Which of the following is a characteristic of the UH-60M rotor system?

• A. articulated rotor system
• B. rotor brake
• C. wide chord blades
• D. all of the above

Answer: (D)

The UH-60M rotor system includes three features that directly affect lift, control, and ground handling. It uses a four-blade fully articulated main rotor, which means each blade can flap, lead-lag, and change pitch independently to maintain stability and smooth response in all flight regimes. It also includes a rotor brake, a mechanical device in the gear box that lets the rotor be stopped quickly after shutdown and held during maintenance for safety. In addition, the blades themselves have a wider chord, which increases lift and rotor efficiency, improving hover performance and heavy-load handling without needing to raise rotor speed excessively. Put together, these characteristics are all part of the UH-60M rotor system, so all of the above is correct.