Re:Why we don’t understand heavier-than-air flight
by bbojan on Saturday June 26, 2021 @06:40AM
(#27640789)
Is that so? I thought that for asymmetric airfoil, zero angle of attack is by definition the angle where it creates no lift. So, tautologically, if it's creating lift a (positive) angle of attack is required.
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Re:Why we don’t understand heavier-than-air flight
by tomsto on Saturday June 26, 2021 @06:56AM
(#27640847)
For a symmetric aerofoil, 0 angle of attack is 0 lift. For an asymmetric - there is (some) lift, which comes entirely from the suction side.
https://www.wolframalpha.com/input/?i=NACA+6409+airfoil&assu...