miuge
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Post by miuge on May 25, 2014 5:59:16 GMT -5
As you can see there's an oil seal behind the sprocket and original piston ring seals turbine end. Video clip of "drivetrain" manufacturing: vimeo.com/96170633
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miuge
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Post by miuge on May 24, 2014 15:22:05 GMT -5
That thing is HUGE! Any calculations how much thrust it will make?
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miuge
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Post by miuge on May 24, 2014 15:19:17 GMT -5
Build and try is a good way to start! I think that the flametube itself and air inlet are in more significant role which effect to the combustion process.. Everything what happens after that would only have effect to efficiency like Chris said
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miuge
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Post by miuge on May 23, 2014 16:09:49 GMT -5
Instrument panel with gauges for fuel pressure, oil pressure, TOT and P2, still need one gauge for power turbine pressure. Our machinist made a sleeve for a tank cap. Also we got a "new" 30Amp battery: Middle stand, no more need for a wooden rack, bricks whatsoever:
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miuge
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Post by miuge on May 23, 2014 2:11:24 GMT -5
That's a really compact assembly! If we had a similar engine we could have built a lot smaller bike
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miuge
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Post by miuge on May 21, 2014 1:10:20 GMT -5
Good to know! We'll try first feed line on top so there won't be much oil in the bearing housing, then the return is somewhat the same level as the bottom of bearing housing. Yesterday I was thinking where should I put the oil breather hose.. now I know I also made an adapter for the front brake, my friend found a suitable Honda NS125R caliper from his stash. Rear brake will be operated from the clutch lever..
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miuge
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Post by miuge on May 20, 2014 2:07:00 GMT -5
Thanks again! I don't know yet how much it will be restricted, we'll make it adjustable, so the x-amount bleed oil will circulate through powerturbine. Is there any disadvantage if we put the oil feed line on bottom and return to the top, it would give better lubrication as the CHRA would be filled with oil..
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miuge
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Post by miuge on May 19, 2014 16:22:55 GMT -5
Not sure about that.. How do you lock turbineshaft's axial motion then? Today I made a bracket for the powerturbine: We got a 120/70-12 rear tyre, it's a bit streched but we couldn't find any better for our budget: i187.photobucket.com/albums/x281/mice325/Project%20Jatkettu/IMG_3644_zps7dca7040.jpgI started to create fuel tank of a 170mm aluminium pipe, battery sits nice in front of the tank:
Spent a moment with photoshop, what do you think?
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miuge
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Post by miuge on May 18, 2014 8:21:18 GMT -5
We use a shim plate between the turbinewheel and bearing so that bearings' inner rings, center sleeve and the sleeve for the sprocket are one joint, then the lock nut tighten the whole package.
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miuge
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Post by miuge on May 18, 2014 4:08:19 GMT -5
Yes S500 shaft had a 17,4mm diameter which we ground to a 17mm. Just make a sleeve something like this (14mm shaft, 6203 bearings, bearing distance X):
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miuge
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Post by miuge on May 17, 2014 14:57:25 GMT -5
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miuge
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Post by miuge on May 15, 2014 14:17:41 GMT -5
That doesn't look bad at all! Shouldn't weight more than 5kg as you used aluminium in the CHRA.
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miuge
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Post by miuge on May 15, 2014 4:06:39 GMT -5
I'm a bit pissed I hadn't enough patience make it better Now it's hard to make comparison between two as the scroll is completely welded. I wish I had a flow analysis program to give any directional info of that. Anyway this sheetmetal scroll has a lot bigger shape and internal surface area than the segmented scroll, as I kind of copied the shape of a S300 turbine housing. Segmented scroll had a more constantly tapered shape. Remember that performance wasn't really the main point in this entire bike build, things are just going to get out of hand sometimes
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miuge
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Post by miuge on May 14, 2014 12:10:07 GMT -5
Soon... First we'll try driving with propane and later make it run with diesel.
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miuge
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Post by miuge on May 13, 2014 2:59:43 GMT -5
Glad to hear you John again I used your housing as inspiration to build mine, bits between the scroll were obvious to have before welding the sheetmetal part, despite of it we still used quite big clearence. Don't worry about the segmented scroll, it's still at the garage wall as decoration.. Anders, just use the steps seen at manufacturing video and you'll end up to something similar
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