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Post by Johansson on Feb 28, 2019 6:21:39 GMT -5
Looking at the new gas producer in place is there enough room for the power turbine and exit pipes or will you move the gearbox back Still enough room, the new gas producer is only wider than the old so it has the same length. |
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Post by Johansson on Feb 28, 2019 6:29:03 GMT -5
I have spent a few hours now and then on the bike. The new engine mounts are finished and tightly secures the gas producer to the lower frame tubes.  A slip joint for the interstage duct was turned from a solid chunk of metal and fits inside the NGV ring.  The NGV was carefully welded to the V-band flange that also acts as the burst ring for the C20 freepower wheel.  Finished welding, a cone was also added to the center to guide the gasses toward the vanes.  Here the whole package is test fitted.  A stainless interstage duct will be rolled up to fit the gap.  It is getting there, the bike looks much more potent with the JU-02 engine and a beefy bellmouth. I´ll make a dust screen for it later.  I´m off to work now, cheers! /Anders |
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Post by azwood on Feb 28, 2019 14:20:18 GMT -5
Nice work
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Post by racket on Feb 28, 2019 16:06:44 GMT -5
Hi Anders
Looking good :-)
Yep, you'll need a bit of "flexibility" in the interstage duct to take care of the various expansions, both axial and radial
Cheers
John
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Chuks
Senior Member
Joined: August 2015
Posts: 498 
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Post by Chuks on Feb 28, 2019 16:08:08 GMT -5
nice work Anders
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Mar 1, 2019 12:53:50 GMT -5
I have spent a few hours now and then on the bike. The new engine mounts are finished and tightly secures the gas producer to the lower frame tubes. I´m off to work now, cheers! /Anders Fantastic work Anders! BTW, How did you achieve the seal between the turbine housing and the back plate of the outer case? Is it a metal to metal swaged seal or gasketed? Thanks, Tony |
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Post by Johansson on Mar 1, 2019 16:08:27 GMT -5
Thanks guys! The seal is metal to metal, it can be seen in this old pic where the turbine wheel cover has a recess that fits in the hole in the backplate. The wheel cover is pressed in place between the backplate and the NGV by the six nuts.  Cheers! /Anders |
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Post by azwood on Mar 1, 2019 22:56:46 GMT -5
I have spent a few hours now and then on the bike. The new engine mounts are finished and tightly secures the gas producer to the lower frame tubes. A slip joint for the interstage duct was turned from a solid chunk of metal and fits inside the NGV ring. The NGV was carefully welded to the V-band flange that also acts as the burst ring for the C20 freepower wheel. Finished welding, a cone was also added to the center to guide the gasses toward the vanes. Here the whole package is test fitted. A stainless interstage duct will be rolled up to fit the gap. It is getting there, the bike looks much more potent with the JU-02 engine and a beefy bellmouth. I´ll make a dust screen for it later. I´m off to work now, cheers! /Anders That things looking mean just sitting there. |
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Post by azwood on Mar 1, 2019 22:58:08 GMT -5
I found stainless cunenders make great intake screens
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Post by Johansson on Mar 2, 2019 10:18:14 GMT -5
This morning I made the interstage duct.  I also bought a new racing hat!  Cheers! /Anders |
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Mar 2, 2019 10:36:11 GMT -5
The Mad Scientist.
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Post by azwood on Mar 3, 2019 18:34:03 GMT -5
Nice.that hats a little disturbing haha
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Post by azwood on Mar 3, 2019 18:35:57 GMT -5
That power turbine looks tiny compared to when the ju1 was in front of it.
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Mar 4, 2019 0:04:26 GMT -5
Yes, it does.
And the geometry of the inner and outer diffuser section. Its perfect. Blueprints may not be given but it's not hard to see whats going on there. No slam job. It was thoughtfully engineered for maximum pressure recovery.
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Post by Johansson on Mar 4, 2019 6:03:07 GMT -5
Yes, it does. And the geometry of the inner and outer diffuser section. Its perfect. Blueprints may not be given but it's not hard to see whats going on there. No slam job. It was thoughtfully engineered for maximum pressure recovery. It would be interesting to be able to compare the power output between my old home made NGV and the Allison NGV in a dyno, I think I will gain much from this change. |
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