Which component is the Main Rotor Blade?

• A. Main Rotor Head
• B. Main Transmission
• C. Rotor Brake System
• D. Main Rotor Blade

Answer: (D)

The main rotor blade is the actual lift-generating surface that sweeps through the air as the rotor spins. It’s the long, wing-like component attached to the rotor head and pitched to control lift. The rotor head, by contrast, is the hub that holds the blades and provides attachment and pitch-changing movement; the main transmission powers the rotor system by transmitting engine power to the rotor; and the rotor brake system is used to stop the rotor when the helicopter is on the ground. So the blade itself is the Main Rotor Blade.