What is the function of the anti-torque pedals in the TH-73A?

• A. To control the pitch of the rotor blades
• B. To control the yaw of the helicopter and counteract torque from the main rotor
• C. To adjust the altitude of the helicopter
• D. To manage the throttle input during flight

Answer: (B)

The function of the anti-torque pedals in the TH-73A is to control the yaw of the helicopter and counteract the torque generated by the main rotor. As the rotor blades spin, they create a rotational force that tends to turn the helicopter in the opposite direction. The anti-torque pedals are used by the pilot to apply additional rotor blade pitch in the tail rotor. This compensates for the torque effect and allows the helicopter to maintain a stable heading.

When the pilot presses one pedal, it increases the thrust from the tail rotor in one direction, causing the helicopter to yaw in that direction. Conversely, pressing the other pedal decreases the thrust, allowing the helicopter to yaw in the opposite direction. This control is critical for maneuvering the helicopter efficiently, maintaining controlled flight, and ensuring precise directional control during various phases of flight.

The other functions listed do not pertain to the role of the anti-torque pedals. For instance, controlling the pitch of the rotor blades directly relates to the collective and cyclic controls, adjusting altitude refers to collective input, and managing throttle input relates to the engine management system rather than yaw control.