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YO-51 Dragonfly : ウィキペディア英語版
Ryan YO-51 Dragonfly

The Ryan YO-51 Dragonfly was an observation aircraft designed and built by Ryan Aeronautical for the United States Army Air Corps (USAAC). A single-engined parasol wing monoplane, it was designed for optimum STOL capability, but although three prototypes proved highly successful in testing, the Stinson YO-49 was judged superior and no production contract was placed.
==Design==
The design of the YO-51 Dragonfly was typical for aircraft of its type, being optimised for the observation and liaison role, with emphasis on the ability to operate out of the smallest possible airfields.〔Penfield 1941, p.31.〕 The Dragonfly was a high-wing braced parasol monoplane with fixed tailwheel landing gear, a two-seat open cockpit, and full-span slots and Fowler flaps for STOL capability. It was powered by a single Pratt & Whitney R-985-21 Wasp Junior radial engine.〔Donald 1997, p.794.〕
At gross weight, the YO-51 could, without flaps, take off after a run of 400 feet, while with full flaps the takeoff run would be only 75 feet, or just four feet more than twice its own length.〔Fowler 1948, p.79.〕 The Dragonfly was capable of maintaining level flight at speeds as low as ,〔Rowe 2006, p.22.〕 and was claimed as being capable of landing in a distance shorter than the length of the aircraft itself.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Ryan YO-51 Dragonfly」の詳細全文を読む



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