Originally Posted by FlyingForFun
Really????
FFF
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Well, OK maybe not really.
Perhaps theoretically would be a better adjective.. I must be a bit of a sad case to be into this kind of thing.
The numbers come from a textbook on light aircraft performance by a chap called John Lowry. For a better explanation you might ask Genghis on the Flight Testing forum who I am sure understands this stuff much better than I do.