swing wing
Aircraft wing that can be moved during flight to provide a suitable configuration for either low-speed or high-speed flight. The British engineer Barnes Wallis developed the idea of the swing wing, first used on the US-built Northrop X-4, and since used in several aircraft, including the US F-111, F-114, and the B-1, the European Tornado, and several Soviet-built aircraft.
These craft have their wings projecting nearly at right angles for takeoff and landing and low-speed flight, and swung back for high-speed flight.
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