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Author Topic: APS/Ω Gas turbine bike build  (Read 554547 times)
0 Members and 3 Guests are viewing this topic.
saltwheels262
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« Reply #840 on: February 03, 2015, 10:47:21 AM »

any idea what other rules were prompted ?
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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
grumm441
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« Reply #841 on: February 03, 2015, 03:48:33 PM »

any idea what other rules were prompted ?

I think it was lanyard and support vehicle
G
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Chief Motorcycle Steward Dry Lakes Racers Australia Inc
Wazavudu Bellytank  Spirit of Sunshine Bellytank
Mobacken Racing
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« Reply #842 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.
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Mobacken Racing
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« Reply #843 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! Smiley

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.



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...



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.



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.



Cheers!
/Anders
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Old Scrambler
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« Reply #844 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.
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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
2018 AMA Record - 750cc M-CG HONDA CB750 sohc - 136.6 mph
2018 AMA Record - 750cc MPS-CG HONDA CB750 sohc - 143.005 mph
2018 AMA Record - 750cc M-CF HONDA CB750 sohc - 139.85 mph
2018 AMA Record - 750cc MPS-CF HONDA CB750 sohc - 144.2025 mph

Chassis Builder / Tuner: Dave Murre
MattGuzzetta
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« Reply #845 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! grin

Matt Guzzetta
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Glen
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« Reply #846 on: February 05, 2015, 09:19:56 PM »

Matt, are you going to run this yeay?

Glen Barrett
Team Vesco.
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Glen
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Mobacken Racing
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« Reply #847 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! grin

Matt Guzzetta

That sounds like a good seat material, I´ll ask some boat guys I know if they have heard of it. Thank you very much for your praise! smiley
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Mobacken Racing
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« Reply #848 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!



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 doesen´t matter if a bit of oil/moisture gets into them.



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.



Unless I manage to kick it away while mounting the bike it will stay in place. smiley



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.



Cheers!
/Anders
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saltwheels262
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« Reply #849 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.
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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 #850 on: February 09, 2015, 11:37:27 AM »

Hmm, you are right about that. I think we´ll use it anyway though, I´ll 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. smiley
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Glen
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« Reply #851 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.
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Glen
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« Reply #852 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
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Jon E. Wennerberg
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saltwheels262
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« Reply #853 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.
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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
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« Reply #854 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.


* Franey's bike trailer.jpg (388.4 KB, 2048x1536 - viewed 198 times.)
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Jon E. Wennerberg
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 Skandia, Michigan
 (that's way up north)
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