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Colyn,
A still prop only has the drag of the blade whilst the windmilling prop is
like a drag disc. Uh, see the Y-axis, where flatter pitch equal
greater parasitic drag - the same effect that is used in
controlled auto-rotation descent of a helicopter.
Scott
In a message dated 12/18/2009 9:20:10 A.M. Central Standard Time,
colyncase@earthlink.net writes:
great post, Scotty. ....but I've never understood the physics
of why a windmilling prop has so much more drag than a stationary prop.
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