книги Наука, техника, медицина Гуманитарные науки Общественные науки Социология Общая и теоретическая социология Социальные конфликты

Platt-LePage XR-1

Код 2337923

  • ISBN: 978-5-5106-5112-6

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High Quality Content by WIKIPEDIA articles! The Platt-LePage XR-1, also known by the company designation PL-3, was an early American twin-rotor helicopter, built by the Platt-LePage Aircraft Company of Eddystone, Pennsylvania. The winner of a United States Army Air Force design competition held in early 1940, the XR-1 was the first helicopter tested by the USAAF, flying in 1941. The flight testing of the XR-1 proved troublesome, and although continued testing showed that the design had promise, other, improved helicopters were becoming available before the XR-1 was ready for service. As a result, the development of the aircraft was terminated in 1945.

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ISBN: 978-5-5106-5112-6

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Биология Здравоохранение Основы медицины, учебная литература

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