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#7
May 9th 04, 05:29 PM
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On 8 May 2004, Jay wrote:
I've been wondering which shape is lower drag, a rounded one or a sharp one. The most instructive seminar I've attended was one by John Ronce at Oshkosh a few years ago. He began by drawing a three foot long airfoil shape, then drew a one-quarter inch dot (the profile of a cable), he said that each had the same drag. Very hard to believe. He also said that air will create its own nose profile, against a blunt or flat shape, that is why wings can have a round front for better angle- of-attack tolerance. The drag is caused more by turbulent flow trailing the part. I left the talk dumbfounded, and still am. George Graham RX-7 Powered Graham-EZ, N4449E Homepage http://bfn.org/~ca266 
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