What system allows for the quick stopping of the main rotor after the engines are shut down?

• A. Tail Rotor System
• B. Rotor Brake
• C. Transmission Control
• D. Flight Control System

Answer: (B)

The rotor brake is the system designed specifically to enable the rapid stopping of the main rotor after the engines have been shut down. This is crucial for various operational scenarios, such as when the helicopter needs to be secured on the ground or when preparing for maintenance. By applying the rotor brake, the pilot can bring the rotor blades to a halt quickly and efficiently, improving safety and preventing any potential hazards associated with a spinning rotor, such as accidents or injuries during ground operations.

The other systems mentioned do not serve this specific function. The tail rotor system primarily provides directional control for the helicopter during flight. The transmission control is involved in managing the power transfer from the engines to the rotor system but does not facilitate stopping the rotor quickly. The flight control system focuses on aiding in maneuvering the helicopter during flight, not on stopping the rotor post engine shutdown. Thus, the rotor brake is the only system dedicated to this particular purpose.