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.91 os engine rebuild ducted fan /helicopter engine parts

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Old 12-15-2018, 06:35 PM
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Jasonwomack
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Default .91 os engine rebuild ducted fan /helicopter engine parts

I just want to find out from someone that knows more than me I have a .91 O.S. ducted fan engine can I use the .91 helicopter engine liner ,piston etc.. to rebuild it just asking because of parts availability please help
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Old 12-16-2018, 06:08 AM
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1QwkSport2.5r
 
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No you cannot. Helicopter engines are typically ringed and those engines cannot handle the RPM. You either find the correct parts or get a new engine. I’d suggest a Novarossi. They make stellar engines and parts are easily available; true chrome too.
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Old 12-18-2018, 11:10 AM
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the Wasp
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another thing, the Heli engine has side exhaust and your engine "should" have rear exhaust

Jim
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Old 12-18-2018, 07:49 PM
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Originally Posted by the Wasp View Post
another thing, the Heli engine has side exhaust and your engine "should" have rear exhaust

Jim
That wouldn’t matter. The port layout will be the same in the liner within in a rear exhaust or side exhaust layout. The only difference is the liner would be turned 90 degrees for a rear exhaust configuration.
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Old 12-18-2018, 07:54 PM
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very cool, thank you for pointing that out !, I will remember that

Jim
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