The Curtiss-Wright X-19 was a tandem tilt-propeller V/STOL research aircraft developed to demonstrate the feasibility of powered-lift operations and the tandem tilt-rotor concept. Its four propeller/rotor powerplants supported hover, transition and conventional flight research for military transport, reconnaissance and support missions; two aircraft were built, one flew 50 flights from 1963 to 1965, and the program ended after an accident.
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