O-Rings as piston rings
- warmstrong1955
- Posts: 3568
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- Location: Northern Nevada
Re: O-Rings as piston rings
No doubt, that if you go outside of the recommended fit, you will have leakage problems.
And to Harold’s point, I agree. If you try to get an o-ring to the same friction ‘feel’ as a cast iron ring, it will probably be out of tolerence, and too loose of a fit.
I’d like to know how it turns out too!
Other Bill
And to Harold’s point, I agree. If you try to get an o-ring to the same friction ‘feel’ as a cast iron ring, it will probably be out of tolerence, and too loose of a fit.
I’d like to know how it turns out too!
Other Bill
Today's solutions are tomorrow's problems.
- tornitore45
- Posts: 2078
- Joined: Tue Apr 18, 2006 12:24 am
- Location: USA Texas, Austin
Re: O-Rings as piston rings
Will report, I am still far away from that part of the construction.
Mauro Gaetano
in Austin TX
in Austin TX
- warmstrong1955
- Posts: 3568
- Joined: Thu Mar 18, 2010 2:05 pm
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Re: O-Rings as piston rings
Oh sure.....keep us in suspense....
Other Bill
Other Bill
Today's solutions are tomorrow's problems.
- steamin10
- Posts: 6712
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- Location: NW Indiana. Close to Lake Michigan S. tip
Re: O-Rings as piston rings
Freind past used O-rings for a Tich. His solution was polished bores and two piece piston that could be adjusted on the rod for crush on the ring. This flies in the face of the way o rings are supposed to float, but it worked famously with little drag, once set up.
Big Dave, former Millwright, Electrician, Environmental conditioning, and back yard Fixxit guy. Now retired, persuing boats, trains, and broken relics.
We have enough youth, how about a fountain of Smart. My computer beat me at chess, but not kickboxing
It is not getting caught in the rain, its learning to dance in it. People saying good morning, should have to prove it.
We have enough youth, how about a fountain of Smart. My computer beat me at chess, but not kickboxing
It is not getting caught in the rain, its learning to dance in it. People saying good morning, should have to prove it.
- tornitore45
- Posts: 2078
- Joined: Tue Apr 18, 2006 12:24 am
- Location: USA Texas, Austin
Re: O-Rings as piston rings
Interesting, butused O-rings for a Tich.
What is a Tich? Steam? OR IC?
Mauro Gaetano
in Austin TX
in Austin TX
Re: O-Rings as piston rings
"Tich" is a small 0-4-0 steam locomotive.
~RN
~RN
Re: O-Rings as piston rings
I'm guessing that your Hoglet is internal combustion?tornitore45 wrote: ↑Tue Jul 17, 2018 5:39 amInteresting, butused O-rings for a Tich.
What is a Tich? Steam? OR IC?
Glenn
Operating machines is perfectly safe......until you forget how dangerous it really is!
Operating machines is perfectly safe......until you forget how dangerous it really is!
- tornitore45
- Posts: 2078
- Joined: Tue Apr 18, 2006 12:24 am
- Location: USA Texas, Austin
Re: O-Rings as piston rings
The Hoglet is so called because is a V twin loosely inspired by the Harley Davidson engine.
Love the picture.
In Italy we call that a Porchetta once is stuffed and roasted.
Love the picture.
In Italy we call that a Porchetta once is stuffed and roasted.
Mauro Gaetano
in Austin TX
in Austin TX
Re: O-Rings as piston rings
Italy, what a great place!
Some day I'll make it back there.
Some day I'll make it back there.
Glenn
Operating machines is perfectly safe......until you forget how dangerous it really is!
Operating machines is perfectly safe......until you forget how dangerous it really is!
Re: O-Rings as piston rings
And delicious!tornitore45 wrote: ↑Tue Jul 17, 2018 3:54 pm The Hoglet is so called because is a V twin loosely inspired by the Harley Davidson engine.
Love the picture.
In Italy we call that a Porchetta once is stuffed and roasted.
H
Wise people talk because they have something to say. Fools talk because they have to say something.
- warmstrong1955
- Posts: 3568
- Joined: Thu Mar 18, 2010 2:05 pm
- Location: Northern Nevada
Re: O-Rings as piston rings
Looks like potential carnitas to me, still on the hoof, speaking of delicious!
Today's solutions are tomorrow's problems.
- tornitore45
- Posts: 2078
- Joined: Tue Apr 18, 2006 12:24 am
- Location: USA Texas, Austin
Re: O-Rings as piston rings
I used this calculator and adjust the numbers to have just over the minimum recommended ring radial compression, I settled for 12% http://www.applerubber.com/oring-gland-calculator/
It turns out the number match what Glenn W posted.
The bore is mirror finish and a funny thing I noticed.
The static friction is much higher than the the moving friction. That is a known fact but usually the difference is not too great.
I put a temporary crank on the V twin and it turn fairly smooth.
Thanks to all that helped.
It turns out the number match what Glenn W posted.
The bore is mirror finish and a funny thing I noticed.
The static friction is much higher than the the moving friction. That is a known fact but usually the difference is not too great.
I put a temporary crank on the V twin and it turn fairly smooth.
Thanks to all that helped.
Mauro Gaetano
in Austin TX
in Austin TX