What is the pedal used to control the pitch of the tail rotor or air diffuser in a NOTAR system called?

What is the pedal used to control the pitch of the tail rotor or air diffuser in a NOTAR system called?

• A. Antitorque Pedal
• B. Antitorque Rotor
• C. Autopilot
• D. Blade Damper

Answer: (A)

In a NOTAR system, yaw control comes from directing air through a tail diffuser rather than using a tail rotor. The pedal that adjusts this yaw control is called the antitorque pedal because its job is to produce the anti-torque moment needed to balance the torque of the main rotor. When you move the pedal, it changes the pitch of the tail diffuser, which alters the amount and direction of the yawing moment the helicopter experiences. This lets you steer left or right without a tail rotor. The other terms don’t fit: a tail rotor would imply a conventional tail rotor system; autopilot is a separate system; a blade damper is for reducing vibration, not for controlling yaw.

In a NOTAR system, yaw control comes from directing air through a tail diffuser rather than using a tail rotor. The pedal that adjusts this yaw control is called the antitorque pedal because its job is to produce the anti-torque moment needed to balance the torque of the main rotor. When you move the pedal, it changes the pitch of the tail diffuser, which alters the amount and direction of the yawing moment the helicopter experiences. This lets you steer left or right without a tail rotor. The other terms don’t fit: a tail rotor would imply a conventional tail rotor system; autopilot is a separate system; a blade damper is for reducing vibration, not for controlling yaw.