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Old 12-31-2014, 06:52 PM   #31 (permalink)
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prop efficiency

I think Hoerner gave props a maximum of around 87% mechanical efficiency for applying power to the air.
A NASCAR micro-finished driveline with 1:1 output Gear Vendors (Doug Nash Racing) transmission would be looking at around 94% overall efficiency,from flywheel to tire/road interface.

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