A rotating part of a mechanical device; for example, in an electric motor, generator, alternator, or pump. / (aviation) The wing of a helicopter or other rotary-wing aircraft.

plural of rotor

(chiefly in combination) Having a rotor or rotors.

A type of rotor that consists of a laminated core which is cylindrical in shape and carries AC current across it. Slip rings are mounted on the shaft.

plural of wound rotor

(aviation) A small rotor mounted vertically at the end of the tail of a single-rotor helicopter so as to develop thrust in the same direction as the main rotor's rotation, to counter the torque effect created by the main rotor.

plural of tail rotor

A smooth cylinder with disc end-plates which is spun along its long axis and, as air passes at right angles across it, the Magnus effect causes an aerodynamic force to be generated in the direction perpendicular to both the long axis and the direction of air flow.

plural of Flettner rotor

An unpowered rotary-wing aircraft.