Counter-torque is achieved by which means?

Counter-torque is achieved by which means?

• A. Anti-Torque/Tail Rotor Thrust
• B. Increased Main Rotor Power
• C. Elevating The Helicopter
• D. Rudder Deflection

Answer: (A)

Counter-torque comes from the tail rotor producing a thrust that creates an opposite yawing moment to balance the engine’s torque on the main rotor. When the engine turns the main rotor, the fuselage would tend to spin in the opposite direction. The tail rotor pushes air to the side at the tail, generating a horizontal force that twists the helicopter the other way, canceling that reaction. You adjust how much anti-torque is needed with the pedals, which change the tail rotor thrust. Increasing main rotor power would increase the torque you have to counter, making the problem worse; elevating the helicopter or using rudder alone doesn’t provide the required counter-torque in hover or low-speed flight. So, tail rotor thrust is the mechanism that achieves counter-torque.

Counter-torque comes from the tail rotor producing a thrust that creates an opposite yawing moment to balance the engine’s torque on the main rotor. When the engine turns the main rotor, the fuselage would tend to spin in the opposite direction. The tail rotor pushes air to the side at the tail, generating a horizontal force that twists the helicopter the other way, canceling that reaction. You adjust how much anti-torque is needed with the pedals, which change the tail rotor thrust. Increasing main rotor power would increase the torque you have to counter, making the problem worse; elevating the helicopter or using rudder alone doesn’t provide the required counter-torque in hover or low-speed flight. So, tail rotor thrust is the mechanism that achieves counter-torque.