearance for the oil line to the gearbox, it also makes the gas passage a bit smoother than before. Below I have fitted the housing to the gearbox and thread locked the bolts in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011790.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011790.jpg.html)
 
Here the freepower assembly is put back in the frame, since the gearbox anchors the entire engine package it needs to be firmly mounted.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011792.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011792.jpg.html)

To allow for some thermal expansion of the oil tank I filed the mounting holes a bit, John suggested this earlier but I kind of forgot about it. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011793.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011793.jpg.html)

Since I take the oil for the gearbox from the regulator before oil filter I fitted one of the steel mesh filters that Ernie so kindly sent me earlier, this turned out very neat and I can easily open the filter to check for debree after the engine has been run.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011794.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011794.jpg.html)

With eveything attached to the oil tank I could fill oil, plug the main oil line to the gas producer and test the gearbox lubrication. It worked like a charm, no leakage past the piston ring seal and a steady flow of oil through the hose from the gearbox sump down to the oil tank. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011795.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011795.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on December 07, 2014, 02:14:33 AM

With the first one fitted I pulled the seals and washed all of the grease away with kerosene.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011788.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011788.jpg.html)


 
Cheers!
/Anders

Anders
I'm not convinced the washing the grease out with kerosene is a great idea on a high rpm bearing. Something to do with the dye and the residue left by the Kerosene
I generally use Shellite as it's doesn't have any of that stuff,

I used to dread Christmas. having to spend time with a family that I can take on or two at a time but not as a whole group. And then their is her family...
now I've worked out that the only people that bother me on christmas day, in the workshop, are the security company.
Great day for porting heads
G


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on December 07, 2014, 09:01:39 AM
not counting my nose and ears, I have 3 holes myself.

If I didnīt know better I would think that you are flirting with me.  :-)

loloutloud .


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on December 07, 2014, 12:15:15 PM
Grumm;

The best all- around solvent that I've found for grease & oil is Stoddard Solvent. VM & P naptha, MEK, trichloroethylene, or even methylene chloride is a good solvent.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: ChrisLenahan on December 07, 2014, 01:01:46 PM
Having been the chief inspector in a turbine overhaul shop before - do not clean titanium parts with trichloroethylene.  Every manual I have seen for a turbine engine carries a warning not to use it on titanium parts.  they can react and form a poisonous gas.  Same goes for Magnesium.  Look up the MSDS sheet on it.  It works great as a solvent but so did gasoline with Tetra Ethyl Lead.


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on December 07, 2014, 07:15:26 PM
Lets face it, all the good solvents are bad for grease and humans.  Used all the good ones when I was working airplanes... didn't affect me at all.... didn't affect me at all.... well it didn't seem affect me at all.... OK, it didn't kill me yet....  :-o


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on December 07, 2014, 11:31:32 PM
We used a few of those solvents in the highway department to dissolve asphalt out of pavement samples.  Comparing the before and after weights and volumes told us the asphalt content of the pavement.  Use of some of those and especially trichlor when I was a mechanic gave me an overexposure allergy.  The reactions I get to new rugs, cigarette smoke, and a few other common things are pretty bad.  It is best to avoid the toxics so there are limited long term effects.

The local industrial supply should know about some safe solvents that clean well.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 08, 2014, 05:58:25 PM
Grumm441: Iīve never heard that kero can leave any harmful residues in bearings, the RC turbine builders run oil mixed kero through their bearings as lubrication and they run their ceramic bearings to >120.000rpm. Iīll keep it in mind though in case I need to do it again, I have better solvents on the shelf that I just didnīt think about using.

A couple of hours ago I went to the shed to do some modifications to the interstage duct, something that has been bothering me is that I didnīt make any alignment edge on the V-band flange that connects the gas producer and the interstage duct. This makes assembly a bit difficult since I need to manually align the flanges while tightening the clamp, and even the slightest offset cause a restriction to the flow.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011796.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011796.jpg.html)

To fix this I drilled a pair of holes in both flanges for spring pins, before anyone comments on it I covered the turbine exit before drilling to avoid getting any metal shavings into the engine. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011797.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011797.jpg.html)

Here you can see the holes, the fit is very snug and will ensure a perfect alignment of the flanges. Neat! :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011799.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011799.jpg.html)

Next up was to fit one of the high quality Fluke thermocouples a guy here in Sweden sent me for free, I will use both the old thermocouple and this one to see if there is any difference between the two.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011800.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011800.jpg.html)
 
Before I called it a night I cut away some material from the air box entry, this way I should be able to remove the gas producer from the frame without having to pull the entire freepower section backwards a centimeter.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011801.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011801.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 11, 2014, 03:20:48 PM
I tried my best to take a picture of some TIG welding last night but failed miserably, perhaps if I had two more hands...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011802.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011802.jpg.html)

At least the welds got done like they were supposed to.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011804.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011804.jpg.html)

Boy does it feel good to put the bike back together after having had it scattered all over the workshop for a couple of months!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011805.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011805.jpg.html)

To get the V-band flange to align properly I made some schims out of a beer can and fitted them under the gearbox mounts, who said beer drinking was all bad?

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011806.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011806.jpg.html)

Now we are talking! Perfect alignment and with the two spring pins the V-band flange fit couldnīt be better. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011807.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011807.jpg.html)

Here both the new Fluke thermocouple and the P4 probe are fitted, the only empty space in the frame is starting to fill up.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011808.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011808.jpg.html)

Finally the engine is back in the frame, next up is to make a couple of new mounts for the gauges and get the rear fairing done.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011809.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011809.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on December 11, 2014, 07:19:00 PM
Anders;

It is now time to ask the beer company for some sponsorship money!  :cheers:

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 12, 2014, 12:01:30 AM
That particular beer brand has a place close to my heart, it is called Norrlands Guld as a celebration to the neglected and generally despised part of Sweden that in weather reports is referred to as Norrland and consists of the upper half of the country.

In the TV commercials we are pictured as something best described as canadian loggers with their tounges cut out, the main attempt of vocal communication being the sound from quickly inhaling air through an almost closed mouth around your front teeths. We use as a sign of aprovement so we donīt actually have to say something. :-)

http://youtu.be/OK9BU9q9pac


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on December 12, 2014, 12:30:41 AM
I get it....https://www.youtube.com/watch?v=xNhOW9JVYzs


Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 13, 2014, 05:45:57 PM
Neil: Yup. ( or should I say schuuu) :-D

After a day with unusually cranky kids it was pure pleasure to spend a couple of hours in the workshop with Motörhead on full volume. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011815.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011815.jpg.html)

My first job was to fit the fairings but I ran into trouble when I realised that the brake line I ordered for the front wheel was so short that the brake lever hit the fairings when turning, to avoid cutting away more of the fairings I decided to get a new and slightly longer brake line made.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011814.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011814.jpg.html)
 
With the fairings finally in place I could make a couple of mounts for the T2 and P4 gauges, I am glad that I wonīt have to fit much else in there because it is pretty filled up now. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011813.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011813.jpg.html)

Since there was no way I could fit the tachometer so the Gopro camera mounted between the handlebars would see it I fixed it in place on top of the air box where at least I can see it myself. Later I will figure out a way to use a similar dashboard gauge like for the T2 so I can fit it right beside the rest of the gauges.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011816.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011816.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Scottie J on December 13, 2014, 10:00:40 PM
Wow!     :-o   You've really come a long way since the last time I looked at this thread.  Bike looks amazing!  Great work!     :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Frenchinjection on December 15, 2014, 09:13:50 AM
Looks like you are going to need a bigger dash soon:-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 15, 2014, 04:44:03 PM
Thanks Scottie, it sure has come a long way since I began the project five years ago.  :-)

Hopefully I wonīt have to fit much more stuff to the dashboard. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on December 15, 2014, 07:50:12 PM
Your going to need a camera soon to see where your going  :wink:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 19, 2014, 12:35:36 PM
Ha ha, I hope it wonīt come to that... :-)

My friend Olov toasted his leg when we burned a hole in the jet kick afterburner, another friend very cleverly named the damage "Jet Leg".  :-D

To avoid suffering the same fate as Olov I had to make a proper heat shield around the freepower housing.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011817.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011817.jpg.html)

There is a distinct smell from cutting plastic coated stainless sheet with an angle grinder so I got a bit nostalgic thinking about the pulsejet building days. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011819.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011819.jpg.html)

Making a couple of sturdy fixing points for the heat shield.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011820.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011820.jpg.html)

I might have to dull the heat shield a bit to avoid blinding the speaker at Speed Weekend. :roll:

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011821.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011821.jpg.html)

I have also managed to get a longer brake hose made so now the grip wonīt touch the fairings when I steer the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011818.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011818.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on December 19, 2014, 05:49:02 PM
Your levers will need 1/2-inch or larger balls on their ends to run at the Salt Flats...................Its a safety thing........no hole-punch devices are allowed to protect the rider in the case of a 'tumble' on the course. Some riders prefer the short levers for increased fairing clearance.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 20, 2014, 12:36:49 AM
Your levers will need 1/2-inch or larger balls on their ends to run at the Salt Flats...................Its a safety thing........no hole-punch devices are allowed to protect the rider in the case of a 'tumble' on the course. Some riders prefer the short levers for increased fairing clearance.

The plan was to buy a pair of those stubby china grips but I forgot all about it, thanks for reminding me.

Will the round end of those get me through tech inspection?

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/_12.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/_12.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on December 20, 2014, 05:31:28 AM
Anders, is your front fender mounted to pre-existing tabs on the sliders or did you make something up? I'm not wild about using only clamps to mount my fender and it's not an area I want to weld on.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 20, 2014, 03:09:52 PM
Anders, is your front fender mounted to pre-existing tabs on the sliders or did you make something up? I'm not wild about using only clamps to mount my fender and it's not an area I want to weld on.

Iīll take some pictures of how I did it after the holidays when I get back home.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 24, 2014, 05:16:42 AM
Merry Christmas fellow landracers!!! :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on December 24, 2014, 11:01:40 PM
Merry Christmas, Anders.  It is a big deal where you are to know the days are getting longer and a bright new year is on its way.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 30, 2014, 04:37:25 PM
Thanks!

I started making the glass fiber fairing a couple of days ago, the plan was to make a negative mold on the styrofoam plug to cast the real fairing in but since I am a bit pressed on time with the race coming up in less than two months I decided to make the fairing directly on the plug instead.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011822.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011822.jpg.html)

To keep the polyester from melting the styrofoam I covered the plug in both tape and plastic foil, I was a bit nervous since I hadnīt done this before and on top of that had decided to cut some corners with the directly-on-plug casting.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011824.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011824.jpg.html)

After four layers of woven glass fiber put on two layers each day with time for it to cure in between it looked like this. I let it rest until today and after an 18km night run with a friend I decided to see how it turned out.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011825.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011825.jpg.html)

Not bad at all! Much better than I could possibly have guessed in fact. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011827.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011827.jpg.html)

I have only trimmed the fairing sides with an angle grinder so the fit against the frame will be better later when I have spent some more work on it, it looks to have a very snug fit against the top of the tyre but there is >5cm clearance which is good since the spiked tyre will need some extra space.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011828.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011828.jpg.html)

I havenīt decided yet if I should leave the opening as it is or block it off with a sheet of aluminum, I would appreciate suggestions from someone who is into bike aerodynamics about this.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011829.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011829.jpg.html)

Anyway, I am very pleased with how it turned out. Some glass fiber putty, a bit of grinding and a layer of 2K paint and it will look even better. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on December 30, 2014, 08:49:25 PM
You did a nice job on the glass work. :cheers:

You're a natural, it looks great.

I'd leave the back open.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on December 31, 2014, 01:47:42 AM
Thanks a lot Tauruck! :-)

It "looks right" to the eye to have an open rear end so with you confirming this Iīll leave it as it is, might be that I have to fit a strip of aluminum on the inside to hold the shape symmetrical.

A set of DZUS locks have been ordered from UK, should arrive in the middle of january.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: MattGuzzetta on December 31, 2014, 11:55:01 AM
Anders, I have enjoyed followiing your build, very impressive!  Your workmanship looks great and the work on the plug looks really nice. I have a suggestion for you to try next time you are doing some glass work.  I learned a trick about trimming the excess glass when doing a lay up.  You can trim the glass with a razor (blade or box cutter type tool) when the resin has kicked, but is not hard.  There is a "sweet spot" in time that allows you to just run the blade around the edge and cut the cloth and mat easily.  It makes for less grinding, the part of fiberglassing that is the least liked!
Keep the build info coming, you are an amazing guy! :-D
Matt Guzzetta


Title: Re: APS/Ω Gas turbine bike build
Post by: JimL on December 31, 2014, 08:59:58 PM
...and a roofers "hook knife" is really great because it is really easy to steer!  The extra grip and power buy you just a little more trimming time as the resin kicks off.

J


Title: Re: APS/Ω Gas turbine bike build
Post by: tallguy on January 01, 2015, 01:39:07 AM
Anders, that's a great-looking bit of fiberglass work.  Regarding airflow,
I have a concern about air from underneath trying to lift the fiberglass
section from the bike.  You might want to think about adding some
thickness for strength, and a generous amount of bracketry and
fasteners to hold it all attached.  Leaving the back end open should
help by giving air a place to exit.  Good luck.


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on January 01, 2015, 03:34:13 AM
Anders, the work looks fine but I think you can go one better. To reduce drag, the tail section should be the same size as your butt/hips and then taper back to your Kamm tail. As it is, it looks like you're going to get a lot of drag right behind your backside (and legs).
 Just sayin'.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 01, 2015, 03:24:12 PM
Matt & Jim: Thanks for the advise, Iīll try that the next time I do glass fiber work.

Tallguy: Good pointer about lift, Iīll make sure to clamp it down as good as I can. Perhaps a strip of stainless steel fixed to the inside of the fairing with a couple of layers of glass fiber mat?

Sofadriver: You are absolutely right, my behind will be a bit higher than the front of the fairing. Consider this a work in progress, with the fairing done I can later add styrofoam to get the right shape and make a mold for the MK2 fairings.

Right now I just need to get a fairing on the bike and get some seat time, later on I can start chasing down the causes of excessive drag.

Cheers guys!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on January 01, 2015, 05:47:07 PM
Anders, I have enjoyed followiing your build, very impressive!  Your workmanship looks great and the work on the plug looks really nice. I have a suggestion for you to try next time you are doing some glass work.  I learned a trick about trimming the excess glass when doing a lay up.  You can trim the glass with a razor (blade or box cutter type tool) when the resin has kicked, but is not hard.  There is a "sweet spot" in time that allows you to just run the blade around the edge and cut the cloth and mat easily.  It makes for less grinding, the part of fiberglassing that is the least liked!
Keep the build info coming, you are an amazing guy! :-D
Matt Guzzetta

Matt, you've worked with glass. :cheers: :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on January 01, 2015, 09:56:42 PM
....... my behind will be a bit higher than the front of the fairing. Consider this a work in progress, with the fairing done I can later add styrofoam to get the right shape and make a mold for the MK2 fairings
/Anders

ya' know, Anders, that gives me an idea. I might just make my inner fender (required to keep the insides of my thighs off the tire) and the tail fairing as one (hollow) unit. It would be stronger, less prone to flexing and easier to mount.

love how this place gives me new ideas.



Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 03, 2015, 11:21:53 AM
These kind of forums never seizes to amaze me, there is always someone who helps out or gives a hint in the right direction for a problem that needs to be solved. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 06, 2015, 05:00:47 PM
Hi guys! After a long Christmas vacation it was time to pull the thumbs out and get some work done on the bike!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011831.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011831.jpg.html)

I made a template for the side covers on the rear frame, I will cut them out in sheet metal later this week. I also removed some material from the jet exhausts to get the exhaust angled more towards the rear than straight out.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011833.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011833.jpg.html)

After that I fixed some bits and pieces, changed the emergency stop to an NC instead of the NO I accidentally bought earlier, got all air out from the front brake system, started planning for a metal front fender for the spiked tyre, did some more planning on a fire extinguisher built from a Soda Streamer gas bottle and played some Slayer while cleaning up the workshop. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011834.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011834.jpg.html)

I have made a long list of stuff I need to get for the bike so hopefully I can source all of it in a week or two, I will try to have the bike ready as soon as possible so I wonīt have to work all night before hauling it to Speed Weekend.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: 55chevr on January 06, 2015, 07:52:16 PM
no matter how you do it there will be wrenching at midnight the day before.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on January 06, 2015, 09:43:32 PM
Anders, it is not hard to split a fiberglas part down the middle and to add a section between the halves to make it wider.  It is a lot quicker than starting over from the beginning.  You can also trim the halves and splice them together to make the assembly narrower, if desired.

This is how I do fiberglass jobs 'cause I do not get too excited about working with the stuff.  It is to order something that looks reasonably good from aerotech and to cut and splice it to the final dimensions.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 07, 2015, 06:10:57 AM
no matter how you do it there will be wrenching at midnight the day before.

Very true, we usually get more done the last week before the race than during the rest of the year. :-)

Wobblywalrus: Exactly, when I have this fairing in place I have something to work on. Later I will have to get serious with the aerodynamics since I wonīt have an excess of power with this engine (150RWhp or slightly more) but first I need to make the drive line as bullet proof as possible.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 17, 2015, 04:48:23 PM
Lately Iīve been busy doing lots of non-turbine related stuff, but today I actually got some work done in the workshop! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011838.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011838.jpg.html)

I had to make a temporary front fender to keep bits of the ice track from entering the air intake, so I borrowed my Triumph bobber fender and made some new brackets for it. The front bracket looks a bit weak from the picture but it is sturdier than it looks so I think it will do for a 200km/h run. Canīt go any faster with spiked tyres and 150hp.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011839.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011839.jpg.html)

With the fender paint drying I made new brackets for the brake fluid containers, earlier I used zip ties but that was not exactly practical.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011840.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011840.jpg.html)

Just when I had finished that my friend who would paint the fairings called and told me that they were ready so I jumped in the car and picked them up. My very crappy pre-paint job shines through but it is a race bike so as long as it looks good at 200mph I am satisfied. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011841.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011841.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on January 17, 2015, 09:29:22 PM
That color looks like Polar White.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 18, 2015, 03:51:56 AM
There is a tad more yellow in the white than the picture suggests, somewhere towards cream white. Itīll hopefully look great against the black frame.  :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 18, 2015, 03:14:07 PM
Today my good friend Olle came by to help me fit the spiked tyres, he is in the middle of fitting a pair of Roots compressors to his Rolls Royce Meteor V12 equipped tractor puller so I am glad that he could find the time to help out.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011842.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011842.jpg.html)

Olle has learned the hard way that it can and most often will hurt to fit spiked tyres, this is a picture from 2013 years Speed Weekend when he and a couple of equally Plymouth drunk guys tried to replace a blown tyre on his turbo motorcycle in the middle of the night. When they were finished they had lots of holes in them and it was blood all over the place... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Isda3080ckiOrsa.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Isda3080ckiOrsa.jpg.html)

It went really well actually, with spiked tyres you need an inner hose (correct name?) to keep the air in and it is very easy to make a hole in it with the tyre irons.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011844.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011844.jpg.html)

My daughter Agnes decided to help out by dropping the washers for the front fairing down the workshop floor drain. :-D

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011843.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011843.jpg.html)

Before we changed the front tyre we fitted new ceramic wheel bearings.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011845.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011845.jpg.html)

With the wheels in place again I could fit the fairings to check of the clearance to the spikes would be enough, at least 3cm all over so I am satisfied. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011847.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011847.jpg.html)

The color is towards cream white and I think it suits the black frame nicely, Iīll try to get the wheels and the aluminum tanks painted in the same color this summer.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011848.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011848.jpg.html)

Enough clearance for both the spikes and the front fender, perfect!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011850.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011850.jpg.html)

With Olle as camera man I got some shots on the bike with me on it, it will be a bit tighter with the helmet and the leathers on but still plenty of space for legs and arms.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011853.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011853.jpg.html)

Not easy to get the head down and still see where I am heading... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-011854.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-011854.jpg.html)
 
Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on January 18, 2015, 03:26:46 PM
Great progress Anders. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on January 18, 2015, 11:52:40 PM
You've done a great job on your build Anders.

Thanks for all the posts. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 19, 2015, 02:59:36 AM
Thanks! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on January 19, 2015, 10:51:37 AM
Excellent work. I really dig the paint. Contrasts the frame nicely.

 :cheers:  :cheers:  :cheers:  :cheers:  :cheers:  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on January 19, 2015, 11:09:00 AM
Agnes is a cutie. It's nice to have help in the shop.  :-D

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on January 19, 2015, 09:52:49 PM
That tire changing party looks like it was fun.  Here in Oregon it gets cold during the off season when we change out the tires.  The tire is put near the wood stove so it gets nice and warm, then one bead is put on and the tube inserted.  Next, the wheel is put back near the stove to reheat.  Then the last bead is fitted.  Tires, like other things, are easier to mount when hot. 


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on January 19, 2015, 10:32:12 PM
That tire changing party looks like it was fun.  

Yeah, nothin' says "fun" like frozen, bloody fingers.  :roll:

Anders, there must be some weirdness to riding on spiked tires. What's it like?


Title: Re: APS/Ω Gas turbine bike build
Post by: Rex Schimmer on January 20, 2015, 02:33:43 PM
Anders,
Those tire are "frightening"!!!! Hard to even imagine that the spike will stay in the tire at 150 mph.

A note on mounting tires to avoid pinching the inner tube.
Never ever pull the tire iron over a 90 degree angle to the wheel. Pull it to 90 deg and then push the tire on with your boot. Once you have pulled the tire iron over 90 deg you will catch the inner tube and press it against the wheel and most likely put a hole in it. Also move the tire irons around the wheel in small increments, no big bites. I like to spit on the tire irons to add some lube but a quick dip in some oil works also.

Nice progress, can't wait till you run this beast!

Rex


Title: Re: APS/Ω Gas turbine bike build
Post by: Crackerman on January 20, 2015, 05:01:00 PM
How much will that tire grow at speed with all that hardware in it? It looks mean!!!


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on January 21, 2015, 01:05:29 AM
Anders, check your rule book.  Some organizations want contrasting colors on white bikes.


Title: Re: APS/Ω Gas turbine bike build
Post by: Stan Back on January 21, 2015, 12:26:04 PM
Black tires and frames and roll cages, etc., count on that rule written for both cars and bikes.  The SCTA rules were, I believe, intended for small, streamlined and enclosed vehicles.


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on January 21, 2015, 01:57:45 PM
Any white vehicle is difficult to see. Having been in the timing trailer for many years even a vehicle with a red stripe are hard to see,in many cases we don't see them until they pass in front of timing.Even the emergency equipment has trouble finding them .


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 22, 2015, 05:03:39 AM
Lsrjunkie, wobblywalrus, Stan Back & Glen: That is a very valid point about the contrasting color. There is nothing in the Swedish LSR regulations that prohibits white so until they change or I start to get the bike ready for a trip overseas I will keep it this color.

Where is the line drawn for a contrasting color by the way? If the bike is white with a black frame and lots of coloured stickers on the rear fender, would it still count as white or would the whole bike need to be painted in a dark color to pass inspection?

Sofadriver & Rex Schimmer: I really have no idea, this will be my first experience with spiked tyres on a motorcycle. A local guy has ridden a turbocharged hayabusa at 300km/h with tyres build this way so I am fairly confident that the spikes will stay where they are and not break free.

Crackerman: The guy who built them told me to leave at least 25mm clearance to the fairings for tyre expansion at speed.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 25, 2015, 05:21:44 PM
It is actually possible to print other items than male reproductive organs on the 3D printer, the last couple of days Iīve been printing all sorts of useful stuff on it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201855.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201855.jpg.html)

Amongst other things I have made a slim case and some practical mounts for my Gopro cameras, the idea with this mount is to rivet it to the rear fairing so I can aim a camera backwards, this will both produce a fun camera angle and help me see if there is any signs of oil smoke in the jet exhaust.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201856.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201856.jpg.html)

Today my oldest daughter wanted to help me out with the bike so we spent an hour in the workshop and got some work done, to make some sort of ice chunk shield for the front fairing air intake Ella salvaged the metal grille from a disposable BBQ while I was drilling the holes for the rear fairing mounts.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201857.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201857.jpg.html)

I cut the grille to shape so Ella could spray paint it black, really fun to be able to do stuff like this with the kids and especially when they are the ones who want to do it. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201858.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201858.jpg.html)

Here the rear fairing is in place, first I considered DZUS locks but since the fairings need a bit of juggling to get in place I decided that M6 bolts are much more thrustworthy. The main power switch is easy to maneuver and not in the way of anything in this location.

Iīll fit larger washers later so the fairing wonīt crack around the holes. (there is a long strip of metal riveted along the inside of the fairing edge so the four M6 bolts are enough to secure the whole fairing)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201859.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201859.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on January 25, 2015, 05:47:06 PM



One thing I didn't mention is the timing trailer is 800 to 1000 feet from the course, so it's about 1/4 of a mile before we can see such vehicle. The color matters .        link=topic=12527.msg268678#msg268678 date=1421921019]



Lsrjunkie, wobblywalrus, Stan Back & Glen: That is a very valid point about the contrasting color. There is nothing in the Swedish LSR regulations that prohibits white so until they change or I start to get the bike ready for a trip overseas I will keep it this color.

Where is the line drawn for a contrasting color by the way? If the bike is white with a black frame and lots of coloured stickers on the rear fender, would it still count as white or would the whole bike need to be painted in a dark color to pass inspection?

Sofadriver & Rex Schimmer: I really have no idea, this will be my first experience with spiked tyres on a motorcycle. A local guy has ridden a turbocharged hayabusa at 300km/h with tyres build this way so I am fairly confident that the spikes will stay where they are and not break free.

Crackerman: The guy who built them told me to leave at least 25mm clearance to the fairings for tyre expansion at speed.
[/quote]


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 26, 2015, 03:02:11 PM
One thing I didn't mention is the timing trailer is 800 to 1000 feet from the course, so it's about 1/4 of a mile before we can see such vehicle. The color matters .

Copy that! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on January 26, 2015, 11:54:22 PM
Almost 30 years ago the highway department stationed me in Bend, Oregon.  It is cold there.  Rose had the truck so I put Trelleborg military knobbies on an Xt-500 Yamaha so I could get to work and back. I had no money for another truck.  The 'borgs are spiked tires.  The setup worked good.  I shot out of the heated garage, climbed over the berm along the road edge made by the snowplow, and rode to work.  My shortcut was riding on the ice on a frozen stream.  It too a few minutes more to use this route but it was worth it.

The bike will handle differently with the spikes.  Take it easy for the first few runs so you get used to them.  They are not bad.  In fact, the bike should handle very good. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on January 27, 2015, 03:45:02 AM
I havenīt heard anything negative from the guys I know who run spiked tyres, all they say is that the grip is insane with these kind of spikes. Another plus is that I will only go in s straight line and not around any corners at speed so I think I will be fine. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 02, 2015, 04:56:08 PM
To be able to quickly put out any fire after a run I decided to make a compact CO2 extinguisher that I can fit to the bike, a Soda Streamer bottle was perfect for this.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201860.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201860.jpg.html)

I managed to find a guy who sells adapters for the special bottle neck thread and a ball valve on top of that makes a very compact fire extinguisher, powder is not an option since it would make a total mess inside the engine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201866.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201866.jpg.html)

During the dinner coffee I drew a CO2 bottle mount in the 3D CAD program Inventor and then the printer had a couple of hours of work to do while I did the dishes and played around with the girls.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201861.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201861.jpg.html)

Here are the two finished mounts, I used a slightly rough setting to cut some printing time since the surface finish didnīt have to be perfect.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201862.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201862.jpg.html)

With the mounts done I could go out to the workshop to see if they would fit the bike, and that they did.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201863.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201863.jpg.html)

Not bad at all! A pair of zip ties secures the mounts to the frame tube and a lenght of vinyl tape around the bottle and frame tube will make sure the CO2 bottle wonīt come off by accident.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201864.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201864.jpg.html)

I am very pleased with the result, this would have taken me the whole evening if I had milled them from a solid block of plastic and now I spent perhaps half an hour making the drawing and setting the printer up. Sweet! :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201865.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201865.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on February 02, 2015, 09:27:43 PM
First a home made jet engine...now a 3-D printer. Wow, what's next, Anders?

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on February 02, 2015, 09:39:18 PM
Anders, you obviously have a better equipped shop than most of us  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on February 02, 2015, 11:51:37 PM
Very cool Anders.
How strong are the printed parts?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 03, 2015, 12:02:07 AM
The PLA plastic is hard but a bit brittle compared to ABS, but it would take a lot more force to break the PLA mounts than they will ever see in this application.

I won the printer in the Boca Bearings competition I wrote about in October, it is very easy to use and will save me countless hours of manual labour on the mill and lathe since I can produce green sand casting patterns with it.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on February 03, 2015, 12:24:07 AM
Not only was the prize deserved, but it's really neat to see it being put to great use. Congratulations Anders!  :cheers: :cheers: :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on February 03, 2015, 01:29:03 AM
Not only was the prize deserved, but it's really neat to see it being put to great use.

Pete, did you miss the part where Anders said "It is actually possible to print other items than male reproductive organs on the 3D printer" ? Obviously some things are better left unseen!

 :-D :-D :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on February 03, 2015, 05:37:27 AM
Tom Evans told me a story about a rider that had got some new white leathers made for him to run at Bonneville
this was also before engine shutoff lanyards were required on motorcycles


Anyhow, our intrepid motorcyclist set off down the course
and due to some sort of speed wobble, he was ejected from his motorcycle
as there was no engine shutoff lanyard, the bike, having ejected the rider
sorted out it's speed wobble and headed off in to the distance, rider less
the course crew, seeing the motorcycle head into the distance called "course clear"
As the rider was lying on the lake, he heard the sound of a car headed his way.
Fortunately, it was a roadster. It span, to the right
The motorcyclist was able to stagger from the course, in his white leathers
to ride another day.
According to Tom, this prompted at least three new rules

it was certainly more entertaining how Tom told it to me, but you get the idea
G




Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on February 03, 2015, 10:47:21 AM
any idea what other rules were prompted ?


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on February 03, 2015, 03:48:33 PM
any idea what other rules were prompted ?

I think it was lanyard and support vehicle
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 04, 2015, 01:51:07 AM
That shows that rules are there for a reason and not just to mess with the drivers, a good reminder grumm441.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 04, 2015, 01:24:23 PM
Speed Weekend is getting closer and closer, only three weeks left until we need to have everything loaded on the trailer! :)

Last night I fitted the front fairing "headlight" screen that Ella and I made last week, it looks a bit better than just a hole in where the crow nest of cables are.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201867.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201867.jpg.html)

After that I improved the riding comfort by a couple of thousand percents, my bony arse needs a bit more cushioning than a sheet of aluminum can provide...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201868.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201868.jpg.html)

I used a self adhering seat foam that road racing bikes use to have, it sticks very good to the aluminum and is quite comfortable despite being quite thin.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201869.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201869.jpg.html)

Time to figure out why the scuba compressor has lost its pressure, I disassembled all three compressor stages, cleaned the valves up and found a missing gasket in the high pressure stage when I compared it to the blueprints. I have found a new gasket that might fit so next time I have some spare time I will fit it and see if I get better pressure out of the compressor.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201870.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201870.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on February 05, 2015, 03:24:47 PM
I used that same type of seat-pad on my latest build.................nice and comfy........but squishes real thin.


Title: Re: APS/Ω Gas turbine bike build
Post by: MattGuzzetta on February 05, 2015, 08:19:01 PM
I don't know where to get it today, but we used to use closed cell vinyl foam on our Vesco Daytona seats. If I remember correctly, it was a material for making boat cushions as it would float.  The material was about 3/4 inch thick and the closed cell nature of the material did not compress much and was like sitting on an air cushion.  Cool stuff if you can get it someplace!  Love your bike, making your own turbine just knocks me out, very cool! :-D

Matt Guzzetta


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on February 05, 2015, 09:19:56 PM
Matt, are you going to run this yeay?

Glen Barrett
Team Vesco.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 07, 2015, 03:50:26 PM
I don't know where to get it today, but we used to use closed cell vinyl foam on our Vesco Daytona seats. If I remember correctly, it was a material for making boat cushions as it would float.  The material was about 3/4 inch thick and the closed cell nature of the material did not compress much and was like sitting on an air cushion.  Cool stuff if you can get it someplace!  Love your bike, making your own turbine just knocks me out, very cool! :-D

Matt Guzzetta

That sounds like a good seat material, Iīll ask some boat guys I know if they have heard of it. Thank you very much for your praise! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 09, 2015, 12:09:43 AM
After spending several hours on the scuba compressor fault finding I finally manage to find the reason for the sudden loss of pressure, it was a leaking spring loaded valve in the filter housing!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201872.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201872.jpg.html)

Since this particular filter housing is quite old and a bit unsafe compared to newer ones (they have been reported to break and blow up according to comments on diving forums) I decided to remove it and run without a filter, I will never use these air bottles for breathing purposes so it doesenīt matter if a bit of oil/moisture gets into them.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201873.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201873.jpg.html)

With that headache out of the way I fitted the second Gopro camera to the rear fairing pointing backwards, I printed a rivet mount on the 3D printer a while ago for this particular reason.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201874.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201874.jpg.html)

Unless I manage to kick it away while mounting the bike it will stay in place. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201875.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201875.jpg.html)

Finally I solved a problem that have bothered me for a while, namely how to fit the towing line to the bike.

With all the fairings on the bike there is no useful attachment in line with the wheels, so how will I get the darn bike back to the pits after the race? I solved it by cutting a length of CrMo tubing that slides down the hole in the steering head, then I can fit the towing line to it above the wind screen. I use hose clamps instead of welded washers so I can adjust it depending on the height of the towing vehicle.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201876.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201876.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on February 09, 2015, 10:17:07 AM
that is a pretty high attachment point for the tow line. A slight off-center tug may topple the works. imo.

A small pit trailer might be a lot safer.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 09, 2015, 11:37:27 AM
Hmm, you are right about that. I think weīll use it anyway though, Iīll have a guy on the tow vehicle hold the line so he can drop it in case I am about to go to the ground. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on February 09, 2015, 11:51:04 AM
Another issue is if you run at a SCTA/BNI meet no one is allowed to ride in the back of the truck.


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on February 09, 2015, 12:09:50 PM
Anders, without nagging at you -- plan on building a better transportation method as soon as you can.  Towing like you're planning is my absolute last option - and, I expect, the same for a vast number of racers on bikes.  After a couple of years we went to a mini-trailer:  The bike could be driven on with no ramp (minimal ground clearance so no ramp required); there was a built-in wheel chock so the rider could put the bike onto the trailer and get off the bike safely -- with NO help from others; there tie-downs on the trailer so the bike could be secured to the trailer, again with no help if necessary; and we went so far as to make the trailer easy to remove wheels so we could then bolt it to the floor of the cross country trailer for easy transport.

It took a few years and a few tumbles.  May you progress without the tumbles!!! :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on February 09, 2015, 03:26:24 PM
if that  tie down bar coming out of the steering head snaps ; you'll be the first to know.


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on February 09, 2015, 03:48:04 PM
Here's what Franey's trailer looks like.  He's the guy that posted immediately above.  Our trailer is pretty much like his.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 09, 2015, 03:49:14 PM
This is a temporary thing for this race only, I will tow the bike in walking speed and the CrMo tubing used for the tow bar wonīt snap so donīt worry. :-)

The idea with the trailer is very good, I will start planning for a simple race track trailer that can be folded and transported without taking up too much space on the "real" car trailer.


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on February 09, 2015, 07:15:43 PM
Don't forget to mount a salt or dirt shield on the front of the trailer, you won't be sorry later.


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on February 09, 2015, 07:22:03 PM
last winter the trailer was lowered. Now I roll up without a ramp.
the rear axle is a half an inch off the ground clearance. The tongue has an inch and a half clearance.

what is basically three main pieces-  the axle which will slide into a receiver hitch, the rail with chock on it and the main frame with the tie downs welded on which hitch pins to the rear axle.
I used to break the trailer down to haul in the old enclosed trailer. Now the pit trailer nests in the new bigger trailer. The motorcycle travels on the pit trailer.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 10, 2015, 03:38:16 PM
Do forget to mount a salt or dirt shield on the front of the trailer, you won't be sorry later.

Roger that.

Exactly how do the salt behave when it is "raceable", is it sticky and smears to everything or is it more like moist beach sand? It it ever dry or do the clay beneath keep it wet all the time?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 10, 2015, 03:49:19 PM
last winter the trailer was lowered. Now I roll up without a ramp.
the rear axle is a half an inch off the ground clearance. The tongue has an inch and a half clearance.

what is basically three main pieces-  the axle which will slide into a receiver hitch, the rail with chock on it and the main frame with the tie downs welded on which hitch pins to the rear axle.
I used to break the trailer down to haul in the old enclosed trailer. Now the pit trailer nests in the new bigger trailer. The motorcycle travels on the pit trailer.

Thats a good thing that the track is very flat, with a high clearance I would have problems getting the bike on the trailer without the underhung tanks hitting the wheel axle.

I have a long way to go before I start planning for the Bonneville trip, I have lots of testing and tuning to do on the local tracks first so I will keep the tow accessories simple at first to get a feel of what I need. At the short test tracks around here there is no need for a trailer to get the bike back to the pits.


Title: Re: APS/Ω Gas turbine bike build
Post by: bak189 on February 10, 2015, 06:54:44 PM
If you race with BMST, you don't need a stinking trailer.....you can ride the bike back to the pit/starting line.....Not with SCTA/BNI........they won't let you ride the bike back....the "good old boys" claim it is not safe.......It is OK. to ride the bike on the track....but not safe to ride it on the return road....................
Funny rules...


Title: Re: APS/Ω Gas turbine bike build
Post by: salt27 on February 10, 2015, 07:15:27 PM
Exactly how do the salt behave when it is "raceable", is it sticky and smears to everything or is it more like moist beach sand? It it ever dry or do the clay beneath keep it wet all the time?

Short answer is YES. Better answer is, it can be hard and not much accumulation (haven't seen that in a while) or wet and very sticky with lots of accumulation and any where in between the two.

Not only does it change by the day but sometimes by the hour.

During 2011 Speedweek a storm came through and dumped enough rain to flood a good portion of the flats in the evening and by 7am the next morning we were running again (albeit not ideal).

As far as trailer ground clearance is concerned, I like to have at least 6" of clearance incase I hit a pothole.

  Don


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on February 10, 2015, 09:29:17 PM
It is real entertaining when the track conditions change along its length with soft and sticky spots among hard and dry ones.  It does not happen very often.


Title: Re: APS/Ω Gas turbine bike build
Post by: Stan Back on February 11, 2015, 06:10:30 PM
Bob --

Let it go.

The SCTA does not let "vehicles" ride/drive back.  I'd agree that most bikes could be ridden back without incident.  But a streamlined bike with limited vision would be a problem, right?

So just make the rule that no vehicles (cars and bikes) are to be driven back {or write another rule that "must have 45š(?) of frontal vision measured at the Cowl (see Rule Book for Cowl definition)" or something}.  (Boy, that was an exercise in punctuation -- did I get it right?)

Stan


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 12, 2015, 05:34:13 PM
I guess there are similar problems with both ice and salt tracks, if I were rich I would build a full length course in 50cm thick concrete and invite you all to race for free. :-)

I thought I had fixed the scuba compressor, but the next test produced only 120bar and a closer inspection showed that the high pressure piston is worn out. Dodge! :-(

Lucky for me I have lots of good friends who will help a guy in dire need, Rickard told me to come over and fill the tanks on his diving compressor so now I have two 15 liter tanks filled to 230bar, plenty of air for several starts! He will also fill a large Argon bottle I have before the race so there wonīt be a lack of starting air for sure.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201877.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201877.jpg.html)

When I got back home I made a pair of stainless end caps for the foot pegs, I also wrapped the pegs with rubber tape to get some extra grip for the boots.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201878.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201878.jpg.html)

After that I cleaned up the bike, tested the ignition and oil system and charged the battery for the upcoming start. I ran the oil system at full pressure with the drain plug removed to see if there was any oil leaking past the shaft seals but not a single drop came out so I am very pleased. During the first couple of bench tests of the engine it must have leaked a pint of oil for every test run...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201879.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201879.jpg.html)

Not much at all left to do now before the race, an intake shield that keeps ice thrown from the front wheel from entering the engine, some stickers and other minor stuff to do. The weather looks pretty promising right now with sub zero degrees every night at the race track for the next two weeks, this will hopefully be a very fun race weekend!

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on February 12, 2015, 08:43:15 PM
Nice Anders. :cheers:

Have a blast.

Is the ice good enough to skate on?.


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on February 12, 2015, 11:17:37 PM


Is the ice good enough to skate on?.

Maybe until his tires get on it :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 13, 2015, 01:16:58 AM
The ice is usually very flat, they use to drill holes in the ice to let the water up and freeze so the track is often flat as a mirror. Before the race that is, once the spiked tyres start tearing it apart it gets pretty rough at the first section of the track.


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on February 13, 2015, 01:22:56 AM
I was thinking maybe the pit crew could be on skates. :-D

Maybe you could use a Zamboni between runs?????. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on February 13, 2015, 09:17:23 PM
Zamboni? You have Hockey in SA?


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on February 14, 2015, 03:24:37 AM
We do but not like when I played.
Pro in the 70s. Our currency was stronger than the Dollar
so guess where a bunch of Canadians, Austrians, Swiss, Finns, Swedes and others
spent their off season keeping fit?.

I managed a rink in 1980 so I used to take the Zamboni out for a spin.
Lousy gear ratios though. :-D :-D :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 15, 2015, 11:53:10 AM
I just did the final test before the race, everything went well except for a blown oil pump fuse during the first startup. I am glad that I have the Hobbs switch since it shut the fuel pump down immediately.

http://youtu.be/x37ez8nCDCo (http://youtu.be/x37ez8nCDCo)

Not a drop of oil came out when I opened the engine drain plug, I will investigate where the smoke comes from later.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201880.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201880.jpg.html)

Happy happy! :)


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on February 15, 2015, 12:09:23 PM
Gee-zul-MAN!  How exciting.  I sure wish I was going to be there to see the ice racing in general and this bike in particular. :cheers: :cheers: :cheers: :cheers:

But I've gotta say it -- about testing the bike without a shield over the (spinning) rear tire.  With those studs - and the forces caused by the spinning of the wheel -- weren't you concerned that it's start the party by throwing one of the pointy things at you?  Or are they installed in some manner (that I can't understand) so they cannot come loose and puncture anything that's nearby?


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on February 15, 2015, 12:37:20 PM
Jon, the rear fender would need to be 1/4 thick to slow one of those bullets, so it probably wouldn't matter if it was in place or not. 
Cool test, I wouldn't worry too much about the smoke, my guess is a little residual oil from the last run slipped past the seal.  It appeared the smoke was short lived.  Great video... wish it had subtitles, my Swedish it way worse than your English
Have fun, be safe (as possible racing motorcycles on ice with spiked tires), and go fast


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 15, 2015, 04:59:04 PM
Jon: The spikes are in fact pointy M6 bolts that are pushed through the tyre from the inside with washers and nyloc nuts, in order to come loose the spike would have to tear the washer right through the tyre cord.

I know a guy with a 500 hp Hayabusa who yanked the throttle a bit with the bike on the stand and at a high gear a couple of years ago at the race, the tyre tore apart from the forces and made a mess of the whole bike. Very stupid thing to do and without a replacement tyre (and all the electronics that were placed under the passenger seat) he had to call it a day without doing a single run that weekend... :-(

Stainless1: Most of the smoke is from the oil jet lubrication in the gearbox that slips past the shat seal and into the exhaust pipe, I could reduce the oil flow to the gearbox but that would risk running a bearing dry so I think I have to live with some smoke. Will check in on it later after the race is over and I have more time for R&D.

Thanks, my goal is to go 200km/h which is trickier than it might sound since the spiked tyres cause lots of drag. :-)

Cheers!
/Anders



Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on February 16, 2015, 05:07:36 AM
This is pretty gross
but as I recall towing motorcycles was banned after a serious accident
this is Wink Eller, doing some repairs to himself after an accident
No free healthcare in the USA
G

https://www.youtube.com/watch?v=dnG5i4IUB8c


Title: Re: APS/Ω Gas turbine bike build
Post by: Gu11ett on February 16, 2015, 09:12:18 AM
The video of Wink stitching himself up is from knocking his shin against a bolt on his trailer. It had nothing to do with towing his bike.


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on February 16, 2015, 04:25:42 PM
The video of Wink stitching himself up is from knocking his shin against a bolt on his trailer. It had nothing to do with towing his bike.

Didn't say it was
It certainly shows Wink isn't afraid of needles
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 17, 2015, 09:35:24 AM
During the run I noticed that the two exhaust temp gauges behaved very different to each other, so last night I did some experimentation with different thermocouple arrangements, I made a test chamber from a steel tube that I heated with a propane torch to get the same environment for both temp probes.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201891.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201891.jpg.html)

As a reference I used a hand held unit with a Fluke thermocouple, I tested it against the analogue gauge with its original thermocouple, the analogue gauge with a Fluke thermocouple, and a digital gauge with both types of thermocouples.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201889.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201889.jpg.html)

* The reference/Fluke and the analogue/Fluke measured the same, but the analogue gauge was much slower in response.

* Compared to the reference the analogue gauge/original thermocouple was both slower and read aprox.100°C lower in temp.

* The reference/Fluke and digital/Fluke read the same up to 800°C give or take couple of degrees.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201890.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201890.jpg.html)

The last test was the heat image, I managed to take a pic of the thermocouples when the temp had settled close to 750°C. (had to let go of the cables to take the pic so the right one tilted upwards and got a little bit hotter than the left one, the upper thermocouple was probably a tad hotter than 750°C when I took the picture.)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201893.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201893.jpg.html)

Here is a temp chart blacksmiths use to judge the temp of the metal, the tip color seems to be somewhere between the 704°C and the 760°C mark in the chart so I think I can assume that the reading is pretty correct.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Heat%20chart.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/Heat%20chart.jpg.html)

So, what have I learned from this? I will remove the analogue gauge and its probe and couple a Fluke thermocouple to the digital display I used for measuring T2 earlier. Much faster response and an, as far as I can tell, accurate reading.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on February 17, 2015, 10:59:29 AM
What about placement of the probes?   Temp is "usually" cooler in the center of the flow as compared to the edges.


Title: Re: APS/Ω Gas turbine bike build
Post by: salt27 on February 17, 2015, 11:06:46 AM
Anders,
  I like analogue gauges because they seem to be easier to read on the salt. (on a motorcycle)

When I purchased our EGT setup I bought digital with fast reacting thermocouples.

You just made me glad I did. (and yes they are hard to see)

Thanks, Don


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on February 17, 2015, 11:14:05 AM
Anders;

The speed of response is usually determined by the thickness of the thermocouple wires making the junction. There is probably also some filtering in the instrument but the main contributor is the thermocouple response time. For very fast response, there are "fine wire" thermocouples but their disadvantage is that they don't last as long at high temperature due to the small diameter wires. A shielded thermocouple such as yours also adds to the response time.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: nanno on February 17, 2015, 01:45:36 PM
All the best for Speed Weekend, Anders!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 17, 2015, 06:02:05 PM
The thermocouple is fitted in the middle of the jet stream to avoid being in the boundary layer, donīt know if it is correct or not but there it is.  :-)

The Fluke probes are really fast even though they are shielded ones, they are a couple of mmīs thinner than the old and slower probes though.

Thanks nanno!

---------

To stop the oil leaking from the freepower shaft seal into the exhaust housing I fitted a needle valve and a pressure gauge to the gearbox oil line, now I can adjust the oil pressure over the oil jets and hopefully find a setting that gives plenty of cooling for the bearings without flooding the shaft tunnel as it probably did during the last test.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201894.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201894.jpg.html)

I also removed the analogue temp gauges and connected the digital gauge to the Fluke thermocouple, fitted an oil temp gauge and removed the rev counter since it had quit working for some reason. I canīt see it anyway when I run the bike and the LED diodes are probably causing a bit of turbulence where they sit just in front of the compressor wheel so I decided to run without it. With 10°C outside temp I reached 66.000rpm at 2.5 bar P2 so if I keep the max pressure a bit lower than that I should be safe.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201896.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201896.jpg.html)

I also fitted a rubber splash shield to keep any water or ice from being thrown from the front wheel into the air intake.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201895.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201895.jpg.html)

Before I called it a night I started fitting some decals to the rear fairing, Compucar is my fighter-jet car racing friend Ernies business and the other sticker speaks for itself... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201897.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201897.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on February 17, 2015, 08:03:32 PM
Anders, I can say without much fear of being wrong, that you've done a first on the Forum when you mentioned that you turned your engine to 66,000 rpm.  Then you added that it was done without maximum boost, and if you keep it low the engine will be safe.

Yep - I can say pretty well that none of us has ever even thought of having a engine that'll spin past 20,000 - much less over 60k. :-o :-o


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on February 17, 2015, 09:52:39 PM
Its not just the 66,000...............its the ENTIRE EFFORT :cheers:

Anders........mild suggestion..........more front fender..........even if its only ice.........


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on February 18, 2015, 09:38:47 AM
Anders, I can say without much fear of being wrong, that you've done a first on the Forum when you mentioned that you turned your engine to 66,000 rpm.  Then you added that it was done without maximum boost, and if you keep it low the engine will be safe.

Yep - I can say pretty well that none of us has ever even thought of having a engine that'll spin past 20,000 - much less over 60k. :-o :-o

SSS, Rick V and Glen might disagree  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on February 18, 2015, 10:56:25 AM
Okay, Mr. Smarty Pants.  I should have said "Very, very few of us have ever. . .".

There.  Is that better? :evil:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 18, 2015, 12:05:06 PM
Well, many of you have a turbocharger that revs over 100.000rpm. My engine is just a turbo with a kerosene burner instead of a piston engine, simple as that. :-)

Old Scrambler, what do you mean by more front fender? More cover on the sides or should it extend more forward?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 20, 2015, 10:58:01 AM
Today I got the final modifications done on the bike and have started packing for Speed Weekend, lots and lots of stuff! :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201902.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201902.jpg.html)

I fitted a green LED light to the dashboard that is connected to the fuel pump so it lights up when the fuel pump has power. That way I can clearly see if there is power to the pump during the start, if any of the Hobbs safety switches are deactivated due to loss of oil pressure or a too high boost pressue the pump wonīt get any power and without the LED it is very difficult to tell.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201899.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201899.jpg.html)

About then I remembered my old bike stand I bought for my Hayabusa, after making a steel rod that fits inside the rear wheel axle I could use it on the turbine bike as well!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201900.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201900.jpg.html)

Since the throttle potentiometer was very exposed for water thrown from the front wheel I made a shield for it in aluminum, I donīt want to box it in since that would only increase the risk of water damage.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201901.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201901.jpg.html)

I also made a set of transport lids for the air intake and exhaust pipes so I wonīt fill the engine with snow and dirt while hauling it on the trailer to Speed Weekend.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201898.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201898.jpg.html)

Tomorrow and on sunday we will try to get the twinturbo jet kick up and running, Olov has worked hard on it and it is 99% ready for a test run now. Keep your fingers crossed! :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: BasementBorn on February 20, 2015, 12:12:50 PM
Been an awesome build to watch! Best of luck this weekend and remember to get a bunch of videos and pics. I know lots of us want to see how it goes!


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on February 20, 2015, 12:56:07 PM
As the old saying goes Anders, "Be safe, have fun, go fast!".  :cheers: :cheers: :cheers:

Have a great weekend. You've earned it.

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 20, 2015, 01:30:41 PM
Thank you very much guys, as long as the track stays frozen I think I will get a couple of decent runs out of her. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on February 21, 2015, 03:53:13 AM
Good luck this weekend and most importantly, have fun
G


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on February 21, 2015, 04:37:01 AM
All of the above. :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on February 21, 2015, 10:35:16 AM
Be safe!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 23, 2015, 02:47:31 AM
Thanks!

Yesterday we got the other race vehicle sorted out, judging from the sound it will be a threat to my bike if Olov has the balls to run the 2000m course flat out. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Jetspark%20MK3/Twinturbo%20kick%202015%20liten.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Jetspark%20MK3/Twinturbo%20kick%202015%20liten.jpg.html)

One of the turbos started leaking oil so we had to disassemble it, luckily it was the oil tank vent that was blocked so with a better vent the oil leak disappeared. Sorry for the jibberish language. :-)

http://youtu.be/uxZDR6VjK0k

Cheers!
/Anders


Title: Re:
Post by: bbarn on February 23, 2015, 07:31:34 AM
That is insane Anders! You guys have way too much fun!!!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 23, 2015, 04:47:19 PM
If you think we are having fun now just wait until we hit our first 200km/h run at Speed Weekend! (whatever decade that will be...) :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on February 23, 2015, 07:15:43 PM
have fun, go fast and stop safe.

Franey


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 24, 2015, 02:55:52 AM
Thanks Franey!


Title: Re: APS/Ω Gas turbine bike build
Post by: Scottie J on February 27, 2015, 09:44:38 PM
Freaking intense!  I don't know much about turbine engines, but that thing is sick!    :-D   :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 28, 2015, 12:36:38 AM
http://youtu.be/f4wItHPAFEM

(http://rs231.pbsrc.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/2015-02-27%2014.50.56.jpg~320x480)

I will get back to you with a longer report, but I ran this one safe at only 2bar boost to get a feel of the track. Today I hope to get out early while the track is hard and try for a full power run. Very VERY satisfying that the bike runs so well after all hard work on it!


Title: Re: APS/Ω Gas turbine bike build
Post by: nanno on February 28, 2015, 03:20:31 AM
My gosh, you're really not fooling around, are you?

Well done!  :mrgreen:


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on February 28, 2015, 04:34:18 AM
Congrats, Anders!! That's just awesome!  :cheers: :cheers:

Now get yourself a helmet like Rossi  :evil:
https://www.youtube.com/watch?v=Prx8ppLIxQ0


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on February 28, 2015, 08:44:30 AM
(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/2015-02-28%2010.19.23.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/2015-02-28%2010.19.23.jpg.html)

New member of the 200-club! The front end was all over the place so I need to make new triple trees before next race. Now we are going to race the jet sled, shower and listen to a metal band at the post race party!!! :cheers:

Yesterdays run:

http://youtu.be/9aVO0-CCQSE

Today:

http://youtu.be/zjubv80VgEU

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: fordboy628 on February 28, 2015, 08:47:41 AM
http://youtu.be/f4wItHPAFEM

(http://rs231.pbsrc.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/2015-02-27%2014.50.56.jpg~320x480)

I will get back to you with a longer report, but I ran this one safe at only 2bar boost to get a feel of the track. Today I hope to get out early while the track is hard and try for a full power run. Very VERY satisfying that the bike runs so well after all hard work on it!

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/2015-02-28%2010.19.23.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/2015-02-28%2010.19.23.jpg.html)

New member of the 200-club! The front end was all over the place so I need to make new triple trees before next race. Now we are going to race the jet sled, shower and listen to a metal band at the post race party!!! :cheers:

Yesterdays run:

http://youtu.be/9aVO0-CCQSE

Today:

http://youtu.be/zjubv80VgEU

Cheers!

/Anders

Very impressive Anders!!

You be Jedi . . .

 :cheers: :cheers: :cheers:
Fordboy


Title: Re: APS/Ω Gas turbine bike build
Post by: PorkPie on February 28, 2015, 09:45:45 AM
Anders...was this the reason why you have to move for the second run to course 2?????


Great job :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on February 28, 2015, 10:44:14 AM
Anders, looking great, congrats on the runs. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Stan Back on February 28, 2015, 12:59:07 PM
Toppfart?  I think I'd shitt.


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on February 28, 2015, 02:04:57 PM
Great job :cheers: and people think the salt is slippery :-o


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on February 28, 2015, 02:09:57 PM
Wonderful News :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on February 28, 2015, 02:14:34 PM
Congratulations Anders. It must be exciting to have made such a successful run in your turbine- powered Viking ship!

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Fiatdude on February 28, 2015, 02:29:39 PM
Fantastic results for all your hard work -- I've been amazed at all your fabrication and machine work -- -- CONGRATUATIONS


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on February 28, 2015, 02:52:07 PM
Good for you !!

Congrats.


Title: Re: APS/Ω Gas turbine bike build
Post by: fredvance on February 28, 2015, 03:49:14 PM
CONGRATULATIONS ANDERS. All of your hard work and meticulus(sp)  planning paid off. An awesome accomplishment!! :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: maj on February 28, 2015, 04:17:58 PM
Congratulations Anders
Not many reach there target first time out  :cheers:

How did the jetkick and pulsejet go ?


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on February 28, 2015, 07:21:45 PM
Congratulations Anders
Nice one
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Scottie J on February 28, 2015, 09:00:38 PM
Congrats Anders!  Nice work!   :cheers:  :-)  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 01, 2015, 12:04:07 PM
Thank you very very much for your praise, I am extremely satisfied with the weekend and will probably need a week or two to process everything that has happened.

I will make a youtube movie with the bike runs and write up a summary later this coming week, there is also a documentary tv team coming from Germany two weeks from now so I need to clean up the bike and fit regular tyres before that.

Cheers from one tired Anders!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 01, 2015, 04:33:21 PM
I just got back home and took the first shower since Wednesday. Tired as hell and just as happy, top notch weekend!!!

Here is yesterdays run, notice the very nervous steering when the front wheel hit the ground after being airborne a couple of times.

http://youtu.be/NOKuBCzApGk

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on March 01, 2015, 08:36:37 PM
Anders, you deserve to be both tired and happy. What a great weekend! What a great accomplishment!  :cheers: :cheers: :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on March 01, 2015, 10:12:21 PM
     Anders, It looked like you clipped a course marker at the end. Any damage?


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on March 01, 2015, 10:41:57 PM
Wow.  Good job!


Title: Re:
Post by: Frank06 on March 01, 2015, 11:00:39 PM
Congratulations!  Could some of the instability in the front end be caused by the studding pattern?


Title: Re: APS/Ω Gas turbine bike build
Post by: nanno on March 02, 2015, 04:50:00 AM
Awesome, personal record in the second go, not a lot of folks come out that way! Now considering the frontal area of your bike and the drag caused by the studs and the ice (which is probably something you could elaborate a bit more on), the big question is - What kind of horsepower does it make? Is there a way to make a (reliable) guess/estimate?  :evil:

Cheers,
Greg


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on March 02, 2015, 06:12:37 AM
I just got back home and took the first shower since Wednesday. Tired as hell and just as happy, top notch weekend!!!

Here is yesterdays run, notice the very nervous steering when the front wheel hit the ground after being airborne a couple of times.

http://youtu.be/NOKuBCzApGk

Cheers!
/Anders

How stiff is your steering damper set?  How tight are you gripping the bars??


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on March 02, 2015, 09:18:19 AM
Anders............Nice Ride :-) :-) :-)

The spikes on the rear seem to keep you very stable. When you add power and the front light-weights, the front spikes may be too long and the bike is rolling on 'spires' rather than the tire. Shorter spikes or screw-heads may help.


Title: Re: APS/Ω Gas turbine bike build
Post by: Koncretekid on March 02, 2015, 11:11:02 AM
Speed wobbles that I have encountered have been when the front end gets lights and then comes back in contact with the ground albeit slightly out of perfect alignment.  The design of the front end (rake/trail) naturally causes it to realign itself but may in fact over correct due to the momentum of the parts, setting up an oscillating motion.  In videos of the early British bikes, you can actually see one fork leg moving independently from the other - - very bad!  Newer front ends like yours are much stiffer and help but the steering damper is there to prevent the oscillations from continuing.  From earlier photos of your front end, it looks like your steering damper is connected very close to the centerline of the headstock.  It might help to make an clamp that will allow you to attach the end further away from the center which will make it more effective.  This should not be a problem for the travel of the damper because you have probably reduced the steering lock-to-lock rotation to a minimum.


Title: Re: APS/Ω Gas turbine bike build
Post by: bbarn on March 02, 2015, 11:36:31 AM
Looks like there is also a crack/groove in the ice that upsets the stability a bit. I have never ridden at high speed (over 120) on a bike, so I am not offering advice from that perspective. I have however encountered many (MANY) ruts, roots, logs...that have caused me some handling issues. If you watch the video back there appears to be a groove that is giving him some issues each time he crosses it.

As for the dampeners, spike length or other characteristics imparted by their existence or lack there of I am learning by reading here.

Anyhow, nice job Anders. Looks like you and the bike are in good enough shape to try it again. Well done!!!!


Title: Re: APS/Ω Gas turbine bike build
Post by: SaltPeter on March 02, 2015, 07:23:01 PM
How good is that Anders ...... Proper Job  :cheers: :cheers: :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: charlie101 on March 02, 2015, 08:57:37 PM
Absolute amazing! Gratulerar till en framgångsrik men hårresande repa!


Title: Re: APS/Ω Gas turbine bike build
Post by: SabreTooth on March 03, 2015, 12:42:21 AM
Congratulations Anders! That looked like a weekend well spent.

I continue to be in awe at your build skills and this thread is the one I keep coming back to for motivation.


Jim


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 03, 2015, 01:09:01 AM
Hi guys! Iīll try to answer the questions asked the best I can, if I forget someone please let me know.

PorkPie: The second track had a shorter acceleration lenght (1000m instead of 1500m) but with only bikes and sleds allowed that track was in much better shape when no cars had made deep tracks all over it.

Buickguy3: I did clip the flag pole at the end of the track, it broke a small part of the windscreen and left a red smear over the side of the fairing. 10cm to the left and it would have hit me flat in the head... :-)

Frank06: I donīt know, the guy who built them told me that this studding pattern was much more stable than many others so I guess it doesenīt get any better than this with home made spiked tyres at 200+km/h.

nanno: I have no idea about the power in the bike, I do know that there were many production bikes that ran slower than me and that a standard sports bike usually ends up around 200km/h in average. The engine characteristics are completely different to a piston engine so it is hard to compare, but perhaps somewhere between 100-140hp? I had a high 300km/h gearing fitted so with a lower gearing I would have gotten a higher power turbine RPM and much more power.

RansomT: It is a cheap china damper set to max, it has a little play in it so I will need to fit a better one. I held it fairly loosely so the front end could jump around a bit, if I had cramped the handlebars down I would probably have worsened the speed wobble.

bbarn: I agree with you that the bumps in the ice was what set the wobbles off, perhaps the steering geometry is a bit off and compressing the forks after havign the front wheel in the air only makes it worse. A shitty steering damper fails to stabilize the wobble and there it goes...

Anyway, I am totally amazed by the support I am getting from you guys. Iīd recon that you have seen it all already and wouldnīt care much for a project like this but boy was I wrong. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: fredvance on March 03, 2015, 10:30:45 AM
Anders, you and your accomplishments are amazing. A lot of us kind of look at the stuff we see all the time as kind of ho hum. But a guy that hand builds his owm turbine motor and then puts it in a motorcycle and races on the ice, That is unique and really exciting.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on March 03, 2015, 10:53:49 AM
"Anyway, I am totally amazed by the support I am getting from you guys. Iīd recon that you have seen it all already and wouldnīt care much for a project like this but boy was I wrong."

Innovation, skill, and daring are always held in high regard, Anders.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 03, 2015, 04:39:16 PM
Speed wobbles that I have encountered have been when the front end gets lights and then comes back in contact with the ground albeit slightly out of perfect alignment.  The design of the front end (rake/trail) naturally causes it to realign itself but may in fact over correct due to the momentum of the parts, setting up an oscillating motion.  In videos of the early British bikes, you can actually see one fork leg moving independently from the other - - very bad!  Newer front ends like yours are much stiffer and help but the steering damper is there to prevent the oscillations from continuing.  From earlier photos of your front end, it looks like your steering damper is connected very close to the centerline of the headstock.  It might help to make an clamp that will allow you to attach the end further away from the center which will make it more effective.  This should not be a problem for the travel of the damper because you have probably reduced the steering lock-to-lock rotation to a minimum.

That sounds exactly like what I experienced. Very good pointer about the positioning of the steering damper, I will get a high quality one and fit it to the fork leg to get it further from the steering center.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 03, 2015, 04:42:38 PM
Congratulations Anders
Not many reach there target first time out  :cheers:

How did the jetkick and pulsejet go ?

Thanks!

The jetkick ran in the mid-120km/h, we estimated the afterburner size wrong so we were 200°C short of exhaust temp which made the engine lose lots of power. No damage at all to the engine so we just need to tighten the exhaust cone a bit and then we are ready for some 150+ runs.

The Pulsejet sled ran faster and faster all weekend, the last run peaked at 180km/h something so next year with a slightly larger engine they will definitively threaten my class record. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 03, 2015, 04:49:23 PM
Anders, you and your accomplishments are amazing. A lot of us kind of look at the stuff we see all the time as kind of ho hum. But a guy that hand builds his owm turbine motor and then puts it in a motorcycle and races on the ice, That is unique and really exciting.

I can agree that the concept is rather unique, I am glad that I have managed to prove that it has some potential as well.

After 6 years of jet kick racing we are held as some mad scientist guys who never make it to the finish line so it is very satisfying to actually have built something that runs fast.

"Anyway, I am totally amazed by the support I am getting from you guys. Iīd recon that you have seen it all already and wouldnīt care much for a project like this but boy was I wrong."

Innovation, skill, and daring are always held in high regard, Anders.

Regards, Neil  Tucson, AZ


That is true, thanks for the praise.

Regarding the Omega engine class, how come electric and gas turbine engines are in the same class? Is it simply so that when the rules were written there was no one who thought that bikes would be powered by anything else than IC engines and therefore bundled the rest of the engine types in the same class?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 04, 2015, 10:05:42 AM
No time to rest if I want the bike to be race ready this summer, I removed the engine from the frame today to do a complete check of the engine and drive train.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201903.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201903.jpg.html)

With the chain out of the way I could remove the secondary gearbox sprocket to check it for wear, I was quite nervous when I turned it over since I sort of expected to find grinded down teeth all blue from overheating...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201905.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201905.jpg.html)

What a pleasant surprise, not much wear at all! A slight polished surface but no wear to speak of. The magnetic plug has some fine metal dust on it but no rastafari haircut so it is as expected from new gears.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201907.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201907.jpg.html)

The pinion gear is a bit more polished but still no direct wear or signs of heat, the 2bar oil jet lubrication must be working. If any gear expert have an opinion I would like to hear it.

Time to pull the cover of the engine, the first thing I found was some wooden chips that must have gotten into the air box when we cut wood for the oil drum BBQ. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201906.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201906.jpg.html)

I didnīt have time to pull the rotor out of the shaft tunnel, but there is a clear leak behind the turbine wheel past the piston ring seal.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201904.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201904.jpg.html)

I am not sure why the leak only gets serious at high boost pressures, it has never leaked any oil during the stationary tests at low P2īs but after both Speed Weekend runs the entire rear of the bike was smeared in oil that must have been coming out past the engine cover O-ring seal around the compressor housing.

Perhaps the air pressure gets into the oil scavenge line and puts a back pressure in the oil sump so the oil gets forced out through the shaft seals? Could the scavenge pumps even be restricting the oil flow back to the oil tank at higher boost pressures? Plenty of food for thought.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 06, 2015, 05:00:08 PM
I disassembled the gearbox today and have taken a couple of more pictures of the gears for inspection.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201909.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201909.jpg.html)

The wear on the pinion is even and very shallow, it is difficult to take pictures of shiny surfaces but I canīt see that the teeths are worn more in any certain location.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201910.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201910.jpg.html)

The larger sprocket has also a very even wear pattern, the darker radius on the left on the teeths isnīt visibly worn more but only a difference in colour. You can see the original surface between the teeths where there are stains of rust, higher up the teeths are evenly worn all along their lengths.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201911.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201911.jpg.html)

For a novice such as I the wear looks pretty acceptable, but please comment if you have an opinion.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201908.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201908.jpg.html)

I figured out a better way to lock the freepower turbine centrum bolt in place, earlier there was a hole drilled through the bolt head but it was a pain in the arse to get all four holes to align so I grinded a slot in the bolt head instead.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201912.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201912.jpg.html)

Finally I have found a reason for the massive oil leakage during running, earlier this winter I ruptured the tank during a run thanks to an overly restrictive oil tank ventilation hose. I must have overlooked one crack because while pressure testing the tank I found a >10cm long crack in a weld on the side of the tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201913.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201913.jpg.html)

I had pretty much filled the tank with oil before the race, and when the oil was being forced rearwards during acceleration the oil must have sprayed out through the crack. I have never had a leak during static running and if the leak was internal as I believed up until now the engine should have smoked like mad, everything points towards an external leak and I think I just found it! :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Rex Schimmer on March 07, 2015, 03:26:09 PM
Anders,
Do you do anything with the fork and the steering dampener oil to compensate for the cold temperature? I would think that you would want to use something VERY thin when the temps are at -10-30 deg C!

Rex


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 07, 2015, 03:48:36 PM
Anders,
Do you do anything with the fork and the steering dampener oil to compensate for the cold temperature? I would think that you would want to use something VERY thin when the temps are at -10-30 deg C!

Rex

The temperature at the race was actually 2-3°C so no freezing temps this year, the last couple of winters have been very mild.

I blame the chinese steering damper for the handling problems during the runs, I will fit an Öhlins quality damper before next race and see if the handling improves.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 08, 2015, 02:25:29 PM
I shimmed the crown gear 0.2mm closer to the pinion gear and got an acceptable play, 0.1mm more and I started to feel a resistance while turning the shafts.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201914.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201914.jpg.html)

I have also assembled the gas producer since there was nothing wrong with it, I just cleaned the wooden chips out of the cover and sealed it with some liquid red silicone to avoid any small air leaks around the O-ring seal.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201917.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201917.jpg.html)

Finally I welded the oil tank crack, I have yet to test the tank with shop air but Iīll do that before I assemble everything again. I am not really in a hurry since the next race is 5 months from now, but as soon as I have the bike ready I can start working on the Rolls Royce Viper engine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201918.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201918.jpg.html)

Cheers!


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on March 08, 2015, 02:38:11 PM

I blame the chinese steering damper for the handling problems during the runs, I will fit an Öhlins quality damper before next race and see if the handling improves.

My friend be careful here.  While the cheap damper (or mounting angle) is probably the issue, a "good firm quality" damper can magnify the issue if the problem is in the frame alignment or setup.  A controllable wobble turns into an uncontrollable weave very quickly.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 08, 2015, 02:57:06 PM
My friend be careful here.  While the cheap damper (or mounting angle) is probably the issue, a "good firm quality" damper can magnify the issue if the problem is in the frame alignment or setup.  A controllable wobble turns into an uncontrollable weave very quickly.

A very valid point youīve made, I will keep it in mind and try to get some seat time before the race so I can increase the speed in increments while provoking the steering a bit to see how the bike reacts.

By the way guys and gals, have you checked the front page out today? 8-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Jag%20pa%20Landracing.com.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Jag%20pa%20Landracing.com.jpg.html)

I am very honored by this to say the least.


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on March 08, 2015, 06:06:03 PM
Nice article  1st thing I read this morning. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: bbarn on March 09, 2015, 10:41:50 AM
Anders - I know I am not the only person with this question on their mind. When do you think you will be coming to Bonneville with your bike so we can see it up close and in person?

I have thoroughly enjoyed watching your build and admire your skill and determination. I would love to see this bike come to Bonneville, I think you would be able to put on an impressive showing. From experience, you will meet the nicest people in the world that will share their advice and experience with you freely which I have found to be priceless.


Title: Re: APS/Ω Gas turbine bike build
Post by: lsrjunkie on March 09, 2015, 02:49:28 PM
I'm with Brandon here! You are super talented and I'd love too see your bike in person. Bonneville just happens to be a wee bit closer then Sweden.


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on March 09, 2015, 02:59:53 PM
Yeah, but --   Keep this in mind, folks, before asking Anders to come over for a visit.  He went racing a week or two ago and it was 40F -- and he warm plenty warm (from what I could see in the photos).  Now imagine him at the salt - - listening to Ron Christensen on the radio telling us (I heard him giving this very data a couple of years ago) that "It's about 3.30Pm right now.  The temperature is 103F and the humidity is 6%".

Unh, anybody got any ice water to give to Anders and the rest of the Swedes? :-D :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 09, 2015, 03:04:19 PM
Thatīs right Jon, Iīll probably pass out three steps from the trailer at those temps..... :-D

Regarding the Bonneville trip. I have thought about it myself and I am not sure, going to Bonneville is a huge project both in time and money for me so before I go I need to know that I have a fair chance at the record. It wouldnīt feel very exciting to go through all the trouble of shipping the bike and accessories to USA knowing that I canīt get nowhere near the class record of 219mph.

This engine has its limitations because of the modest mass flow, if I use every trick up my sleeve I might get close to 200hp out of it but thatīs it. If I can get enough speed out of the bike with that amount of power then Iīll go as soon as the bike is ready and tested, if not then I will have to think it through.

I do have a plan for this in case the bike ends up short of 219mph that I have kept to myself and a few others, I am about to start drawing up a new gas producer engine for the bike which will have a mass flow similar to the Y2K bike with its Allison 250C18 helicopter engine. I will use the same turbine shaft but a much larger billet compressor wheel to get as much air through the engine as possible, it will also bring the boost pressure up towards 4 bar so it will be a serious engine for sure when it is finished. :-)

I have the compressor and turbine in my bookshelf right now, my friend John Wallis who has helped me calculate the engine I am running right now will do the critical calcs for this engine as well and hopefully I can start making the patterns for casting the compressor section late this year.

Since the engine build will take a couple of years I will keep racing and tuning the bike with the old engine in it, so by the time the new gas producer is ready to be installed I will hopefully have the chassis and fairings sorted out properly.

But pschhhhhh, keep it to yourself for now. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on March 09, 2015, 03:10:22 PM
Anders, whether you set a record or not, I think you would find that a trip to Bonneville would be worthwhile, just for the experience of being at such an historic & iconic event. Now go watch the movie "The World's Fastest Indian". If an old Kiwi could do it, so could you!  :-D


Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 09, 2015, 03:26:55 PM
That is true, but still it would feel a bit awkward if the bike isnīt up for the job. I could as well leave it at home then and just buy a flight ticket to visit the race as a spectator.

A couple of pics from Speed Weekend taken by a friend called Coolegan, a very good photographer indeed.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Turbinhojen%20natt.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Turbinhojen%20natt.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Hojkorning%20lordag%201.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Hojkorning%20lordag%201.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Hojkorning%20lordag%202.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Hojkorning%20lordag%202.jpg.html)

(No I wasnīt sleeping in the last pic, just checking where to place my feet...)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 19, 2015, 05:34:15 PM
Starting the engine with compressed air is easy but very impractical since I need to bring several scuba bottles with me to the race, so Iīve decided to build an electrical starter instead.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201919.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201919.jpg.html)

I found a suitable aluminum plate in the good-to-have-pile and started making a motor bracket.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201921.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201921.jpg.html)

Almost there...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201922.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201922.jpg.html)

I have some final touches left to do to improve air flow around the bracket arms but I had to test fit the starter motor first.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201925.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201925.jpg.html)

That looks like it could work, while writing this post the thought struck me that the motor might hit the front wall in the intake air box, I have to take some measurements next time I am in the workshop to see if I need to modify the air box somewhat... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201923.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201923.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on March 20, 2015, 10:19:14 PM
Anders, looking at the movie of the race, it seems a small reduction in triple clamp offset will help.  A 3mm reduction is noticeable in my experience and a 5mm one makes a big difference.  This increases the trail and consequently, the self centering capability of the bike steering.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 21, 2015, 04:06:12 PM
Anders, looking at the movie of the race, it seems a small reduction in triple clamp offset will help.  A 3mm reduction is noticeable in my experience and a 5mm one makes a big difference.  This increases the trail and consequently, the self centering capability of the bike steering.   

Thanks for the suggestion! The first thing I will try though is to fit a higher quality steering damper, I used a cheap China damper and after the race it has developed a 10mm free play when pushing the rod in and out... :-(

In reality I ran the bike at Speed Weekend without any steering damping at all, so I am not surprised that it behave the way it did at the bumpy track.


Title: Re: APS/Ω Gas turbine bike build
Post by: saltwheels262 on March 21, 2015, 07:48:17 PM
a 1 inch or 40 degree rake
 in the neck will always help.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 25, 2015, 03:41:06 PM
a 1 inch or 40 degree rake
 in the neck will always help.

Iīll keep that in mind in case the new steering damper wonīt help.

Over the last couple of days I have been working on the starter arrangement, and Iīve managed to build something that actually seems to work. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201926.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201926.jpg.html)

Don Giandomenico made something similar for his GR-7 turbojet, a solenoid controlled sleeve that fits the compressor nut.

https://youtu.be/_8GBwvzBzuk

I milled a sleeve from Robalon, a plastic material similar to nylon (but much harder) used to reduce friction in wood chips transporters at the central heating plant I work at.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201928.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201928.jpg.html)

I didnīt take many pics during construction since this is a test that might have to be modified later.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201932.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201932.jpg.html)

Here is a movie showing how it works, I ordered the motor controller, batteries etc today so when it arrives I can start assembling the bike again.

https://youtu.be/n_JyVK0agbA

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on March 25, 2015, 08:25:56 PM
  Anders,
    I know nothing about gas turbine engines, but It looks strikingly like a turbocharger. I would be concerned about the starter and the mounting plate and struts causing a severe disruption of the airflow pattern for the air entering the compressor. Could some sort of angle drive be used to minimize the mass in front of the turbine wheel? I will now turn the discussion back to those who understand.
    Doug  :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 26, 2015, 12:05:41 AM
  Anders,
    I know nothing about gas turbine engines, but It looks strikingly like a turbocharger. I would be concerned about the starter and the mounting plate and struts causing a severe disruption of the airflow pattern for the air entering the compressor. Could some sort of angle drive be used to minimize the mass in front of the turbine wheel? I will now turn the discussion back to those who understand.
    Doug  :cheers: :cheers: :cheers:

Hi Doug and thanks for the concern. :-)

The struts will be reshaped a bit on the belt sander to increase the aerodynamics, but these engines use to have a starter in front and it usually works without restricting the air flow overly much. I have a good set of running temp data now so once I start the engine I can check the temps for signs of disturbances in the mass flow, any problem usually shows up as an increased EGT.

Besides, with the bellmouthed intake the compressor sucks most of its air from the sides so a side hung starter would probably disturb the air inflow more than a front mounted.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 27, 2015, 10:46:04 AM
I spent an hour today improving the flow around the starter bracket, a new and smaller solenoid bracket and some grinding made it look a bit less restrictive. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201935.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201935.jpg.html)

I also countersunk the M4 screws so the sleeve wonīt hit the heads while retracted.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201936.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201936.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on March 31, 2015, 04:14:33 PM
It was about time to get rid of the unreliable optical tachometer and try to make something a bit more solid, Iīve bought a Borg Warner eddy current sensor and tonight I fitted it to the engine.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201938.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201938.jpg.html)

My partner in crime Olov is developing an Arduino dashboard/data logger that the tacho sensor will plug into, I will also monitor a handful of pressures and temps in the engine and log everything for later evaluation. My first plan was to buy the Road Rage system but it can only handle four sensors and the seller seems very uninterested in helping me out so we decided to build our own, Olov will use one on the twinturbo jet kick as well.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201942.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201942.jpg.html)

Here you can see the hole where the sensor tip sits, it reads 14 pulses each turn of the compressor wheel in this location.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201943.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201943.jpg.html)

Now I am more or less finished with the engine modifications for this time, as soon as the batteries and motor controller for the starter arrives I can fit them to the bike and start assembling everything for a starter test.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201944.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201944.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 10, 2015, 09:32:27 AM
I got the stuff I ordered from Hobbyking earlier this week.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201945.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201945.jpg.html)

Iīve made an aluminum box for the starter electronics and have started to fill it with parts.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201946.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201946.jpg.html)

You can see the Arduino cards and the motor controller fitted as well as a Neutrik Powercon bayonet plug that the battery pack will connect to the box with. My friend Olov has made an ECU for the starter so it will preheat and ramp the motor up to idling speeds automatically. Sweet! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201947.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201947.jpg.html)

For now I will keep the propane bottle and LiPo battery pack externally with quick fittings but later I will use a camping size propane bottle and fit everything to the bike. Then I wonīt have to drag any equipment with me for starting the bike. Double sweet! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201948.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201948.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 12, 2015, 03:20:19 PM
Olov came by today for some brainstorming about the starter electronics, a pan of coffee and a cake does wonders to creativity. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201949.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201949.jpg.html)

I had made up a mental list of stuff that needed to be taken care of during the Speed Weekend race, moving the oil filter so my knee wonīt hit it was one of the things.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201952.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201952.jpg.html)

To get rid of the external ignition box I fitted the ignition permanently to the bike, that way I can use the Neutrik contact for the battery charger so I wonīt have to remove the tail fender to charge up the bike battery between runs.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201953.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201953.jpg.html)

Here you can see the ignition in its new place, I used one of my spare Triumph coils instead of the bulky high-power coil I used before. Plenty of spark anyway so it wonīt have any trouble igniting the preheat propane.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201951.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201951.jpg.html)

Finally I drilled a hole in the air box and fitted a rubber "plutt" for the starter cables to come through, Iīve ordered a set of connections and a couple of meters of 8AWG silicone cable so when it arrives I can continue working on the starter system. Olov has some coding left to do as well but I am in no hurry at all. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201950.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201950.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on April 12, 2015, 09:52:33 PM
incredible

 :cheers: :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 30, 2015, 04:04:52 PM
Thanks sofadriver! :-)

I have started to assemble the bike again, I will show it at the Custom Bike Show in Sweden (large bike meet) in the Landracing.se monter so I need to get the bike together and see that it will run after being apart. Iīll use the impingment air starting for now since I wonīt have time to sort out the brushless starter in time.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201957.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201957.jpg.html)

There are some minor stuff I want to fix but it is mainly just a matter of putting everything back together, last night I made a new and longer oil line to get it out of the way for the left knee.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201958.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201958.jpg.html)

A couple of more evenings and the bike is ready to go, for instance I need to fit a better steering damper before riding the bike at speed again but I can still do a couple of engine starts at the show.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on April 30, 2015, 10:55:39 PM
Anders, it is a good idea to make sure the Triumph coil housing does not touch any oil lines or other parts that can wear a hole in it.  The case is soft aluminum and it is not wear resistant. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on April 30, 2015, 11:55:43 PM
Anders, it is a good idea to make sure the Triumph coil housing does not touch any oil lines or other parts that can wear a hole in it.  The case is soft aluminum and it is not wear resistant. 

A very good pointer, Iīll add some tape to the steel braided oil lines where they are close to the coil.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 05, 2015, 01:44:37 PM
The bike is ready for a final start before we take it to the Custom Bike Show the 6th of June.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201959.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201959.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on May 05, 2015, 03:06:25 PM
Maybe lay down a cool-blue blanket too simulate the ice...................


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on May 05, 2015, 07:51:32 PM
Good idea -- mimic the ice's color.  That's sorta what we did with the ZX12 "Icebreaker".


Title: Re: APS/Ω Gas turbine bike build
Post by: Buickguy3 on May 05, 2015, 09:04:01 PM
  Jon, You need to get a like button on here.
    Doug


Title: Re: APS/Ω Gas turbine bike build
Post by: Scottie J on May 06, 2015, 06:11:10 AM
Anders - Such fantastic work you have done to this bike!  Just when I think the bike is almost finished, you start adding more, cooler, gadgets.  I hope to see this bike in person some day, it's way beyond what I could ever put together.  Keep up the awesome work!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 06, 2015, 04:12:09 PM
Maybe lay down a cool-blue blanket too simulate the ice...................

Actually Glenn Ocklund (the general of Landracing.se) has talked about towing blocks of ice to the monter, I am a bit sceptical because of the season but for him problems are meant to overcome.

I hope you guys get to meet him some day, I canīt praise him (and of course his crew) enough for arranging the Speed Weekend on Ice every year despite the hardships theyīve had some years with warm weather, water level regulated lakes etc etc. Hats off! :cheers:

Anders - Such fantastic work you have done to this bike!  Just when I think the bike is almost finished, you start adding more, cooler, gadgets.  I hope to see this bike in person some day, it's way beyond what I could ever put together.  Keep up the awesome work!

Thank you Scottie! A bike like this is never really finished, I am right now planning to build a more powerful engine in parallel with racing the bike with the engine I have now.

If you set your mind to it I am sure you would pull something like this off, it is just a matter of long term planning and determination. If you for example set a goal to break a land speed record 15 years from now you just need to figure out what the yearly progress should be to reach your goal.

Today it is all about "pay today, race tomorrow", spend a fortune on catalogue tuning parts, spend even more on having someone putting the parts together and hopefully youīll be a champion 5 months from now. The joy of actually building the vehicle and learning something in the process is often lost.

Anyway, thanks! :)

On a side note my hobby project is slowly coming together, a Rolls Royce Viper jet engine that was missing some vital parts. I hope to have it running by the end of the summer. Should be fun. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Rolls%20Royce%20Viper%20301/Viper%2045.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Rolls%20Royce%20Viper%20301/Viper%2045.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 12, 2015, 03:04:49 PM
I ran the bike a couple of hours ago, everything went fine except that the relocated oil filter touched the fuel pump body and effectively grounding it causing the PWM controller to run the pump at full speed... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Test%20infor%20sommaren.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/Test%20infor%20sommaren.jpg.html)

Other than that it behaved as expected, the thread paste smoked a lot like it use to do before it has cured (burned away...) and the temps were a bit high as usually when the freepower is locked up.

https://youtu.be/SZGXkwiRi2w

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on May 12, 2015, 04:09:14 PM
HOLY CRAP

Glad you're ok, and the bike too. Wow!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 12, 2015, 04:14:01 PM
I wasnīt very worried, my nerves are pretty hardened after 13 years with this hobby... :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on May 12, 2015, 04:46:53 PM
It's a good thing that you were not sitting on the bike at the time!

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on May 12, 2015, 08:03:01 PM
Finally..........a new expression of a HOT SEAT :-D :-D :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on May 12, 2015, 10:47:24 PM

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Test%20infor%20sommaren.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/Test%20infor%20sommaren.jpg.html)

AWESOME PIC !!

(you're a sick man, Anders)
 :cheers: :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 16, 2015, 11:43:43 PM
If I were like most of the jet dragster guys I would fit flame throwers like this, flashing lights and loud sirens to make sure every single one was looking at the bike, for some strange reason a jet engine isn't considered interesting enough to gather a crowd.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 30, 2015, 02:02:19 PM
Not much action here in the thread but I have got a fair bit of work done anyway, last weekend I ran the largest half marathon in Europe in Gothemburg and finished 502 of around 50.000 runners at 1:24:50. After that I caught a cold that has lasted until now but that couldnīt stop me from updating the casting equipment with a vacuum chamber for lost wax casting and some other stuff. Here I have 3D printed a pair of test pieces in wax filament that I will try to cast tomorrow.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Gjuteri/Gjuteri%202.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Gjuteri/Gjuteri%202.jpg.html)

Another thing I will try is to degass the melted aluminum with nitrogen injection down into the bottom of the crucible.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Gjuteri/Gjuteri%201.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Gjuteri/Gjuteri%201.jpg.html)

I fitted the front fender to the turbine bike and wiped most of the oil and dirt from the fairings, hopefully it wonīt look to crappy next to the extremely polished harleys at the event... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201961.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201961.jpg.html)

I have also developed a hot dog holder for my kids, the Dodge hotdogs always tip over when they put them down on the plate so I made an experimental holder in the 3D printer. The test subject gave it one ketchup smeared thumb up! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Korvhallare.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Korvhallare.jpg.html)

I have also made the Triumph road worthy by putting a couple of layers of 2K clear coat on the rear fender, now I can finally try to get it registered with the stiff rear end so I wonīt have to look out for the police every time I ride it to town... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Bonneville%20bobber/Trajan%20klar.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Bonneville%20bobber/Trajan%20klar.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on May 30, 2015, 02:17:43 PM
Anders, you can do all the technical wizardry stuff you want but the simple hot dog holder is probably what can give you a lifetime income so you can play with all the fancy stuff you want to!!!  :-D :-D :-D :cheers: :cheers: :cheers:

Bye the way I also see some potential for your lost wax test pieces.  :-o :-o :-o

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on May 30, 2015, 02:53:18 PM
Anders, you can do all the technical wizardry stuff you want but the simple hot dog holder is probably what can give you a lifetime income so you can play with all the fancy stuff you want to!!!  :-D :-D :-D :cheers: :cheers: :cheers:

Bye the way I also see some potential for your lost wax test pieces.  :-o :-o :-o

Pete

That's the Wurst.  :-D

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on May 30, 2015, 04:15:46 PM
Awesome job on the half marathon Anders!  You are a man of many many talents  :cheers:

I love the hot-dog holder, I HATE that, and will carve one for my kids, great idea!  Your tester is uber cute.

Dean


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on May 30, 2015, 11:50:15 PM
Peter Jack: I have a couple more of those "why didnīt anyone think of this before" ideas but I am afraid pursuing the ideas until I start making a big profit on them would effectively consume all of the spare time I use to spend in the workshop. No idea having bucketloads of cash if I am too busy to use them. :-)

Sabat: Thanks! I actually took up running during the bike development to keep in shape until I would start to race it. I found that I have some sort of talent at it so I try to run at least 30km per week and do a handful of races every summer. A very effective way of clearing the head after a busy day.

Iīll make a new design with a bit smoother curves and try to cast it in aluminum, I could probably sell a couple of those to pay for my Argon refills. No patent application though. :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 08, 2015, 02:10:51 PM

Olov and I visited the largest custom bike event in Sweden last weekend, 10.000 visitors and decent weather so it was fun.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Norrtalje%202015%201.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Norrtalje%202015%201.jpg.html)

Our friends with the pulsjet sled was there as well, the pulsejet was heard over 20kmīs outside town and one of the glass windows fell out in the tall white building on the other side of the water... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Norrtalje%202015%206.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Norrtalje%202015%206.jpg.html)

I ran the bike twice but had problems starting it since the propane bottle was as good as empty, it idled a bit low in the video so when I braked the rear wheel the revs dropped below idling and I had to shut the engine down.

https://youtu.be/f0VMfT4cVs8

I have realized that I need to make a bleed valve for the interstage duct to get the idling temps down to reasonable levels, no fun at all with the temps around 750°C when staging in for a run. Iīll look into it once the race in September is over, and Iīll try to get the electric starter and tachometer working as well.

Cheers!


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on June 09, 2015, 12:25:58 AM
Anders, they have a class for that bike at Pendine Sands called "Turbine Wheel Powered."  The record is 140.81 mph for the standing start mile.  It is a nice event and a lot closer and less logistics than a trip to the US.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 09, 2015, 12:38:11 AM
Anders, they have a class for that bike at Pendine Sands called "Turbine Wheel Powered."  The record is 140.81 mph for the standing start mile.  It is a nice event and a lot closer and less logistics than a trip to the US.

That is awesome news!

Iīve heard about the Pendine Sands but didnīt think there would be a class for the bike, now it is settled that I will take the bike there. Not this year but perhaps the next one, Iīll bring the family and make it a combined racing/vacation trip! :)

Edit: Where can I find information about the event? At the Straightliners homepage there is some general info about the race but no class regulations as far as I can see, the BUB rulebook can be found in a link but it has no mention of turbine engines. The old Omega class (steam, electric, turbine) seems to be replaced with a solar/electric class so I am a bit concerned that turbine engines are becoming prohibited from the landracing events.


Title: Re: APS/Ω Gas turbine bike build
Post by: Malcolm UK on June 09, 2015, 04:41:19 AM
Anders & other turbine builders,

The UK Timing Association (Straightliners Events & SPEE3D Ltd) welcomes turbine wheeldriven bikes at events held on Elvington airfield and on Pendine Sands. The rules can be obtained from Straightliners HQ - when their personnel (Helen in particular) all return from the Isle of Man, where they are running two sprints. If its a safe bike with a turbine then it will run in Category V.

There is no distinction between a homemade gas turbine or a commercially available unit - the current records are held by the Mad Max team.

This year 2015 there record event at Elvington in May was just one week before the Pendine Sandsweekend, not sure we can get these dates in 2016 and avoid the TT build up, but you will be welcomed by all of the racers.

Malcolm

 


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on June 09, 2015, 10:54:45 AM
It would be interesting to see that pulse jet bike run there but it might attract attention from the MOD.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Malcolm UK on June 09, 2015, 12:17:43 PM
The beauty of the sands Neil is that the MOD have to be on 'days off' before they licence use of the bulk of the beach. So as they will not be there the organisers might consider a pulse jet entrant. Not sure how the Welsh community will react ........ :-o


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on June 09, 2015, 01:40:48 PM
I was referring to the incredibly loud exhaust noise, Malcolm.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Malcolm UK on June 09, 2015, 03:16:39 PM
Jet Reaction on afterburner was hosted at the last meeting on the sands and that was quite loud. I am sure the Mobacken Team might find something noisier to run - how about multiple entries Anders?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 09, 2015, 04:20:54 PM
Thank you Malcolm for clearing this out for me, I am looking forward to making a road trip to one of the landspeed events mentioned. Iīll send an email to Straightliners and ask for a set of rules and regulations for the class I will be running in.

In September there will be a one mile race on tarmac here in Sweden so after that I will have an idea how fast it can go. Is there any way of estimating the speeds that can be reached on the sands if you know what a vehicle is capable of on a paved surface, or will the dampness and texture of the sand on a particular race day make it impossible to predict?

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Malcolm UK on June 10, 2015, 05:38:30 AM
Anders

With only one event on the sands, attended by a few who race on tarmac/concrete, the speed differences may not be statistically significant.

Terry Smith on a his Hayabusa dropped from 204 to 176 mph (a loss of about 15%).

Zef with the turbine bike did take the two sand runs very easily as he has enormous torque. He dropped from a record 233 to 141 mph (not quite a 40% drop).

Tom with the monowheel always has issues of stability and dropped from 61 to 43 mph (about a 30% drop).


 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 11, 2015, 10:08:59 AM
140mph is only marginally faster than what I had as the entry speed in the measured kilometer at the ice track, I cannot imagine that the sand is any worse than spiked tyres regarding drag so it feels like I could have a chance at the record if everything falls into place. :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 12, 2015, 03:21:18 PM
It was about time to get the summer tyres on the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201962.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201962.jpg.html)

The wheels lost roughly 50% of their weight without the spikes in the tyres, I am very eager to find out how much faster it will be on a summer track! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201963.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201963.jpg.html)

Since I donīt have time to look at the P4 gauge I decided to remove the pitot tube in the insterstage duct, hopefully the loss of it will decrease the back pressure for the gas producer a little and lower the temps marginally.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201964.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201964.jpg.html)

I am very much looking forward to the One Mile race this summer, I hope for speeds of >300km/h.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 14, 2015, 04:01:49 PM
One of my major concerns with the bike fairings is how to properly fit the front fender, only using the holes in the glass fiber fender makes the whole thing rather rattly so I wouldnīt trust it to stay in place at >300km/h speeds. To solve this I cut a strip of 3mm steel today and make a supporting structure for the front end of the fender.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201967.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201967.jpg.html)

With the foam glued to it the fit is very snug and precise, the whole fender is much more stable now so I am more than pleased with myself at the moment. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201968.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201968.jpg.html)

My uncle Hasse dropped by today with a gift for the jet racing team, very kind of him but I canīt understand why he thinks I will need a fire blanket and a bag full of burn cooling gel... :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201969.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201969.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 26, 2015, 10:49:06 AM
With the arrival of some kind of summer I am quite busy building sheds and casting a concrete floor in the cold section of the workshop, luckily I havenīt got all that much stuff to do on the bike before One Mile in Färila in September.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201970.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201970.jpg.html)

One of the things I need to do is a tachometer for the gas producer, Olov has promised to help me out with the electrical stuff so this week I drew a display housing in Inventor and 3D-printed it in PLA plastic.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201971.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201971.jpg.html)

I also had to change the gearing a bit to allow for a higher top speed now that I run on regular street tyres without draggy spikes, some calculations gave a list of top speeds for different gearings at 30.000rpm power turbine speed. I like a bit of safety margin before the centrifugal force starts stretching the blade roots.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201972.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201972.jpg.html)

I fitted a 20 tooth sprocket which gives the bike a top speed of 320km/h, I donīt think Iīll reach it in a mile but it is easy do change sprockets at the race.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201973.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201973.jpg.html)

To get rid of the nasty steering wobble I changed the cheap Ebay steering damper to a genuine BMW S1000RR damper, since it hasnīt got the same shape as the China damper I had to make a custom bracket for it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201975.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201975.jpg.html)

Here Iīve just cut the bracket out for test fitting, later Iīll make it a bit more pleasing to the eye. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201976.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201976.jpg.html)

It turned out pretty well I think, I would prefer to have the steering damper travel a little bit longer but the fairings and air box was in the way so it ended up in this position.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201978.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201978.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: nanno on June 26, 2015, 03:11:08 PM
Cool stuff, did you notice, that literally one extra tooth on the front sprocket is 10mph topspeed?

Funny coincidence!  :-o


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 26, 2015, 03:57:36 PM
Didnīt think of that, quite a coincidence as you say!  :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: 4-barrel Mike on June 26, 2015, 04:44:45 PM
Need another Viper, conveniently close to Bonneville?

http://www.ebay.com/itm/191606574307 (http://www.ebay.com/itm/191606574307)

Mike


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 27, 2015, 01:09:38 PM
Need another Viper, conveniently close to Bonneville?

http://www.ebay.com/itm/191606574307 (http://www.ebay.com/itm/191606574307)

Mike

I think Iīll pass, the one I got is taking up half my workshop and I need the other half for the turbine bike. :)

Besides, I payed 1/3 of that for my 522. Quite a deal I must say, the guy selling it realized he would never get it anywhere near running so he practically gave it away to free up some space for a complete turn-key engine.


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on June 27, 2015, 10:26:31 PM
Is that steering damper from a 2012+ S1000rr?   The 2009-2011 dampers are kinda weak, non-adjustable.  I replaced mine with a 2012 and it was a difference between daylight and dark.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 28, 2015, 12:30:20 AM
Is that steering damper from a 2012+ S1000rr?   The 2009-2011 dampers are kinda weak, non-adjustable.  I replaced mine with a 2012 and it was a difference between daylight and dark.

This one must be newer since it has an adjustable knob at the end of the damper rod.


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on June 28, 2015, 10:50:27 AM
Is that steering damper from a 2012+ S1000rr?   The 2009-2011 dampers are kinda weak, non-adjustable.  I replaced mine with a 2012 and it was a difference between daylight and dark.

This one must be newer since it has an adjustable knob at the end of the damper rod.

Good, you will be happy then!   Just what you needed...


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 28, 2015, 03:44:53 PM
There is a slight noise from the steering damper just like there is some air trapped inside it when pushing the front end hard from side to side, is that normal?


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on June 28, 2015, 07:26:38 PM
There is a slight noise from the steering damper just like there is some air trapped inside it when pushing the front end hard from side to side, is that normal?

I don't remember that being case, however I can check it out when I get my BMW back.  I don't have my bike here right now, it's at the BMW shop for a fuel pump recall.  Should be ready next week.

A lot of road racers like replacing those stock pieces with high end ones, but the newer BMW pieces seem to work very well and are reliable.  I wouldn't suspect your damper being bad, not yet anyway.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 29, 2015, 02:30:29 AM
There is a slight noise from the steering damper just like there is some air trapped inside it when pushing the front end hard from side to side, is that normal?

I don't remember that being case, however I can check it out when I get my BMW back.  I don't have my bike here right now, it's at the BMW shop for a fuel pump recall.  Should be ready next week.

A lot of road racers like replacing those stock pieces with high end ones, but the newer BMW pieces seem to work very well and are reliable.  I wouldn't suspect your damper being bad, not yet anyway.

Thanks, it is probably not a big deal since the function seems ok despite the noice.

My previous china damper piston had a slack of several millimeters when changing direction so it was practically useless, this one is very tight and smooth so I hope that the steering instability after hitting a bump at speed is gone now.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on June 30, 2015, 04:12:46 PM
I weighed the bike yesterday, 186kg dry isnīt bad at all considering the heavy cast iron gearbox and the car battery. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Hojen%20ute%201.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/Hojen%20ute%201.jpg.html)

I also spent a lunch break grinding and polishing the steering damper mount a bit, now it looks more presentable.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201979.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201979.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on July 31, 2015, 01:18:08 PM
While waiting for the One Mile race in September I sent the rotary assembly for the upgraded engine I am about to build away for 3D-scanning.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%203.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%203.jpg.html)

This way I can get the wing profile directly in the CAD program and 3D-print a casting mold without having to find the radius by trial and error as I did with the engine I use now.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/3d2.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/3d2.jpg.html)

I got an email today with the scanning pics, the scans are done and post processing is under way.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/3d.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/3d.jpg.html)

Cheers!
/Anders :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 31, 2015, 12:22:32 PM
Adjusting the idle before the One Mile race in Färila, Sweden this weekend.

https://youtu.be/io0qcR0HATU


Title: Re: APS/Ω Gas turbine bike build
Post by: 4-barrel Mike on August 31, 2015, 01:13:38 PM
"Oh well, that's normal, too."   :cheers:

Mike


Title: Re: APS/Ω Gas turbine bike build
Post by: Peter Jack on August 31, 2015, 01:19:18 PM
I always enjoy your posts Anders. Your laid back attitude is a great example for others (me???).  :cheers: :cheers: :cheers:

Pete


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on August 31, 2015, 01:30:20 PM
Good luck Anders, looking forward to your report after the event.  :cheers:  Dean


Title: Re: APS/Ω Gas turbine bike build
Post by: Stan Back on August 31, 2015, 01:56:32 PM
I'd worry about getting "hot roasted nuts" without the ice spray coming back.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on August 31, 2015, 02:10:31 PM
4-barrel Mike: "Normal" is everything that doesenīt cause an immediate and total engine failure. :-)

Peter Jack: Thank you, I might sound relaxed but my heart is often pounding like a rabbits during hunting season when I test my engines... :-D

sabat: Thank you! Iīll make sure to get lots of video footage and Iīll stay off the saturday beer so I remember what to write in the race report.

Stan Back: The seat gets rather hot but I think Iīll be fine. I have a heat shield that keeps most of the radiant heat from the exhaust away from me.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on August 31, 2015, 06:19:10 PM
Very impressive :cheers: Hope you go fast :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 01, 2015, 03:28:05 AM
Very impressive :cheers: Hope you go fast :-D

Thanks, I hope so too! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 06, 2015, 10:00:48 AM
One Mile is over, I ran three times in total and the best run was 275.3km/h! :-)

Here is the video from yesterday, I havenīt had time to cut the video from today but Iīll post it as soon as it is finished along with a race report. Great fun despite the rain that ended yesterdays race! :-)

https://youtu.be/xu3TGETsufw

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: salt27 on September 06, 2015, 10:37:10 AM
My calculations put that at over 170 mph, WOW!
Well done Anders.   :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 06, 2015, 10:49:55 AM
Thanks! Not bad given the home brew fairings and "only" 150-160hp.  :-)

Here is todays run:

https://youtu.be/muTM7XjJjTQ

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on September 06, 2015, 11:04:34 AM
Good job Anders. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 06, 2015, 01:25:36 PM
Thank you so much Glen!

It feels great to put the DIY turbine community on the map, a couple of years ago we were considered a bunch of goofballs who laughed all the time, made terrible noise in the pits and barely made it off the starting line. Now we are starting to be considered as pretty darn fast goofballs. *LOL*

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/One%20Mile%202015%201.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/One%20Mile%202015%201.jpg.html)

Here are the official results from the weekend, todays run was a test run only so it didnīt register. Not bad at all to beat the Porsche turbo and GSXR1000 with a home built bike! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/Resultat%20One%20Mile%202015.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/Resultat%20One%20Mile%202015.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on September 07, 2015, 12:48:28 AM
Wow, that is a real good meet.  What is that thing on the lower right on the screen with the crosshairs and the red dot?


Title: Re: APS/Ω Gas turbine bike build
Post by: RansomT on September 07, 2015, 09:34:56 AM
Wow, that is a real good meet.  What is that thing on the lower right on the screen with the crosshairs and the red dot?

I believe that's G Force.  Contour HD GPS camera?


Title: Re: APS/Ω Gas turbine bike build
Post by: donpearsall on September 07, 2015, 11:40:49 AM
Congratulations Anders! What an amazing achievement to go so fast on a home-built turbine!
I love the sound of that engine as it goes by. Sounds like a jet plane.

Great videos too.

Don


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 07, 2015, 03:41:30 PM
Exactly, it is a G force meter. I have a 5Hz GPS logger with me during the runs that one of my computer skilled friends analyze after every run, a very useful tool when making changes to the gearing, boost pressure and such.

Thank you very much Don, it sure sounds nice when viewed from a distance. I was glad that the safety crew allowed my friends to stand there and video tape the run, Iīve never been further away from the running bike than a meter or so Iīve never heard it that way. :-)

Iīve just started to disassemble the engine to check for damage, no signs of heat damage at all to the gas producer which is great. A few of the stator vanes in the power turbine section has cracked their welds so that needs to be fixed though. Iīll dig further into it and take some pics later.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 08, 2015, 02:47:40 PM
I continued disassembling the engine tonight hoping to find any clue why the engine has been running so hot lately. Even if the 1000°C interstage temps were a local hot spot it still feels like something has happened.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201980.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201980.jpg.html)

The turbine wheel looks very nice, sharp wing tips so no signs of overheating! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201981.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201981.jpg.html)

The power turbine NGV looked a bit worse for wear, as I wrote yesterday five of the vane welds are cracked and one of the vanes was dangerously close to the C20 turbine wheel...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201982.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201982.jpg.html)

Some minor damage to the compressor inducer wings tells me that something has been sucked into the engine since the last time I took it apart, lets find out if there is more FOD deeper inside the engine shall we?

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201985.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201985.jpg.html)

I didnīt have to dig far to find more damage, three of the diffusor wedges had their leading edges damaged like the one in the picture. This would surely upset the air flow and in the end cause some rise in exhaust temperature. How much I donīt know but most likely measurable.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201987.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201987.jpg.html)

The last picture for the day is the turbine wheel, oil leaking past the turbine shaft seal has stuck to the rear of the wheel and the shaft has some bluening from the lack of post run cooling. If I run the oil pump after a run a small leak from the freepower shaft cause a fire in the exhaust so I canīt cool it that way for any longer periods.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tallguy on September 08, 2015, 05:52:32 PM
Anders, what material is the power turbine (with the cracked welds) made of?

I think better welding (design and execution) would help extend the service life.

Thanks for sharing all the info and pictures.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 09, 2015, 01:05:47 AM
Anders, what material is the power turbine (with the cracked welds) made of?

I think better welding (design and execution) would help extend the service life.

Thanks for sharing all the info and pictures.

The vanes are made from regular 304 stainless. I totally agree that the welding could have been better, there is very little room for the tig torch but Iīll try to weld the whole lenght of the vanes before I assemble the engine again.

You are welcome!  :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: WhizzbangK.C. on September 09, 2015, 08:04:48 AM
That looks to be a prime candidate for welding in a purge chamber. I've seen them made from sand blaster cabinets, or even from heavy gauge plastic inflated with argon. A little web searching will show a lot of options. Main benefits are you can really stick your electrode out to reach deep into a spot, and you are automatically back-purged all the time. Great for stainless, titanium, etc.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 09, 2015, 08:17:18 AM
Good idea, I will really need to extend the electrode if I want to reach all the way in between the vanes.


Title: Re: APS/Ω Gas turbine bike build
Post by: Jack Gifford on September 12, 2015, 11:45:11 PM
I don't understand the "APS/[greek letter omega?]" in the thread title. :?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 13, 2015, 02:44:53 AM
"APS" stands for Motorcycle class Special Constructions, and the Omega sign is the engine class electric/steam/turbine.


Title: Re: APS/Ω Gas turbine bike build
Post by: Stainless1 on September 13, 2015, 10:24:30 AM
It's all in the rule book Jack... you just have to venture through the other hundred pages...
 :-o  :-D   :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: grumm441 on September 13, 2015, 04:53:53 PM
The PS in APS is for "partial streamlining"
G


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 14, 2015, 03:57:54 PM
Yesterday night I spent in the workshop modifying the bearings to get rid of the rotor drag, made good progress but the upcoming test will show if anything has actually improved. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201988.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201988.jpg.html)

I made a groove around the journal bearing seats so the oil pressure acts on the whole bearing instead of just the top like before.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201989.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201989.jpg.html)

I also drilled a set of holes in the rear thrust washer to let oil in from the front journal bearing to the space between the washer and the thrust bearing, I shamelessly stole this idea from John who have experienced the same rotor drag as I.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201990.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201990.jpg.html)

Here you can see some old wear marks in the washer from the thrust bearing, hopefully the new oil film will keep the two separated from now on.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201991.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201991.jpg.html)

I did the usual propane flame test to see if any of the injectors were blocked, as you can see the one at 8 oīclock was partially clogged which might have messed with the combustion and increased the interstage temp reading.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201992.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201992.jpg.html)

I just had to remove it and silver solder a new 0.7mm syringe injector in place, easy as ABC since Iīve done it a few times now...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201993.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201993.jpg.html)

Close to midnight I had started to assemble the engine again before it was time to hit the bed, I removed the FOD damage marks on the diffusor wedges before assembling the compressor diffusor section.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201994.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201994.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 18, 2015, 04:14:42 PM
Today I put the engine together to try the bearing modifications out, I did everything properly just in case the rotor stricture issue would be solved.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201996.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201996.jpg.html)

The test showed that the rotor still stiffens up when oil pressure is applied, the modifications were probably still useful in their own way but didnīt solve the stricture. I have an idea what might be the problem though, Iīll thing about it a bit and get back to you.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201997.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201997.jpg.html)

After that I straightened the broken freepower vanes and welded them in place, I added a bit more weld to the other vanes as well so they wonīt crack again.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%201999.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%201999.jpg.html)

While welding the vanes I found these marks from the power turbine wheel rubbing the housing, it is most likely an old damage from the first test ride when the turbine shaft front bearing cage melted due to lack of cooling.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202000.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202000.jpg.html)

With the housing left to cool down I cut the seat apart and modified it to fit 10cm further back, this way I will get more room for my head behind the wind screen.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202001.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202001.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 20, 2015, 04:25:42 PM
FINALLY!!!

I managed to solve the darn rotor stricture tonight! I grasped the last hay straw as we say here in Sweden and decided to secure the rear thrust washer that up until now has been loosely fitted in a recess.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202002.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202002.jpg.html)

My guess was that the oil pressure applied on the journal bearing just behind the thrust washer would push it forward up against the axial bearing just like a hydraulic brake. I fitted four M4 screws to hold the washer in place.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202003.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202003.jpg.html)
 
Here they are fitted, I assembled the engine and tested it with 5 kg oil pressure and the rotor spun almost as freely as without any oil pressure at all! Hooray! :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202004.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202004.jpg.html)

I am very glad to finally have solved this issue, now I wonīt have to make the same mistake on the upcoming JU-02 engine.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on September 20, 2015, 06:35:33 PM
Anders, you always amaze me with just happening to have the perfect solution AND ALL OF THE REQUIRED FASTENERS at your ready :-) :-) :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Glen on September 20, 2015, 06:36:42 PM
Good job and save. :cheers: :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 20, 2015, 11:02:03 PM
Anders, you always amaze me with just happening to have the perfect solution AND ALL OF THE REQUIRED FASTENERS at your ready :-) :-) :-)

Yeah, it was real lucky that I had a set of "special gas turbine proof M4 thrust washer fastener" screws in storage.

Or, were they just cheap 8.8 supermarket screws? Who can tell, they all look the same... :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 21, 2015, 03:08:02 PM
While making the final adjustments to the JU-01 engine and racing the bike I will build a new and more powerful JU-02 engine during the next couple of years, it will use the same exhaust turbine as the JU-01 but have a significantly larger compressor wheel to increase both boost pressure and mass flow.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%201.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%201.jpg.html)

My friend John Wallis is the guy behind the calculations for the JU-02 engine and has donated a set of rotary parts for the cause, it is sort of a combined effort where he is the brains and I am the muscles. *LOL*

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%202.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%202.jpg.html)

I will build the JU-02 as an updated big sister for the JU-01, most of the design is sound and the gremlins are sorted out so Iīll only change a few things that I think I can make improvements to. To start with I made a drawing in Inventor Fusion of the sand casting pattern for the compressor diffusor, and yesterday I started 3D printing it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%204.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%204.jpg.html)

Here is a series of pictures from the printing process, it took 18 hours to complete with 0.2mm layers and 20% infill.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%205.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%205.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%206.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%206.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%207.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%207.jpg.html)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%208.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%208.jpg.html)

The wedges has a 1° taper to make it easier to remove from the casting sand, after some sanding down I think it will be smooth enough to work.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%2010.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%2010.jpg.html)

I got the rotor assembly 3D scanned this summer and a couple of weeks ago I printed a copy of the compressor wheel just for fun. It lacks the protruding rear center so I could fit it to the diffusor to see how things line up.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%2011.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%2011.jpg.html)

As you could see in the pics during printing there are two alignment holes on the back of the pattern, the thrust bearing housing on the rear of the diffusor plate has to be printed as a separate piece since it needs to be removable during the sand casting process.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%2012.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%2012.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: sabat on September 21, 2015, 03:29:15 PM
It is a brave new world of hot rodding!  Anders your skills are very impressive  :cheers:  Dean


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on September 21, 2015, 10:24:20 PM
Anders, can you stick that digitizing wand down a spark plug hole to make an image of a cylinder so as to determine bore and stroke?


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 22, 2015, 02:30:59 AM
Thanks Dean! If this works it is a small revolution in DIY sand casting pattern making, Iīll soon find out. :-)

Wobblywalrus: That would be useful for the race techs, but nope. Couldnīt the displacement be measured quite accurately with kerosene?


Title: Re: APS/Ω Gas turbine bike build
Post by: RidgeRunner on September 22, 2015, 06:18:21 AM
Anders

     Back in another time oil was used with the valves made inoperative to remain closed.

                   Ed


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on September 22, 2015, 10:21:08 AM
Anders;

Wouldn't a "lost wax" casting process be more accurate than sand cast?

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 22, 2015, 12:13:49 PM
Anders;

Wouldn't a "lost wax" casting process be more accurate than sand cast?

Regards, Neil  Tucson, AZ

A sand cast part is more than accurate enough for this, and a lost wax casting with mold making, cost of wax etc would be both very expensive and time consuming.

Lost foam would probably work, but then I would have to make the pattern manually and in case the casting turns out flawed I would have to go through the whole pattern making over again. With the sand casting pattern made I can make hundreds of castings with a minimum of effort, so that is by far the best method for making a part like this.


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on September 22, 2015, 04:45:16 PM
That makes sense, Anders. Your project is amazing!

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 23, 2015, 04:46:08 AM
That makes sense, Anders. Your project is amazing!

Regards, Neil  Tucson, AZ

Thanks Neil! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on September 23, 2015, 08:47:13 AM
Anders;

Wouldn't a "lost wax" casting process be more accurate than sand cast?

Regards, Neil  Tucson, AZ

A sand cast part is more than accurate enough for this, and a lost wax casting with mold making, cost of wax etc would be both very expensive and time consuming.

Lost foam would probably work, but then I would have to make the pattern manually and in case the casting turns out flawed I would have to go through the whole pattern making over again. With the sand casting pattern made I can make hundreds of castings with a minimum of effort, so that is by far the best method for making a part like this.

I used to be involved in the lost wax casting thing in the late 80s. Made molds for a sculptor who did horse racing trophies in Bronze. Not a fun job!!!!. Once the wax is gone you're OK but the process getting there is for crazy people. I won't touch that stuff anymore. Stick with the sand Anders. :-D :-D :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on September 23, 2015, 07:43:25 PM
Anders, it is a good idea to make your male plug a bit oversize to compensated for casting shrinkage.  Also, it helps to make the plug large enough to produce a casting you can machine down to final size.  My guess is all surfaces would be machined except for the sides of the blades and the cavities between them.

Figure on making a few castings.  Usually it takes several tries to get a good one.

The surface on those rotors might be shot peened or bead blasted.  It is a good idea.  It makes the surface under compression and it reduces the chances of a fatigue failure.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 30, 2015, 04:36:49 PM
Thanks for the hints and tips guys, I appreciate them. Just for the record the cast part is a stationary part of the engine and wonīt rotate in any way, so the surface quality and balance is not critical.

This week I decided to make the water tank for the upcoming water injection system, a couple of evenings ago I made a styrofoam mockup to find the right size and shape for the tank. The idea is to make it double as a chest rest so I wonīt have to hang all of my mighty 67kgīs on my arms...

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202005.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202005.jpg.html)

With the shape decided I started making the tank tonight in 1mm aluminum.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202006.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202006.jpg.html)

Not the best looking welds exactly, it would probably have helped if I had bothered to clean the oxide and dust from the aluminum before welding... :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202007.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202007.jpg.html)

Oh well, it ended up leak free and that is all that matters. There is also a AN4 fitting welded to the bottom of the tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202009.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202009.jpg.html)

The result ended up the way I had pictured it, the water tank isnīt in the way for my helmet and with some padding on top I will have a nice rest for my arms while covering up behind the wind screen.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202010.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202010.jpg.html)

I ordered a water pump, pressure regulator and a high flow spray nozzle on Ebay last weekend so when I get it I can hook everything up and do some flow tests.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on September 30, 2015, 06:16:26 PM
Nice work :-).........Maybe the 'gas-cap' should say WATER ONLY :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on September 30, 2015, 11:09:25 PM
Well, things would turn interesting very quickly if the tank was accidentally filled with kerosene. Pushing the water injection button would instantly double the fuel flow into the engine.... *boom!*  :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 04, 2015, 07:26:38 AM
The exhaust pipes on the bike have been less than perfect, they aimed the exhaust jet straight out from the sides which probably caused lots of extra drag. Time to do something about it. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202011.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202011.jpg.html)

Iīve just started to make the new extensions, they are meant to angle the exhaust backwards and have an increasing cross section to increase the flow through them. Even the smallest decrease in back pressure for the freepower turbine adds horsepower.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202012.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202012.jpg.html)

After an hour and a half I had one side ready to be spot welded together, the exhausts stick out just as far as my leg so they wonīt cause any extra drag.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202013.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202013.jpg.html)

Here you can imagine just how much better the flow will be, now it can leave the power turbine in a much straighter line than before.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202015.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202015.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on October 04, 2015, 11:41:29 AM
Anders, your work is so awesome but you really have to do something about those numbers!  :-o  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 04, 2015, 12:00:59 PM
Anders, your work is so awesome but you really have to do something about those numbers!  :-o  :cheers:


You are right about that, I totally forgot about them at the race so I had to use vinyl tape to get them on there just before the race was on.

Iīll make them a bit prettier (and less prone to drop off...) this winter.  :-)


Title: Re:
Post by: Frank06 on October 05, 2015, 01:31:30 AM
Looks pretty warm for the feet!


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on October 05, 2015, 03:43:12 AM
Anders, your work is so awesome but you really have to do something about those numbers!  :-o  :cheers:



The bike is so fast it pulls the vinyl off!!!!! :-D :-D :-D


Title: Re:
Post by: Mobacken Racing on October 06, 2015, 06:57:59 AM
Looks pretty warm for the feet!

It is pretty ok actually, I have a stainless heat shield between the engine and feet that keeps most of the radiant heat away.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 06, 2015, 01:40:46 PM
Last night I made the second exhaust pipe and welded them together, the aluminum tape is my poor-man root gas. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202017.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202017.jpg.html)

I seem to have managed to make both pipes the same angle and length, way to go Anders! :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202018.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202018.jpg.html)

Then I turned my attention to the aerodynamics, I started making skirts for the rear fairing to enclose the rear wheel.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202020.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202020.jpg.html)

I am aware that I am stumbling in the dark here since I have no way of confirming that it actually works until I race the bike next summer.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202021.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202021.jpg.html)

Here is my high tech sheet bending machine. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202022.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202022.jpg.html)

One side almost finished, one to go. Enclosing the rear wheel will keep air from the spokes that act like a fan at the high speeds they will be spinning and hopefully lower the drag.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202023.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202023.jpg.html)

With the left side made I trimmed down the lower edge until it was 21cm from the ground all around, there are some gaps that needs to be closed and so on but that can be fixed later. It was only 5 hours left until I had to get up for work so I dropped the tools and headed for the bed. :)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202026.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202026.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: bbarn on October 06, 2015, 02:27:23 PM
Consider making the rear of your bike a little less blunt Anders. You will already have a large area of separation drag behind the rider. Adding a big flat rear fender will leave a large pocket of drag in that area, think of it as an anchor hanging off the back.

The illustration I use when describing separation drag is a rowboat vs a canoe. If you imagine a rowboat with a flat rear end and a canoe with a tapered rear then climb into each one. Now give each of them three equal strokes with an oar. Which one will coast farther?

This is because the rowboat has separation drag that is much more prevalent than what you would find on a canoe. There may be other considerations you have there in terms of length, portability, storage... but if not it is free advice use it how you see fit.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 06, 2015, 02:40:16 PM
Consider making the rear of your bike a little less blunt Anders. You will already have a large area of separation drag behind the rider. Adding a big flat rear fender will leave a large pocket of drag in that area, think of it as an anchor hanging off the back.

The illustration I use when describing separation drag is a rowboat vs a canoe. If you imagine a rowboat with a flat rear end and a canoe with a tapered rear then climb into each one. Now give each of them three equal strokes with an oar. Which one will coast farther?

This is because the rowboat has separation drag that is much more prevalent than what you would find on a canoe. There may be other considerations you have there in terms of length, portability, storage... but if not it is free advice use it how you see fit.

Hi bbarn!

Thanks for your reply, I am glad that you post ideas and suggestions open for discussion here. As you might have guessed I have very little experience with aerodynamics so I appreciate it.

My idea was to make a Kamm-style tail to keep the overall length as short as possible, and judging from bike fairing pictures Iīve found on the internet the result looks pretty similar to a "real" Kamm tail.

/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: bbarn on October 06, 2015, 02:47:47 PM
I figured you had some ideas there, you seem to think well ahead of the problems. Like I said, it is free advice so if you don't use it no issues, if you do use it...well, you get what you paid for!  :wink:


Title: Re: APS/Ω Gas turbine bike build
Post by: fredvance on October 06, 2015, 03:26:05 PM
Look at the rear of Joe Amo's grey bike, Larry Forstall's "Guppy", Ralph Hudson's bike and Bill Warners bike. I consider these bikes the best of the best. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Old Scrambler on October 06, 2015, 05:14:42 PM
Another BEST.......

http://wpmedia.driving.ca/2014/01/img_6079.jpg?quality=60&strip=all&w=800&h=520&crop=1

or look up: Tom Mellor Speed Junkie...............


Title: Re: APS/Ω Gas turbine bike build
Post by: MattGuzzetta on October 06, 2015, 07:12:14 PM
Anders, I love your bike and self made turbine! :cheers: Your build site is one of my "must check" nearly every day for the past few years. Actually running it and the speeds you have attained is just spectactular.
Your Kamm tail idea is interesting and should be an interesting experiment.  I have used the Kamm tail on 2 vehicles, one a Bonneville 500cc streamliner and the other a 125cc motocycle for the Vetter High Mileage contest some years ago....(about 35 years,  but who is counting?) I will attach some photos of the streamliner model and the car as run at Bonneville and some pics of the bike with and without a rider.  Your idea of having a tank for resting your chest on is something we did as well and it worked wonders for us on our long ride. Having your chest supported by the bike helps you with steering control as you only need your arms to steer the bike, not to hold your body up. 

This picture shows the top view of the streamliner model with the clipped tail.
(http://i5.photobucket.com/albums/y176/bubbamatt/Project-500-001.jpg) (http://s5.photobucket.com/user/bubbamatt/media/Project-500-001.jpg.html)

This picture is the car without the wheel covers and unpainted showing the fiberglass foam monocoque
construction.  We had to supply info to the SCTA throughout the construction to let them see how the
car was built as there was no tube chassis.
(http://i5.photobucket.com/albums/y176/bubbamatt/Project-500-13.jpg) (http://s5.photobucket.com/user/bubbamatt/media/Project-500-13.jpg.html)

This is a pic of the car running at Bonneville, we made 137 MPH with a Triumph 500cc flat track motor
that came out of Gene Romero's bike.  It had about 48 hp so the Kamm type tail didn't hold it back so much.
(http://i5.photobucket.com/albums/y176/bubbamatt/Bonne-Project-500-012.jpg) (http://s5.photobucket.com/user/bubbamatt/media/Bonne-Project-500-012.jpg.html)
 
This is the car in line showing the flat tail. I did have the tail open to use the vacuum at the
rear to help draw in air for cooling the motor.....at least that was the theory!
(http://i5.photobucket.com/albums/y176/bubbamatt/Bonne-Project-500-011.jpg) (http://s5.photobucket.com/user/bubbamatt/media/Bonne-Project-500-011.jpg.html)

This is the 125cc Suzuki with about 10 hp that we ran cross country.  This also has the Kamm type
tail with the opening for theoretically filling the turbulent air with air coming through the shell.
(http://i5.photobucket.com/albums/y176/bubbamatt/1280-ToElCentro.jpg) (http://s5.photobucket.com/user/bubbamatt/media/1280-ToElCentro.jpg.html)

A better pic of the back tail.
(http://i5.photobucket.com/albums/y176/bubbamatt/1280-Arizona.jpg) (http://s5.photobucket.com/user/bubbamatt/media/1280-Arizona.jpg.html)

This pic shows how the rider creates much drag as we were not able to get down as we wished. 
(http://i5.photobucket.com/albums/y176/bubbamatt/1983252Guzzettaspeed.jpg) (http://s5.photobucket.com/user/bubbamatt/media/1983252Guzzettaspeed.jpg.html)

The problem with bikes and riders is that the riders body is terrible for aerodynamics and it would be nice to spend a few days in a low speed wind tunnel to see what could be done to help that out.  I would like to see the difference of a Kamm tail compared to a tapered to a point tail as the turbulence from the rider might just screw up the best of streamlining  from the rider back, it would be fun to try!
Just keep the info coming, your experiment is very interesting to many of us out here! :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 07, 2015, 04:25:33 AM
I figured you had some ideas there, you seem to think well ahead of the problems. Like I said, it is free advice so if you don't use it no issues, if you do use it...well, you get what you paid for!  :wink:

:)

Look at the rear of Joe Amo's grey bike, Larry Forstall's "Guppy", Ralph Hudson's bike and Bill Warners bike. I consider these bikes the best of the best. :cheers:

Another BEST.......

http://wpmedia.driving.ca/2014/01/img_6079.jpg?quality=60&strip=all&w=800&h=520&crop=1

or look up: Tom Mellor Speed Junkie...............

Thanks! I Googled them and they were great looking bikes, lots of inspiration for a future set of aluminum fairings.

I could make some room for experimentation with the tail section with a hole cut in the rear plate and a removable extension that tapers towards a slim ending, then I can try both an open and a closed Kamm tail and a longer and slimmer tail to find out which design that has the lowest drag.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 07, 2015, 04:46:15 AM
Hi Matt,

Thank you very much for your praise! It feels like I am on the right track when I reached those speeds with "only" 150hp or so, and I think some further experimentation with the fairings will pay off.

Looking at the GPS log from the runs the speed increases fast up until 240km/h when the curve flattens out quickly and when I pass the one mile marker there is almost no speed increase at all, so the extra power from water injection combined with the (hopefully) lower air resistance should get the bike close to or even beyond 300km/h next summer.

Very nice pictures, Iīll save them in my aerodynamic folder for reference. The 125cc tail looks somewhat similar to the one Iīve built except that my tail isnīt as narrow because of the wide rear wheel.

I suffer from the same problem with getting the head behind the fairings, but I have figured out that if I cut a part of the wind screen away I should be able to bring the top of the helmet down considerably without losing too much line of sight. Iīll have my feancee to take a couple of pictures of the bike with me on it before and after modifying the windscreen to show the difference.

Iīll make sure to investigate this thoroughly and report about my findings here, if I want to get anywhere near the 349km/h class record I really need a set of slippery fairings. Plans are being made for building a new 300hp gas turbine engine for the bike so in 10 years or so I might actually have a bike that can compete with these darn fast electrical motorcycles... :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 07, 2015, 04:27:51 PM
As I might have mentioned before the helmet hits the wind screen when I try to get down behind it, so I just got back in from an hour in the workshop that I started by marking the section that needed to be trimmed down.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202029.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202029.jpg.html)

Here I have cut the section away, I had no one to take a picture but I can get the helmet much lower behind the wind screen now so probably a big gain in aero drag. Iīll ask my feancee to take some pics this weekend with me on the bike. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202030.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202030.jpg.html)

After that I made the last pair of brackets for the water injection tank.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202027.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202027.jpg.html)

It fits the frame like a glove and stays in place firmly with a pair of nylon zip ties, the height turned out just about right for resting the chest against it while sitting on the bike.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202028.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202028.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: manta22 on October 07, 2015, 04:36:58 PM
Anders;

That top photo scares me. If you suffer sudden hard deceleration, that windscreen is going to slice your face like a knife. Can you make the windscreen a little higher? The aero shouldn't suffer since otherwise your helmet is in the airstream and I'd bet it has more drag.

Regards, Neil  Tucson, AZ


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 07, 2015, 04:54:12 PM
Hi Neil,

The top photo shows the helmet position before I cut the windscreen, now I can get the helmet further down so the windscreen edge isnīt in line with the visor any more.


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on October 08, 2015, 09:50:16 PM
Anders, make another Aluminium tail piece and hold it in place with double sided tape.
Shape a new section with foam and cover that with glass.

You can do back to back testing with both tails. :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 09, 2015, 01:59:47 AM
Anders, make another Aluminium tail piece and hold it in place with double sided tape.
Shape a new section with foam and cover that with glass.

You can do back to back testing with both tails. :cheers:

I think I will do the extended tail as a learning project in sheet aluminum to get a chance to learn more about it.

I despise glass fiber, a material that cannot be welded cannot be trusted either.


Title: Re: APS/Ω Gas turbine bike build
Post by: bbarn on October 09, 2015, 08:14:14 AM
Anders, make another Aluminium tail piece and hold it in place with double sided tape.
Shape a new section with foam and cover that with glass.

You can do back to back testing with both tails. :cheers:

I think I will do the extended tail as a learning project in sheet aluminum to get a chance to learn more about it.

I despise glass fiber, a material that cannot be welded cannot be trusted either.

Do not fear glass Anders!!!! I too once lived in the dark ages with regard to glass. You can actually weld it with epoxy. It is a very forgiving material to work in. There isn't as much voodoo in it as I had ever heard.

You have the talent and knack to pick it up, I have seen your work. Once you learn how to work with it and become comfortable with it you will embrace its ease of use. Those hard to shape and time consuming pieces become a breeze with glass.

Trust me, I am a complete convert. The stuff is ridiculously strong and resilient too when a proper schedule is used. The new epoxy resins require little if any ventilation and have zero smell. You can layup parts in your living room if you wanted!

With the 3D printer you can make molds too....I promise, try it on something small and you will be disappointed you waited so long to use the stuff.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 10, 2015, 08:26:08 AM
Hi bbarn, I hear you about the glass fiber but since I am a metal working guy I think I will stick to sheet metal as far as possible. :)

I took the bike outside to take a couple of pictures to see how the riding profile would look like. I can also decide how to further improve the fairings, feel free to make suggestions if you have some bike aerodynamic experience.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202031.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202031.jpg.html)

This is much better than before, moving the seat and cutting off a segment of the wind screen helped me to get down further behind the fairings. I think moving the foot pegs down and back a couple of centimeters will make the riding position a little less cramped, Iīll look into it.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202033.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202033.jpg.html)

I will try to measure the frontal area somehow from the pictures, it cannot be overly much judging from the pics.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202034.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202034.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: fredvance on October 10, 2015, 01:18:39 PM
Anders, look at the front view. I think the air would stay attached from windshield to helmet. I see shoulders, hands, and legs, not good. I agree moving the foot pegs back and down would be good. The tail could be longer and lower. Open at the back is probably better. Just my opinion.


Title: Re: APS/Ω Gas turbine bike build
Post by: MattGuzzetta on October 10, 2015, 04:26:15 PM
Anders, you just keep on, love it!  A big part of making the aerodynamics work better for you is what rules do you have to follow?  Frontal area is important, but the flow of air over the bike is very important.  The normal motorcycle rules for fairing use seems to me to be about not having enough side area that can be affected by side winds. The side photo shows no streamlining on the bike on the main body.  If we can get you protected from the wind, you can probably go a lot faster with the motor you now have. It depends on how much air you need for the motor for intake and cooling.  If the air can be "managed" around all the bits and pieces that make up the bike, you can probably gain 40-50 KPH without adding more horsepower. 
Too bad we are so far away, this would be a fun project!  If there is anyway I can help you, just let me know. :-D  I know glass work is something you hate, and I also agree, but it is a fantastic way to make complex shapes quickly.  It can be a lot easier than you think, you just need some help and encouragement to make it happen!   I have a love hate relationship with composites, love what you can do with it and hate to have to work with it!
Let me know if you would like some long distance help and we can see what happens.  No fee needed, just like to help someone who is such a great enthusiast and craftsman.
Matt Guzzetta
Here are a couple of duct parts made with foam and fiberglass that shows you can make things
with this material and process that would be very difficult by other methods. The shroud covering
the motor is fiberglass over pattern wax that was molded on the motor, very efficient at cooling
the motor.
(http://i5.photobucket.com/albums/y176/bubbamatt/Shroud-Leftside.jpg) (http://s5.photobucket.com/user/bubbamatt/media/Shroud-Leftside.jpg.html)

(http://i5.photobucket.com/albums/y176/bubbamatt/Cooling-exhaust-valve.jpg) (http://s5.photobucket.com/user/bubbamatt/media/Cooling-exhaust-valve.jpg.html)


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on October 10, 2015, 06:59:36 PM
Anders, make another Aluminium tail piece and hold it in place with double sided tape.
Shape a new section with foam and cover that with glass.

You can do back to back testing with both tails. :cheers:

I think I will do the extended tail as a learning project in sheet aluminum to get a chance to learn more about it.

I despise glass fiber, a material that cannot be welded cannot be trusted either.

Do not fear glass Anders!!!! I too once lived in the dark ages with regard to glass. You can actually weld it with epoxy. It is a very forgiving material to work in. There isn't as much voodoo in it as I had ever heard.

You have the talent and knack to pick it up, I have seen your work. Once you learn how to work with it and become comfortable with it you will embrace its ease of use. Those hard to shape and time consuming pieces become a breeze with glass.

Trust me, I am a complete convert. The stuff is ridiculously strong and resilient too when a proper schedule is used. The new epoxy resins require little if any ventilation and have zero smell. You can layup parts in your living room if you wanted!

With the 3D printer you can make molds too....I promise, try it on something small and you will be disappointed you waited so long to use the stuff.

Anders, you already worked with fibreglass  on shaping your body work!!!!. I guess the itching got to you.
Goes with the territory.  :-D :-D :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: sofadriver on October 10, 2015, 08:41:44 PM
Anders, look at the front view. I think the air would stay attached from windshield to helmet. I see shoulders, hands, and legs, not good. I agree moving the foot pegs back and down would be good. The tail could be longer and lower. Open at the back is probably better. Just my opinion.

I agree with all.

Anders try this to measure your frontal area.  Put a piece of cardboard against the garage door. Put the tail of your bike against it pointing down the driveway.  Wait until dark then park your car 150' away and aimed at the bike.  Turn on the bright lights and cover one headlight.  Trace the bike's shadow on the cardboard.  Obviously you'll need a helper if you want to see the total area with rider.  Worked good for me! 


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on October 10, 2015, 09:09:21 PM
You're a very clever kid Mike. :-D


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 10, 2015, 09:55:14 PM
Anders, your feet might be as far back as they can go.  Don't forget about the exhaust pipe opening!


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 12, 2015, 04:33:38 AM
Anders, look at the front view. I think the air would stay attached from windshield to helmet. I see shoulders, hands, and legs, not good. I agree moving the foot pegs back and down would be good. The tail could be longer and lower. Open at the back is probably better. Just my opinion.

Hi Fred,

Could you explain what you mean with that the air would stay attached, I donīt understand the term.

The shoulders I cannot do much about without completely altering the fairings, the handlebars can possibly be shortened a bit and I still have the knee sliding pucks fitted to the leathers so removing them will hide the knees much better.

An experimental tail extension will be built so I can test all different tail configurations, I plan to buy a planishing hammer as a christmas gift for myself but keep quiet about it since I donīt want to spoil the surprise. :)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 12, 2015, 04:45:57 AM
Anders, you just keep on, love it!  A big part of making the aerodynamics work better for you is what rules do you have to follow?  Frontal area is important, but the flow of air over the bike is very important.  The normal motorcycle rules for fairing use seems to me to be about not having enough side area that can be affected by side winds. The side photo shows no streamlining on the bike on the main body.  If we can get you protected from the wind, you can probably go a lot faster with the motor you now have. It depends on how much air you need for the motor for intake and cooling.  If the air can be "managed" around all the bits and pieces that make up the bike, you can probably gain 40-50 KPH without adding more horsepower. 
Too bad we are so far away, this would be a fun project!  If there is anyway I can help you, just let me know. :-D  I know glass work is something you hate, and I also agree, but it is a fantastic way to make complex shapes quickly.  It can be a lot easier than you think, you just need some help and encouragement to make it happen!   I have a love hate relationship with composites, love what you can do with it and hate to have to work with it!
Let me know if you would like some long distance help and we can see what happens.  No fee needed, just like to help someone who is such a great enthusiast and craftsman.
Matt Guzzetta
Here are a couple of duct parts made with foam and fiberglass that shows you can make things
with this material and process that would be very difficult by other methods. The shroud covering
the motor is fiberglass over pattern wax that was molded on the motor, very efficient at cooling
the motor.
(http://i5.photobucket.com/albums/y176/bubbamatt/Shroud-Leftside.jpg) (http://s5.photobucket.com/user/bubbamatt/media/Shroud-Leftside.jpg.html)

(http://i5.photobucket.com/albums/y176/bubbamatt/Cooling-exhaust-valve.jpg) (http://s5.photobucket.com/user/bubbamatt/media/Cooling-exhaust-valve.jpg.html)

Hi Matt!

Making side panels for the front fairings is on my to-do list, I could quite easily make extensions from the existing fairings and fit a coulple of fixing points on the frame for them.

The engine consumes a little over 1 kubic meter of air per second, and the new engine I am designing will need twice that so a big consideration when building the fairings is how to get enough air into the engine intake.

I really like the glass fiber ducts you posted pictures of, a pair of those up front directing air past the dashboard wiring and into the air intake would be great. The mesh covered "head light" hole wonīt do much good since the air passing through it blows straight at the crow nest of wires behind the gauges.

Chatting about this is the best help I can get, I prefer to build things by myself but encouragement like this is much appreciated.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 12, 2015, 04:47:11 AM
I agree with all.

Anders try this to measure your frontal area.  Put a piece of cardboard against the garage door. Put the tail of your bike against it pointing down the driveway.  Wait until dark then park your car 150' away and aimed at the bike.  Turn on the bright lights and cover one headlight.  Trace the bike's shadow on the cardboard.  Obviously you'll need a helper if you want to see the total area with rider.  Worked good for me! 

That is a very clever idea! :-)


Title: Re: APS/Ω Gas turbine bike build
Post by: generatorshovel on October 12, 2015, 05:26:55 AM
Anders, look at the front view. I think the air would stay attached from windshield to helmet. I see shoulders, hands, and legs, not good. I agree moving the foot pegs back and down would be good. The tail could be longer and lower. Open at the back is probably better. Just my opinion.

Hi Fred,

Could you explain what you mean with that the air would stay attached, I donīt understand the term.
https://youtu.be/TqTSyFz6DJc
Fred is still asleep Anders, lol


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 12, 2015, 08:31:34 AM
https://youtu.be/TqTSyFz6DJc
Fred is still asleep Anders, lol

So it is a good thing then, that the air stays attached between windshield to helmet?


Title: Re: APS/Ω Gas turbine bike build
Post by: fredvance on October 12, 2015, 08:56:40 AM
Anders sorry it took me so long to get back to you. I am not sure about some of the termonology. My understanding of ATTACHED is that it is a good thing. in the case of your upper fairing and helmet I think the air would continue a smooth flow. If you were farther back or in such a position that the air would not have a continous flow it would seperate, not a good thing.


Title: Re: APS/Ω Gas turbine bike build
Post by: bbarn on October 12, 2015, 09:08:12 AM
https://youtu.be/TqTSyFz6DJc
Fred is still asleep Anders, lol

So it is a good thing then, that the air stays attached between windshield to helmet?

Yes. Keeping the air attached and as free from turbulence as possible = reduced aero drag. Obviously less drag means more power being applied to increase velocity and not wasting it just to overcome the drag you are creating.

The less you disturb the air the better. If you have to disturb it, try to control it so that it limits the amount of drag it generates. Keeping it "attached" means you are providing a path of least resistance for the air to move around/over/through a shape.

For visual purposes use the picture below. Laminar flow is what you want. You will never get it to look like that, but you want to strive to be as close as possible to it as you can. Let's assume that the flow over the front fairing is laminar. When it leaves that area what will happen to it? It looks like it should flow nicely right onto the helmet by jumping off the windscreen and "attaching" back onto your helmet staying relatively laminar.

If you look at the picture below, the further the "jump" the air has to make or the less controlled it is when leaving the surface it becomes more like the flow on the right side of the illustration. Your job as the chief aerodynamicist is to try and get as much of the air to move like the left side of the picture!

If you start thinking in terms of how to achieve the maximum laminar flow (keeping the air "attached") you will have one portion of your aerodynamic drag reduction completed.

(http://www.free-online-private-pilot-ground-school.com/images/boundary_layer.gif)

Separation drag is another area to consider. In my comment a while ago about not having a blunt fender I was referring to separation drag. This happens when you lose control of the air and it goes turbulent creating a vacuum. This effect can be used to advantage to make down force but that typically happens in a horizontal plane.

Making it in the vertical plane (Stubby/blunt endings) generate a vacuum that causes noting but pure drag. You want to avoid this too.

(http://www.daviddarling.info/images/air_flow.jpg)

All of this information is rudimentary and not given to you to change your mind or say I am an expert. Every aero problem is unique and solving one leads to another. I am NOT a bike guy. Driven them, raced them on dirt...not a high speed racer. There are things you can do on a bike that will help the aero but MAY make the bike unstable and unable to be ridden. Listen to the advice of the bike guys here.

More free info - Do with it what you like...no charge!


Title: Re: APS/Ω Gas turbine bike build
Post by: Seldom Seen Slim on October 12, 2015, 11:58:16 AM
If I were in the position you're in, Anders, I'd get in touch with Pork Pie.  He's an aero specialist (as well as a damned good photographer) and might be able to give you some tips and help.  He lives in Heilbron, Germany, by the way, so I have no clue what language you'll share :?

Best wishes and have fun with the bike.


Title: Re: APS/Ω Gas turbine bike build
Post by: stay`tee on October 12, 2015, 03:34:59 PM
Another method for finding Frontal Area. Complete with battle dress (leathers and helmet) sit in the tuck position on your bike,, have a friend using a dress makers tape measure around the extremities as viewed from the front,, this will give a "circumferance", do the maths,,,  :-)

 Anders, Enjoying your journey mate,  :cheers:


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 12, 2015, 11:01:57 PM
Anders, a couple of "lessons learned" are posted in my build diary.  They might help you.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 13, 2015, 04:29:51 AM
Anders sorry it took me so long to get back to you. I am not sure about some of the termonology. My understanding of ATTACHED is that it is a good thing. in the case of your upper fairing and helmet I think the air would continue a smooth flow. If you were farther back or in such a position that the air would not have a continous flow it would seperate, not a good thing.

No rush whatoever, I have all winter to clear this out. :)

That sounds reassuring, I have basic knowledge about aerodynamics but I havenīt yet caught up on all the english names involved. I would simplify things a lot if you guys start writing in Swedish instead.  :-D

Yes. Keeping the air attached and as free from turbulence as possible = reduced aero drag. Obviously less drag means more power being applied to increase velocity and not wasting it just to overcome the drag you are creating.

The less you disturb the air the better. If you have to disturb it, try to control it so that it limits the amount of drag it generates. Keeping it "attached" means you are providing a path of least resistance for the air to move around/over/through a shape.

For visual purposes use the picture below. Laminar flow is what you want. You will never get it to look like that, but you want to strive to be as close as possible to it as you can. Let's assume that the flow over the front fairing is laminar. When it leaves that area what will happen to it? It looks like it should flow nicely right onto the helmet by jumping off the windscreen and "attaching" back onto your helmet staying relatively laminar.

If you look at the picture below, the further the "jump" the air has to make or the less controlled it is when leaving the surface it becomes more like the flow on the right side of the illustration. Your job as the chief aerodynamicist is to try and get as much of the air to move like the left side of the picture!

If you start thinking in terms of how to achieve the maximum laminar flow (keeping the air "attached") you will have one portion of your aerodynamic drag reduction completed.

(http://www.free-online-private-pilot-ground-school.com/images/boundary_layer.gif)

Separation drag is another area to consider. In my comment a while ago about not having a blunt fender I was referring to separation drag. This happens when you lose control of the air and it goes turbulent creating a vacuum. This effect can be used to advantage to make down force but that typically happens in a horizontal plane.

Making it in the vertical plane (Stubby/blunt endings) generate a vacuum that causes noting but pure drag. You want to avoid this too.

(http://www.daviddarling.info/images/air_flow.jpg)

All of this information is rudimentary and not given to you to change your mind or say I am an expert. Every aero problem is unique and solving one leads to another. I am NOT a bike guy. Driven them, raced them on dirt...not a high speed racer. There are things you can do on a bike that will help the aero but MAY make the bike unstable and unable to be ridden. Listen to the advice of the bike guys here.

More free info - Do with it what you like...no charge!


Then I get it, as I wrote to fredvance I am slowly learning the English terms and now I know what attached flow means. Thanks a lot for the lengthy reply, I owe a lot to you guys here trying to get me on the right track with the aerodynamics!

One thing that I got aware of from looking at the pictures is that the helmet and leathers arenīt optimal with regard to air flow over the rider, the sharp edge at the back of the helmet might upset the flow and the lack of a motoGP "hump" at the back of the leathers most certainly cause flow separation.

I see that some tails are kept at more or less the same height all the way back to form sort of a wedge shape, what is the reason for this shape compared to the one I have where the height decreases in an imaginary curve pointing at the ground behind the bike?

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 13, 2015, 04:50:00 AM
If I were in the position you're in, Anders, I'd get in touch with Pork Pie.  He's an aero specialist (as well as a damned good photographer) and might be able to give you some tips and help.  He lives in Heilbron, Germany, by the way, so I have no clue what language you'll share :?

Best wishes and have fun with the bike.

That is a good advice, for now I think that sorting out the most fundamental errors here in the build thread will do wonders. When the time comes to rebuild the bike fairings completely Iīll send him a PM, but not until I have done some more high speed runs with the larger engine so I know how much extra space Iīll need for everything.

At the moment I am gathering parts and making the sand casting patterns for the compressor section so hopefully I will have the front end made by the end of this winter.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%2011.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%2011.jpg.html)

It will have twice the power of the engine I use now so 300hp or slightly more is the goal.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%2024.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%2024.jpg.html)

Here is the new engine case next to the bike, it is 30cm in diameter so I might need to modify both the chassis and fairings in order to fit everything.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2002/JU-02%2013.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2002/JU-02%2013.jpg.html)

It will take a couple of years to finish so the plan is to race the bike with the old engine in the meantime and try to figure out how to make the fairings as slippery as possible, if this engine is capable of 300km/h on the mile the bike will be a serious contender with twice the power! :lol:

Another method for finding Frontal Area. Complete with battle dress (leathers and helmet) sit in the tuck position on your bike,, have a friend using a dress makers tape measure around the extremities as viewed from the front,, this will give a "circumferance", do the maths,,,  :-)

 Anders, Enjoying your journey mate,  :cheers:

Another good idea for measuring the frontal area, it seems I have to bake a cake to trick a friend to drop by some day. :-)

Anders, a couple of "lessons learned" are posted in my build diary.  They might help you.

Very good lessons, Iīve learned them the hard way with a couple of earlier engine builds so I try to make everything as easy to work with as possible. I can remove the engine from the frame and take it apart completely in less than two hours if I need to, one of the earlier kick sled engines gave me a head ache just from thinking about taking it apart... :-)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: MattGuzzetta on October 13, 2015, 12:28:06 PM
Anders, one way to think about aerodynamics on a motorcycle is to forget about the motorcycle and realize that you are actually trying to streamline the rider, not the bike. The rider is usually the biggest part of the vehicle.  The reason (theoretically) that the tails of many bikes are almost level is that you need to clean up the turbulence coming off the back of the rider. By having the tail taper down you end up with nothing to clean up the air coming off the back of the rider.  You can see that by taking a photo of the bike from the side with the rider and see that the back of the rider is actually the end of the bike, aerodynamic wise. If you take a photo with a 200mm or longer lens, you can almost take dimensions off the photo.
Cheers to you,
Matt Guzzetta


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 13, 2015, 02:43:03 PM
Anders, one way to think about aerodynamics on a motorcycle is to forget about the motorcycle and realize that you are actually trying to streamline the rider, not the bike. The rider is usually the biggest part of the vehicle.  The reason (theoretically) that the tails of many bikes are almost level is that you need to clean up the turbulence coming off the back of the rider. By having the tail taper down you end up with nothing to clean up the air coming off the back of the rider.  You can see that by taking a photo of the bike from the side with the rider and see that the back of the rider is actually the end of the bike, aerodynamic wise. If you take a photo with a 200mm or longer lens, you can almost take dimensions off the photo.
Cheers to you,
Matt Guzzetta

That is a very good explanation Matt, now I get it.


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 13, 2015, 10:42:38 PM
Back when I was a teenager I had a Honda 305 Superhawk.  It is Honda's best bike.  The footpegs could be moved to the rear with simple adjustments.  I did this and then it was easy to get down low on the tank at high (for a Superhawk) speeds.  I was limber then and my chin almost rested on the speedo lens.  Unfashionable at the time, I had the standard seat.  It kept my butt high and my back level when I was tucked down.

The bike suffered from one of my early attempts at performance tuning and it was not as powerful as my friend's 305's.  It had equal top speed when I got tucked down.  My best guess is it was me having a level backside that made the difference.  It created a lot less turbulence and aero drag.   


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 16, 2015, 04:49:09 AM
A friend of mine at a jet forum managed to measure the frontal area from the picture I posted, he found it to be 0.42m2 which isnīt bad at all.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/dimensions_2.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/dimensions_2.jpg.html)

To decrease the frontal area noticably I would have to make drastic changes to the riding position, and that is impossible since the jet exhausts keep me from moving the pegs further to the rear.


Title: Re: APS/Ω Gas turbine bike build
Post by: fredvance on October 16, 2015, 09:23:00 AM
I wouldn't worry about the front. Look at Joe Amo's, looks like a hammerhead shark and it works!


Title: Re: APS/Ω Gas turbine bike build
Post by: Stan Back on October 16, 2015, 02:25:11 PM
Joe can really mow down the numbers!

(Especially the 4.)


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 16, 2015, 02:42:54 PM
To do things in your sleep is a measure of high skill, up until now all I could produce was snoring but with the addition of the 3D printer I suddenly have a much wider repertoire. :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202037.png) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202037.png.html)

Something that has bothered me from the beginning has been the sloppy placement of the quick fittings for propane and starting air, so last night I made a drawing of a fitting, loaded some Bridge Nylon in the printer and put it to work while I went to bed for a couple of pages of Joe Abercrombieīs The First Law fantasy triology before falling asleep.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202036.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202036.jpg.html)

This morning I woke up with the finished nylon fitting waiting for me on the printer table, and after dinner I went out to mount it on the bike. This 3D-printing business is so darn useful! :-)

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202038.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202038.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: tauruck on October 16, 2015, 03:57:59 PM
That's a great idea. When I first saw it I thought it was the updated hot dog holder!. :-D



Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 16, 2015, 09:47:04 PM
Anders, doubling the power is a big step.  Maybe enough to justify a perimeter or trellis frame and some way to direct the exhaust out the back. 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 17, 2015, 11:36:31 AM
That's a great idea. When I first saw it I thought it was the updated hot dog holder!. :-D

Not a bad guess. :-)

Anders, doubling the power is a big step.  Maybe enough to justify a perimeter or trellis frame and some way to direct the exhaust out the back. 

I have thought about making a completely new bike around the new engine, but I came to the conclusion that I want to see how fast this one can go first. Iīve spent way too much time and money on it just to scrap it after a couple of seasons of landracing.

Routing the exhaust up through the tail is difficult to say the least since the gearbox is in the way and the seat will become unbearably hot with the jet exhaust just beneath it.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 18, 2015, 03:43:42 PM
I found a use for the Neutrik bayonet plug that was used for the external ignition before I decided to fit it to the bike, I figure out I can use it for the battery charger so I wonīt have to remove the rear fairing every time I charge the battery.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202039.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202039.jpg.html)

Most of the stuff I ordered for the water injection has arrived so I made a spray nozzle holder to find out the flow rate and discharge angle, I need to know this before I decide where to fit the nozzle in the air box.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202040.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202040.jpg.html)

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Speed Limit 1000 on October 18, 2015, 09:14:54 PM
The G model B52 used water injection and it was impressive :cheers:
 


Title: Re: APS/Ω Gas turbine bike build
Post by: wobblywalrus on October 19, 2015, 08:58:46 PM
Aerodynamic symmetry is not as important if flow is detached and turbulent around the tail.  It becomes a bigger issue if the streamlining is developed to the degree that flow is attached to the tail.  Flow will attach to one side and be prevented from attaching to the other 'cause of the exhaust plume.  The pressure differential between attached flow on one side and detached on the other plus the sideways thrust of the exhaust might become an issue.  Splitting the flow so it goes out both sides might help. 

It takes a lot of time and thinking to figure out solutions.  It might be similar to the problem I had with the frame flexing due to the added wind loads and weight of the fairing.  Finally, after years mentally and physically wrestling with the problem, the solution was to add some strength to the fairing and its anchor points so it gives the chassis the needed rigidity.  Some fixes are not obvious.  it just takes time to figure them out.


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 21, 2015, 05:16:23 AM
At which speeds will side winds and assymetrical fairings start to become a problem with full fairing bikes? 300++km/h or can it happen at such low speeds as 200km/h if the conditions are severe enough?

The bike ran straight as a train at 275km/h but it might very well develop an instability once I get it past 300, no way of knowing before I have tried it I guess.


Title: Re: APS/Ω Gas turbine bike build
Post by: gidge348 on October 21, 2015, 07:18:47 AM
At which speeds will side winds and assymetrical fairings start to become a problem with full fairing bikes? 300++km/h or can it happen at such low speeds as 200km/h if the conditions are severe enough?

The bike ran straight as a train at 275km/h but it might very well develop an instability once I get it past 300, no way of knowing before I have tried it I guess.

Hi Anders, I don't think there is any easy way to tell what speed you may get a problem without a lot of calculations, but you will know if it happens. One manifestation would be setting up Karman Vortices.
https://en.wikipedia.org/wiki/K%C3%A1rm%C3%A1n_vortex_street
You probably would have felt these when you travel close behind a semi truck on the freeway.

Cheers
Ian...
 


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 23, 2015, 10:54:29 PM
Hi Ian,

Then Iīll stop worrying about the aerodynamics for now and focus on getting the water injection built and tested before next summer, I have made a few changes to the fairings and driving position so I am looking forward to run the bike and find out how fast it will go on the mile.

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 24, 2015, 12:58:54 PM
I ran the bike this afternoon to test the bearing modification, the rotor spins up much easier now and the engine runs smoother somehow. Earlier it had a grumph to it like it was struggling to keep the revs up but now it just whistles along at 700°C exhaust temp which is 100°C colder than before.

I still havenīt checked the thermocouple for faulty temp readings so it might run even colder than that, I could feel a significant drop in rear wheel torque at idle when I applied the rear brake which isnīt very strange since the exhaust temps were much higher before.

https://youtu.be/YcqlQdS-u_M

Cheers!
/Anders


Title: Re: APS/Ω Gas turbine bike build
Post by: Mobacken Racing on October 26, 2015, 05:20:59 PM
To help the air enter the engine I added a pair of radiuses to the air box entry tonight.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202041.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202041.jpg.html)

Hopefully they will reduce some of the supposed turbulence when the air passes the sharp corners and into the air box.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202043.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202043.jpg.html)

I also made a radiant heat shield for the thermocouple, you can see that slots are cut in the pipe so the exhaust can pass over the thermocouple for faster response.

(http://i231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt/Johansson%20Unit%2001/JU-01%202044.jpg) (http://s231.photobucket.com/user/Anders811017/media/Anders%20projekt/Johansson%20Unit%2001/JU-01%202044.jpg.html)

Iīve also figured out a way to lock the rear brake so I wonīt have to start the bike with the rear wheel in the air, a small washer can be fitted behind the brake grip to lock it in place. Iīve just made cad drawings o