Lifting System Practice Exam

The component that changes the power flow from the main transmission to the tail rotor gearbox is the 50 degree intermediate gearbox. This gearbox plays a crucial role in redirecting the power generated by the main transmission to the tail rotor, which is essential for countering the torque produced by the main rotor and maintaining stability during flight.

The 50 degree intermediate gearbox is specifically designed to handle the angular change needed for transferring power effectively from a horizontal shaft (from the main transmission) to a vertical shaft that drives the tail rotor. This functionality ensures efficient power transmission and helps in achieving the desired rotor speeds for proper tail rotor operation.

While other components like the gear drive assembly, tail rotor coupling, and transmission output shaft all play important roles within the lifting system, they either support different functions in the power transmission system or facilitate the connection between the main transmission and other parts, but do not specifically manage the redirection of power to the tail rotor gearbox as the intermediate gearbox does.