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Old 05-15-2009, 02:29 PM   #19 (permalink)
aerohead
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Quote:
Originally Posted by Ernie Rogers View Post
I'M STILL WAITING--ANYBODY OUT THERE HAVE ANY INFORMATION?

(Correction on Reynolds number: 65 million)

Ernie Rogers
The ideal teardrop form(about 2.7:1 fineness ratio) outside of ground effect has a Cd 0.04.I believe Morelli developed a low drag form of which Aptera borrows from.It was never tested in ground-effect.---- Any lengthening of the ideal teardrop body of revolution exhibits an increase in drag do to skin friction.I believe Cd 0.04 is the limit.Any environmental structure within close proximity will degrade the Cd.
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