Author Topic: APS/Ω Gas turbine bike build  (Read 931046 times)

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Offline wobblywalrus

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Re: APS/Ω Gas turbine bike build
« Reply #435 on: April 15, 2014, 10:45:36 PM »
It is looking good, Anders. 

Offline Mobacken Racing

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Re: APS/Ω Gas turbine bike build
« Reply #436 on: April 16, 2014, 05:47:35 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.

Offline Mobacken Racing

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Re: APS/Ω Gas turbine bike build
« Reply #437 on: April 17, 2014, 01:21:24 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 I´ll deal with the bearings next week.



Cheers and happy holiday!!!!!
/Anders

Offline Peter Jack

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Re: APS/Ω Gas turbine bike build
« Reply #438 on: April 17, 2014, 03:04:32 PM »
Enjoy the holiday Anders. You've definitely earned the break.  :cheers: :cheers: :cheers:

Pete

Offline Mobacken Racing

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Re: APS/Ω Gas turbine bike build
« Reply #439 on: April 17, 2014, 04:53:08 PM »
Thanks Peter!

By the way I´ve 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... :-)



My bike engine and my boat engine, a bit of a size difference.



The newly built engine casing, 1.5mm stainless instead of the original 0.5mm.



The engine in its test stand.



Turning the power turbine shaft down to size.


Power turbine ready with bearings, sleeve and primary chain sprocket.



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

Offline maj

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Re: APS/Ω Gas turbine bike build
« Reply #440 on: April 17, 2014, 05:15:05 PM »
Be as broad as you want, its your thread and its interesting  :cheers:

Have a happy Easter

Offline Buickguy3

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Re: APS/Ω Gas turbine bike build
« Reply #441 on: April 17, 2014, 09:29:10 PM »
   Love it, Anders.
   Doug  :cheers: :cheers: :cheers:
I keep going faster and faster and I don't know why. All I have to do is live and die.
                   [America]

Offline Glen

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Re: APS/Ω Gas turbine bike build
« Reply #442 on: April 18, 2014, 11:20:33 AM »
Your projects are so interesting, lots of cool ideas and super craftsmanship.  :cheers:
Glen
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South West, Utah

Offline Mobacken Racing

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Re: APS/Ω Gas turbine bike build
« Reply #443 on: April 18, 2014, 02:40:13 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.  :-)

Offline grumm441

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Re: APS/Ω Gas turbine bike build
« Reply #444 on: April 21, 2014, 05:41:44 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
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Offline Mobacken Racing

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Re: APS/Ω Gas turbine bike build
« Reply #445 on: April 22, 2014, 12:12:33 AM »
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...

Offline grumm441

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Re: APS/Ω Gas turbine bike build
« Reply #446 on: April 22, 2014, 07:03:27 AM »
Perhaps one of those small turbines for my Heinkel Tourist?
G
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Offline Mobacken Racing

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Re: APS/Ω Gas turbine bike build
« Reply #447 on: April 24, 2014, 12:18:25 AM »
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. :-)



Taking the power turbine section apart to get to the gearbox.



Here you can see the output shaft gear...



...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.



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 won´t 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 I´d rather not do that.



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 don´t 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 won´t run dry but that will only be another point on the pre run check list. I´ll 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

Offline tauruck

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Re: APS/Ω Gas turbine bike build
« Reply #448 on: April 24, 2014, 11:48:44 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.

Offline Rex Schimmer

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Re: APS/Ω Gas turbine bike build
« Reply #449 on: April 25, 2014, 02:21:44 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
Rex

Not much matters and the rest doesn't matter at all.