coaxial rotors

(redirected from Contra-rotating rotors)

coaxial rotors

A rotor system in which two rotors are mounted on the helicopter rotating in the opposite direction but running on concentric shafts. There is thus no residual torque.
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References in periodicals archive ?
It seems ironic that, while Sikorsky is now developing projects with contra-rotating rotors, Kamov, the leader in that field, has switched to a single main rotor (and ducted tail rotor) for its 6.
6-tonne Sikorsky X2 compound helicopter, which has contra-rotating rotors and a pusher propeller.
Caption: Although a leader in contra-rotating rotors, Kamov has switched to a single main rotor for its new Ka-62, which may be militarised for domestic defence and paramilitary operators.
Yaw moments are minimized by using contra-rotating rotors, and controlling the relative speed of each rotor.
Sikorsky is targeting the third quarter to achieve the 250kt (460km/h) goal for its X2 high-speed prototype, concept demonstrator with twin contra-rotating rotors and a pusher prop, after several delays in the flight-test program.
The coaxial contra-rotating rotors of the Alligator allow you to perform some really amazing maneuvers, and the use of stick controls for this sim is a given.
A 1930 US patent by George Lehberger illustrated a single-engine helicopter with coaxial, contra-rotating rotors and a drive shaft that was articulated just above the fuselage.
Sikorsky Aircraft Sikorsky is targeting the third quarter to achieve the 250kt (460km/h) goal for its X2 high-speed prototype, concept demonstrator with twin contra-rotating rotors and a pusher prop, after several delays in the flight-test program.