VERTOL VZ-2 (Model 76), 1960. Photo: NASA.
Bell Model 30, c. 1943.
Left side view from slightly forward of Sikorsky VS-300A in low-level hovering flight, piloted by test pilot Les...
Bell X-14A NASA 234 At Ames Lab, Moffett Field, May 23, 1962. USAF 56-4022.
DAYTON, Ohio -- Sikorsky YH-5A at the National Museum of the United States Air Force. (U.S.
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