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Author Topic: APS/Ω Gas turbine bike build  (Read 523280 times)
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sofadriver
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« Reply #1125 on: November 05, 2015, 08:52:54 PM »

Jeez, Anders, you're really working at the same level as Burt Munro and John Britten were.  Munro's tenacity and Britten's "outside the box" thinking.

 cheers
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Mike in Tacoma

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Mobacken Racing
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« Reply #1126 on: November 06, 2015, 02:41:30 PM »

This morning I got up early to start the electric kiln, then I drank three cups of coffee and are a bunch of sausage sandwiches while it was heating up. With the crucible at 700°C I started loading it with aluminum and an hour later it looked like this:



I added flux to the melt to make it pour better and degassed it with gasseous nitrogen to pull oxygen from the melted aluminum, then I removed the dross and let the crucible heat up to 780°C before I poured it.



Exciting to say the least! I have had my share of more or less faulty casting attempts so it would be nice I could see some progress.



The result was very good, I cut the sprues off and heat treated the part in 180°C for 6 hours so it will be easier to machine later.



The only flaw is a small bubble on the mating surface to the bearing tunnel, but I can easily weld it up with the TIG welder so no big deal.



The 0.2mm layers from the 3D printing is clearly visible, very good details with the petrobond sand in other words.



I celebrated the success with a 31km running trip to a nearby hydro power plant and back and spent the rest of the day with my family, a Friday cannot possibly be much better than this one. Smiley



Here is the video from the casting:



Cheers!
/Anders
« Last Edit: November 06, 2015, 03:22:54 PM by Mobacken Racing » Logged
Seldom Seen Slim
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« Reply #1127 on: November 06, 2015, 03:10:11 PM »

There's a post that should be archived, ladies and gentlemen.  We'll have the photo proof that he really did make his turbine engine from absolute frickin' scratch.  If they wonder if hot rodders can still be creative and inventive -- we have the proof.

Wonderful stuff, Anders.  Nice photo of yourself, too.   evil
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Jon E. Wennerberg
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Mobacken Racing
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« Reply #1128 on: November 06, 2015, 03:24:57 PM »

Jeez, Anders, you're really working at the same level as Burt Munro and John Britten were.  Munro's tenacity and Britten's "outside the box" thinking.

 cheers

Thanks! At least I am living proof that pure stubbornness can get you quite far. smiley

There's a post that should be archived, ladies and gentlemen.  We'll have the photo proof that he really did make his turbine engine from absolute frickin' scratch.  If they wonder if hot rodders can still be creative and inventive -- we have the proof.

Wonderful stuff, Anders.  Nice photo of yourself, too.   evil

This was actually very easy compared to when I made this part for the old engine, milling, milling and more milling...



Thanks a lot, we have some sort of exercise competition at work where we have to post pics from our training. It isn´t exactly passport quality.... grin
« Last Edit: November 06, 2015, 03:29:58 PM by Mobacken Racing » Logged
MattGuzzetta
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« Reply #1129 on: November 06, 2015, 03:35:33 PM »

Anders, you are amazing!  So that part does not rotate but is more of an air guide?  Nice castings, I wish you lived a bit closer to San Diego, we could have some fun for sure.  grin  Keep the info coming, your site is very interesting to see parts being made, not just bolted together. Congrats! cheers
Matt G.
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Mobacken Racing
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« Reply #1130 on: November 06, 2015, 03:54:23 PM »

Anders, you are amazing!  So that part does not rotate but is more of an air guide?  Nice castings, I wish you lived a bit closer to San Diego, we could have some fun for sure.  grin  Keep the info coming, your site is very interesting to see parts being made, not just bolted together. Congrats! cheers
Matt G.

Exactly, it is just like the snail compressor housing on a turbocharger.

Thank you very much for the praise! smiley
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saltwheels262
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« Reply #1131 on: November 06, 2015, 06:31:07 PM »

Very nice work.

Bf262
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bub '10 - 158.100  sweetooth gear
lta  7/11 -163.389  7/17/11; 3 run avg.-162.450
ohio -    - 185.076 w/#684      
lta 8/14  - 169.xxx. w/sw2           
'16 -- 0 runs ; 0 events -- made a 2 state change in ZIP codes

" it's not as easy as it looks. "
                            - franey  8/2007
Mobacken Racing
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« Reply #1132 on: November 07, 2015, 11:29:26 AM »

Very nice work.

Bf262

Thank you! I just got off the phone with a friend who will try to figure out the compressor blade profile from the 3D scanned image I emailed him earlier. If he succeeds it won´t be long before I have more castings to make. smiley
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Old Scrambler
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« Reply #1133 on: November 07, 2015, 01:08:47 PM »

Anders............besides all of your skills..........I think the inspiration for all of us is "I got up early..........." smiley smiley smiley
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2011 AMA Record - 250cc M-PG TRIUMPH Tiger Cub - 82.5 mph
2013 AMA Record - 250cc MPS-PG TRIUMPH Tiger Cub - 88.7 mph
2016 AMA Record - 750cc M-CG HONDA CB750 sohc - 130.7 mph
2016 AMA Record - 750cc MPS-CG HONDA CB750 sohc - 137.7 mph
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« Reply #1134 on: November 09, 2015, 07:45:26 AM »

Ha, it it not an option to sleep in when you got small children. I consider 07:00 on a sunday morning to be rather late. smiley
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saltwheels262
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« Reply #1135 on: November 09, 2015, 07:40:33 PM »

If I get up at 6:00 a.m. on the weekends ; that's sleeping in for me .
There are no kids that I know of.

Franey
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bub '07 - 140.293 a/pg   120" crate street mill  
bub '10 - 158.100  sweetooth gear
lta  7/11 -163.389  7/17/11; 3 run avg.-162.450
ohio -    - 185.076 w/#684      
lta 8/14  - 169.xxx. w/sw2           
'16 -- 0 runs ; 0 events -- made a 2 state change in ZIP codes

" it's not as easy as it looks. "
                            - franey  8/2007
Mobacken Racing
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« Reply #1136 on: November 10, 2015, 06:04:57 AM »

If I get up at 6:00 a.m. on the weekends ; that's sleeping in for me .
There are no kids that I know of.

Franey

It´s the early bird that catches the worm and all that.  smiley

On top of the early mornings I gave up drinking completely 6 months ago to free up even more time for the bike build (and all the other projects as well), it makes wonders to the workshop motivation when you suddenly stop being hung over every sunday morning. cheers
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Speed Limit 1000
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« Reply #1137 on: November 10, 2015, 08:43:51 AM »


[/quote]

It´s the early bird that catches the worm and all that.  smiley

[/quote]
So if you are a worm, sleep in and be carefull grin
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John Gowetski, red hat @ 221.183 MPH MSA Lakester, Bockscar #1000 60 ci normally aspirated w/N20
Mobacken Racing
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« Reply #1138 on: November 10, 2015, 03:01:19 PM »

Why does this feel familiar? Luckily I won´t have to mill the diffusor from solid this time like I did with the last engine. smiley



The diffuser was warped a bit but it straightened out after I cut the support wedges that must have bent the plate during casting somehow.



Drilling the centrum hole and the bolt circle, a digital readout for the mill is a very useful tool for things like this.



I´ll use four M10 insex 12.9 bolts to hold the engine core together.



Here I have just finished countersinking the holes for the insex bolt heads.



I had to make a jig to fit the diffuser plate to for the next job.



It was past midnight when I had finished the jig so I called it a night after realizing that my lathe was too small for this job.



Today I used some spare time at work to machine the compressor wheel recess, my job is as a mechanic at a local heating plant so I have a workshop set up there as well with a slightly larger lathe.



After some turning the recess was made with a bit of extra clearance for heat expansion and bearing play.



The compressor wheel looks like it was made for this. smiley



I can´t exactly complain about the casting quality. cool



Cheers!
/Anders
« Last Edit: November 11, 2015, 07:46:58 AM by Mobacken Racing » Logged
aussievetteracer
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« Reply #1139 on: November 11, 2015, 06:41:47 AM »

Mate- your engineering skills and "just do it" attitude never cease to amaze me. I think if USSR got to Wernher von Braun before USA did, way back then, you could have quite comfortably jumped into his shoes, and designed and built Lunar Landers and Atlas launchers in your own little workshop! Like (I believe) most LSR racers, I design, weld, fabricate, etc. everything on my LSR race car in my own shed, in my own little backyard, and think I am OK at it. But I have to admit when I see what you are producing, it reminds me of how much I have yet to learn! Keep up the good work; you are educating (and entertaining) a lot of people on planet Earth.
Regards and best wishes from" Down Under"  Denis
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Denis
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