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Pescara Model 3 Helicopter
The Pescara Model 3 was the first of several coaxial helicopter designs by Raúl Pateras Pescara to demonstrate sustained controlled helicopter flight.
==Development==
Argentinian engineer Pescara started helicopter development in 1916. Alberto Santos-Dumont helped fund experimentation on designs in France. Multiple examples were built, demonstrated, crashed, improved and rebuilt owing to conflicting and different names for the various versions. Anticipating success with the counter-rotating mechanism, Pescara patented a design with a streamlined fuselage with one set of rotors above, and one below the fuselage.〔(【引用サイトリンク】url=http://www.google.com/patents/US1527701 )〕
The model three was the first example to use control mechanisms as modern helicopters. The helicopter is based around a central shaft with counter-rotating rotors. Each rotor was doubled into a biplane arrangement with cable supports. It used a cyclic stick for forward and lateral control with rotor warping, and wheel for yaw anti-torque control. The main rotor shaft was able to tilt slightly for forward control. The rotors were also capable of autorotation in case of engine failure.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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