What does the Elastomeric Bearing do?

What does the Elastomeric Bearing do?

• A. Increases rotor speed
• B. Powers the hydraulic system
• C. Restricts lead, lag, and flapping of the main rotor disc
• D. Stabilizes the tail rotor clutch

Answer: (C)

The elastomeric bearing provides a flexible, damped interface between the rotor hub and the mast, allowing loads to be transmitted while limiting unintended motion. This damping and stiffness specifically restrain the blade’s lead-lag and flapping movements, helping to keep the rotor disc stable and reduce vibration transmitted into the airframe. It doesn’t increase rotor speed, power hydraulic systems, or directly affect the tail rotor clutch—the main role is controlling rotor dynamics and damping motions of the main rotor.

The elastomeric bearing provides a flexible, damped interface between the rotor hub and the mast, allowing loads to be transmitted while limiting unintended motion. This damping and stiffness specifically restrain the blade’s lead-lag and flapping movements, helping to keep the rotor disc stable and reduce vibration transmitted into the airframe. It doesn’t increase rotor speed, power hydraulic systems, or directly affect the tail rotor clutch—the main role is controlling rotor dynamics and damping motions of the main rotor.