What system measures and indicates any bending moments occurring on the rotor mast?

• A. Rotor tachometer
• B. Mast Moment Indicator
• C. Vibration sensor
• D. Torque indicator

Answer: (B)

The Mast Moment Indicator is essential for measuring and indicating any bending moments occurring on the rotor mast. This system plays a crucial role in monitoring the structural integrity and performance of the rotor system by providing real-time data about the loads experienced by the rotor mast during operation. By detecting bending moments, it helps ensure that the rotor mast remains within safe operational limits, preventing structural failures that could arise from excessive stress.

This system primarily aids pilots and maintenance personnel in understanding how external factors such as wind gusts, maneuvers, and load changes can impact the rotor mast's stability. It provides invaluable information that contributes to safe operational practices and maintenance decisions for the aircraft. Hence, the critical function of the Mast Moment Indicator is to enhance safety and reliability in aviation operations by continuously monitoring the forces acting on the rotor mast.