Rotary-wing aircraft
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A rotary-wing aircraft is a broad category of any aircraft with a moving wing, including helicopters and autogyros. This is to distinguish from fixed-wing aircraft. A third type, tilt-wing (or tilt-rotor) aircraft, are a mix of the two, as the lift surfaces in vertical flight are rotary, but stationary in forward flight. An ornithopter is niether fixed-wing nor rotary-wing.
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