Question id 150 - Aircraft General Knowledge - PPL(H) - Private Pilot License

Limits blade flapping and prevents rotor blade stall.
Reduces the risk of rotor blade contact with the tail boom at low rotor RPM.
Decreases the bending and tensional loads on the rotor blades in all flight conditions.
Decreases the bending and tensional loads on the rotor blades in all flight conditions.