Which rotor turns in a plane perpendicular to the main rotor and is parallel to the fuselage's longitudinal axis, and is used to control torque and yaw?

Which rotor turns in a plane perpendicular to the main rotor and is parallel to the fuselage's longitudinal axis, and is used to control torque and yaw?

• A. Antitorque Pedal
• B. Antitorque Rotor
• C. Articulated Rotor
• D. Axis of Rotation

Answer: (B)

The anti-torque rotor is the component that provides yaw control by counteracting the torque of the main rotor. In a typical single-rotor helicopter, the engine turns the main rotor, which would make the fuselage want to spin in the opposite direction. The anti-torque rotor, mounted at the tail, spins in a plane perpendicular to the main rotor’s plane (its disk is vertical) and its axis runs along the fuselage’s longitudinal axis. By varying the tail rotor thrust with the anti-torque pedals, you create a counter-torque that yaw-controls the aircraft and lets you steer. The pedal itself is just the control input to adjust this thrust, not the rotor that does the anti-torque work. An articulated rotor refers to a main rotor with hinges, not the anti-torque system, and an axis of rotation is a general term, not a rotor.

The anti-torque rotor is the component that provides yaw control by counteracting the torque of the main rotor. In a typical single-rotor helicopter, the engine turns the main rotor, which would make the fuselage want to spin in the opposite direction. The anti-torque rotor, mounted at the tail, spins in a plane perpendicular to the main rotor’s plane (its disk is vertical) and its axis runs along the fuselage’s longitudinal axis. By varying the tail rotor thrust with the anti-torque pedals, you create a counter-torque that yaw-controls the aircraft and lets you steer. The pedal itself is just the control input to adjust this thrust, not the rotor that does the anti-torque work. An articulated rotor refers to a main rotor with hinges, not the anti-torque system, and an axis of rotation is a general term, not a rotor.