Noun
tail rotor (plural tail rotors)
(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.
Absence of the tail rotor enables the helicopter to perform flat turns within the entire flight speed range. Source: Internet
Also, the coaxial main rotor configuration does not require tail rotor, which can improve survivability. Source: Internet
Department of National Defence The UH-1H's dynamic components include the engine, transmission, rotor mast, main rotor blades, tail rotor driveshaft, and the 42-degree and 90-degree gearboxes. Source: Internet
And it beautifully pierced the tail rotor of the Chinook in front of us." Source: Internet
Despite his best efforts to try and fly between the wires his tail rotor hit one of the earth wires and he spun out of control crashing to the ground. Source: Internet
;HH-2D: Search and rescue helicopter, without any armament or armor but fitted with T58-GE-8F engines and four-bladed tail rotor, 67 conversions from UH-2A and UH-2Bs. Source: Internet