Bell X-5
Aircraft model
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The Bell X-5 was the first aircraft capable of changing the sweep of its wings in flight. It was inspired by the untested wartime P.1101 design of the German Messerschmitt company. Wikipedia
Engine type: Allison J35
Top speed: 716 mph
Wingspan: 33′ 0″
First flight: June 20, 1951
Cruise speed: 600 mph
Number built: 2
Primary users: United States Air Force; National Advisory Committee for Aeronautics