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Re: Airplane Drag

On Sat, 11 Sep 1999, John Denker wrote:

To a very useful approximation the *skin friction* term goes like V^2. To
a good approximation, n=2 for all V, unless you're talking about Mach
effects or other highly technical things that don't belong on this list.

Interesting!


Anderson and Eberhardt were arguing with Mr. Denker on the grounds that
their explanation of the lifting force works at any velocity, even
trans-sonic, while Mr. Denker's description of airfoils requires
circulation (and circulation cannot exist above the speed of sound.)


Now suddenly Mach effects are "highly technical things" which don't belong
on PHYS-L?


Interesting. Verrrrry interesting. (Says Bill "armchair Freud" Beaty as
he sits on his own couch, psychoanalyzing himself and so the rest of the
world simultaneously.)



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