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Sikorsky YR-4B (first helicopter to be used by the USAF) # 42-107237. It crashed in Burma July 29, 1945. In the background of the first photo, a North American B-25C Mitchell. The second, in bad shape, a North American B-25J-1-NC Mitchell's 341st BG 11th BS.

Sikorsky YR-4B (first helicopter to be used by the USAF) # 42-107237. It crashed in Burma July 29, 1945. In the background of the first photo, a North American B-25C Mitchell. The second, in bad shape, a North American B-25J-1-NC Mitchell's 341st BG 11th BS.

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Sikorsky Chickasaw Cargo Helicopter

May 6, 1941: Igor Sikorsky sets a world endurance record for helicopter flight of 1 h 32 min in a Sikorsky VS-300 in Conneticut

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Sikorsky Raider-rollout.jpg

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