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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Pitcairn OP ： ウィキペディア英語版 Pitcairn OP The Pitcairn OP (manufacturer designation: PCA-2) was the first rotary-wing aircraft to be seriously evaluated by any of the world's major air forces. The machine was not a helicopter, nor an airplane, but an autogyro. Pitcairn's model was never put into production for any military. ==Development== The Pitcairn-Cierva Autogiro Company, established by Harold Frederick Pitcairn, designed the PCA-2 based on the ''autogiros'' of Juan de la Cierva. The resulting design had a standard aircraft fuselage and powerplant, with a standard tail. However, it sported short, stubby wings, angled up at the wingtips. Above the cockpit was the rotor, consisting of three blades. The engine usually drove a standard propellor, on a vertical plane, in front of the aircraft. However, the engine could be geared to the horizontal rotor during takeoff or landing. The horizontal rotor, while in flight, did not draw energy from the engine but rather generated lift from airspeed. A minimum speed of 30 mph was needed to keep the aircraft in flight. Thus, in moderate winds, the aircraft could behave like a helicopter, except that it could not hover. The Pitcairn autogyro was first evaluated by the US military in the 1930s. In 1931, the Navy tested three prototypes, labelled XOP-1. One was tested with the aircraft carrier ''USS Langley'', on September 23, 1931. The only Pitcairn to see operational service did so in Nicaragua with the US Marines, starting in June 1932. This stint led to the Pitcairn OP-1 being rejected. In 1935, the wings were removed from one Pitcairn autogyro, and the resulting aircraft was redesignated OP-2. 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「Pitcairn OP」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.