Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

? Car truck engine on a plane?????????????

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Old 01-06-2005, 11:26 PM
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GESCALEMAN
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Default ? Car truck engine on a plane?????????????

hAS ANYONE PUT A CAR TRUCK ENGINE ON A PLANE. I KNOW THEY DON'T HAVE AS MUTCH TORK BUT WHAT THEY DO HAVE IS RPM. SURE WOULD LIKE TO GIVE IT A TRY.
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Old 01-08-2005, 01:27 PM
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cobratraxxas69
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Default RE: ? Car truck engine on a plane?????????????

Yeah I wonder about that too!!

I had a On-Road 1/8 scale .21 size racing engine that went over 40,000 RPMs.

It's rare to see an airplane engine do over 23,000 RPM

I mean they do have larger than normal cooling heads...why wouldn't they work (could the torque really be that low or is there some other issue--I know the displacements are around .21 to .26 --which is smaller than our typical .40-.46 --is that what reduces the torque?)

-Mike
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Old 01-08-2005, 03:41 PM
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combatpigg
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Default RE: ? Car truck engine on a plane?????????????

I think there is a speed plane application for a .21. The torque of an engine is determined by the length of the stroke, and the length of time that the exhaust gas spends in the cylinder during the downward push. A high rpm engine has the exhaust port up high and the exhaust cycle lasts longer than a sport engine. The intake port is open longer on a high rpm engine too. The high rpm design compromises low speed and big prop performance. I think it would be a neat project to try a purpose built speed plane with a hot .21. Maybe a .10 sized SHRIKE would make a good plane to try it out?
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Old 01-08-2005, 09:26 PM
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BruceDana
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Default RE: ? Car truck engine on a plane?????????????

Perhaps on an F5B/Hotliner or simillar pylon racer (like these: http://www.nesail.com/categories.php...16270970658411) ???
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