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Tandem-rotor helicopters have the advantage of being able to hold more weight with shorter blades, since there are two sets. However, the rear rotor works in the aerodynamic shadow of the front rotor, which reduces its efficiency. This loss can be minimized by increasing the distance between the two rotor hubs, and by elevating one hub over the ...
The two rotors were synchronised through a shaft to prevent blade collision, allowing the aircraft to operate through only one engine in the event of an emergency. In that case, the remaining engine would automatically run up to double power to compensate. [4] Bristol attempted to market a civilian variant of the helicopter, designated the Type ...
A transverse-rotor aircraft is an aircraft with two large horizontal rotor assemblies mounted side by side. Single-rotor helicopters (unicopters) need an additional tail rotor or tail exhaust to neutralize the reactional angular momentum produced by the main rotor. Transverse rotor helicopters, however, use counter-rotating rotors, with each ...
Revolution Helicopter Corporation (defunct) – went out of business in November 1999; Robinson Helicopter [18] RotorWay International – produces kit helicopters [28] Sikorsky Aircraft [56] Schweizer Aircraft – acquired by Sikorsky Aircraft in 2004 and closed down in 2011 and 2012 [57] Spitfire Helicopter Company [26]
This is a list of rotorcraft, including helicopters, autogyros, rotor kites and convertiplanes. Lists of aircraft; 0–Ah; Ai–Am; An–Az; B–Be; Bf–Bo; Br–Bz ...
The Type 173 was a tandem rotor development of the earlier Type 171 Sycamore single-rotor helicopter. It used two Sycamore Leonides Major engine and rotor installations with a new fuselage. [2] The rotor gearboxes were connected by a shaft which enabled one engine to drive both rotors if an engine failed. [2]
An intermeshing-rotor helicopter (or synchropter) is a helicopter with a set of two main rotors turning in opposite directions, with each rotor mast mounted with a slight angle to the other, in a transversely symmetrical manner, so that the blades intermesh without colliding.
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