The Sikorsky XH-39 (manufacturer designation S-59), developed by Sikorsky Aircraft in 1954, is the U.S. Army's first turbine-powered helicopter. It was fast and innovative, but ultimately rejected by the United States Army in favor of the Bell UH-1 Iroquois.
The Sikorsky XH-39 (manufacturer designation S-59), developed by Sikorsky Aircraft in 1954, is the U.S. Army's first turbine-powered helicopter. It was fast and innovative, but ultimately rejected by the United States Army in favor of the Bell UH-1 Iroquois.
Source: Wikipedia "Sikorsky XH-39" · CC BY-SA 4.0
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