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Fairey Jet Gyrodyne
The Fairey Jet Gyrodyne was a British experimental compound autogyro built by the Fairey Aviation Company that incorporated helicopter, gyrodyne and autogyro characteristics. The Jet Gyrodyne was the subject of a Ministry of Supply (MoS) research contract to gather data for the follow-up design, the Rotodyne.
==Design and development==
The Jet Gyrodyne was a modification of the second prototype FB-1 Gyrodyne aircraft registered ''G-AJJP''. The Jet Gyrodyne was built specifically to develop the pressure-jet rotor drive system and operational procedures used on the later Rotodyne.
The Jet Gyrodyne utilised the fuselage, undercarriage and engine of the FB-1 Gyrodyne. The Alvis Leonides nine-cylinder radial engine was situated in the middle of the fuselage and drove a pusher propeller at the tip of each stub wing and two Rolls-Royce Merlin engine superchargers. The original three-blade tilting hub rotor system was replaced by a two-blade rotor controlled with swashplate-actuated cyclic and collective pitch controls. An empennage provided the necessary stabilization about the pitch and yaw axes.
For takeoff, landing, and low-speed flight, the rotor was driven by air delivered by the superchargers and burnt with fuel in blade-tip mounted pressure-jets. This zero-torque rotor drive did not require a compensating anti-torque system, though the collective pitch of the wingtip-mounted propellers was controlled by the rudder pedals to provide yaw control. As airspeed was gained, the rotor drive system was shut down, allowing the rotor to autorotate while the propellers provided the necessary thrust. For low-speed flight and landing, the rotor drive system was restarted to provide hovering capability.
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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