4 ms·
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 creatin
by bbojan 5y ago
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.
- tomsto 5y agoFor 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&assumption=%7B%22F%22%2C+%22AirfoilAngleOfAttack%22%2C+%22a%22%7D+-%3E%220%22 https://www.wolframalpha.com/input/?i=NACA+6409+airfoil&assu...