Kellett K 2/K 3 Autogiro, cross between plane & helicopter. This K 2 was 1st autogiro tested by Army Air Corps, in 1931. (8018)
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Australian Army Sikorsky S 70 A 9 Black Hawk Battlefield Helicopter
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1972, APRIL 1973, JANUARY CHRIS HIRD, INSIDE A VISITING ARMY HELICOPTER..jpg
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9/20/2021 US Army Boeing MH 47G Chinook Special Operations Helicopter 04 03738
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Sikorsky R 4B: The R 4 was the world's first production helicopter, and the U.S. Army Air Forces' 1st service helicopter. (8235)
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