First flight of the Sikorsky S-52

Wednesday, February 12, 1947



The type subsequently saw operational service as the HO5S-1 and YH-18 with the U.S. Armed Forces. This was the first U.S. helicopter with all-metal main and tail rotor blades.

Source: "The Rotary Wing Legacy", Sikorsky Archives | Sikorsky Product History, last accessed Apr 30, 2018


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