'Singing Wings' Increase Lift At Low Speeds

New technology that uses a plastic coating that makes sound can increase the lift of small airplane wings at low speeds by 22 percent, which could prevent stalls long enough for pilots to regain airspeed or come out of a turn. Invented by an Australian Quantas engineer doing research at the University of New South Wales, the invention, which could be applied as a film coating to parts of the wing, actually prevents -- or, at least, delays -- the separation that occurs with a too-high angle of attack.