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Gang,
I don't have it here at work, but I believe John Schwaner wrote in his
book "The Sky Ranch Engineering Manual" (a **very** good book on piston
aircraft engines) that having the prop drive the engine was bad because it
causes the piston rings to slap back and forth in their channels in the
pistons. This could lead to breakage of the rings.
BTW, I highly recommend this book to anyone that wants to know more about
the "whys" of piston aircraft engines. John's web site is:
http://www.sacskyranch.com.
Regards,
Dan Olsen
320 MKII, 85%
Fort Collins, CO
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