The tail rotor lift percentage is approximately

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Multiple Choice

The tail rotor lift percentage is approximately

The tail rotor’s job is to counter the main rotor’s reaction torque, not to contribute significantly to lift. Since the main rotor does most of the lifting, only a small amount of thrust from the tail rotor is needed to keep the helicopter from yawing. In typical UH-60 operations, that anti-torque requirement is a small fraction of the main rotor’s lift, about 2.5%. So the tail rotor lift being around 2.5% of the main rotor lift best reflects how little is needed to balance torque while the main rotor does the heavy lifting. Options suggesting much less or much more anti-torque thrust would not match how the aircraft actually distributes lift and torque during hover and low-speed flight.

The tail rotor’s job is to counter the main rotor’s reaction torque, not to contribute significantly to lift. Since the main rotor does most of the lifting, only a small amount of thrust from the tail rotor is needed to keep the helicopter from yawing. In typical UH-60 operations, that anti-torque requirement is a small fraction of the main rotor’s lift, about 2.5%. So the tail rotor lift being around 2.5% of the main rotor lift best reflects how little is needed to balance torque while the main rotor does the heavy lifting. Options suggesting much less or much more anti-torque thrust would not match how the aircraft actually distributes lift and torque during hover and low-speed flight.

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