Sikorsky XH-39
Автор:
Jesse Russell,Ronald Cohn, ISBN:
978-5-5121-6723-6
High Quality Content by WIKIPEDIA articles! The Sikorsky XH-39 (manufacturer designation S-59), developed by Sikorsky Aircraft in 1954, was the U.S. Army’s first turbine-powered helicopter. It was fast and innovative, but ultimately rejected by the...
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