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tail rotor
Definição1
The tail rotor is a smaller rotor mounted vertically or near vertically on the tail of a traditional single-rotor helicopter. The tail rotor either pushes or pulls against the tail to counter the torque. The tail rotor drive system consists of a drive shaft powered from the main transmission and a gearbox mounted at the end of the tail boom.
Fonte1
FEDERAL AVIATION ADMINISTRATION. Helicopter flying handbook (FAA-H8083-21A). Washington, DC: FAA, 2012.
Definição2
A rotor turning in plane perpendicular to that of the main rotor and parallel to the longitudinal axis of the fuselage. Used to control the torque of the main rotor and to provide movement on the yaw axis of the helicopter.
Fonte2
KUMAR, Bharat (ed.). An illustrated dictionary of aviation. New York: McGraw-Hill, c2005. 752 p.
Fonte3
SCHAFER, Joe. Helicopter maintenance. Englewood: Jeppesen Sanderson, Inc., c2007. viii, 343 p.
Contexto
When a single-rotor helicopter flies through translational lift, the air flowing through the main rotor and over the tail rotor becomes less turbulent and more aerodynamically efficient.
Subárea1
Engine
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anti-torque rotor
Português
rotor de cauda
Imagem

 Traditional tail rotor of an Aérospatiale Puma.

Traditional tail rotor of an Aérospatiale Puma.

Fonte: http://en.wikipedia.org/wiki/File:Puma_tail_rotor.jpg