Sikorsky XR-4 Helicopter

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Right side view of US Army Sikorsky XR-4 helicopter [Vought-Sikorsky XR-4C, s/n  41-18874 , A19600307000], right side fuselage uncovered, on exhibit in the Smithsonian Institution Aircraft Building, 1961

ID #:

NASM A-46679-D

Source:

National Air and Space Museum Archives, Smithsonian Institution

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Smithsonian Institution

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