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Related to tail rotor: tail rotor roll
(Aeronautics) a small propeller fitted to the rear of a helicopter to counteract the torque reaction of the main rotor and thus prevent the body of the helicopter from rotating in an opposite direction
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|Noun||1.||tail rotor - rotor consisting of a rotating airfoil on the tail of a single-rotor helicopter; keeps the helicopter from spinning in the direction opposite to the rotation of the main rotor|
rotor - rotating mechanism consisting of an assembly of rotating airfoils; "there are horizontal rotors on a helicopter or compressor rotors in a jet engine"