How does the tail rotor function in a rotary wing aircraft?

The tail rotor in a rotary wing aircraft plays a crucial role in stabilizing the helicopter by countering the torque produced by the main rotor. When the main rotor spins, it generates a reactive force that tends to rotate the helicopter's fuselage in the opposite direction. This is due to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.

To maintain control and keep the helicopter stable, the tail rotor generates thrust in the opposite direction to the torque. By adjusting the pitch of the tail rotor blades, the pilot can control the amount of thrust produced, allowing for precise handling and directional stability. This function is essential for the helicopter's ability to hover, take off, and navigate effectively, making it a vital component of rotary wing aircraft operation.

The other choices, while related to the operation of a helicopter, do not accurately describe the specific purpose of the tail rotor in terms of managing torque. Lift generation is primarily the role of the main rotor, while forward thrust is also a function of the main rotor during flight. Transmitting shaft horsepower is more related to the engine and drive system rather than the specific control and stabilization task that the tail rotor performs. Thus, the function of overcoming the