The Sikorsky XR-4 41-18874 at Wright Field, 17 May 1942. Left to right: E. Walsh, A. Planefisch, Igor Sikorsky, Orville Wright, R. Alex, Les Morris, B. Labensky. (Sikorsky Archives)
Sikorsky XR-4 (VS-316A) 41-18874 at Wright Field, 17 May 1942.
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