Boeing Vertol YUH-61
978-613-0-86689-1
6130866895
132
2010-06-22
45.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Boeing Vertol YUH-61 , a twin turbine-engined, medium-lift, military assault/utility helicopter was the runner-up in a United States Army competition in the mid 1970s to replace the Bell UH-1 "Huey" family. Though the two final competing designs were both developed to Army specifications, Sikorsky's aircraft was selected. Under a contract awarded in August 1972, Boeing Vertol designed and delivered three prototypes to compete against the Sikorsky YUH-60A in the US Army's Utility Tactical Transport Aircraft System program. While Boeing Vertol failed to win the competition, it pinned its hope on winning civil orders and the US Navy's LAMPS III program. In the end, a variant of the Sikorsky design, the SH-60B, would also win, and what civil orders that were received were canceled. Three aircraft were built and a further two were cancelled and not completed.
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航空和航天技术
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