How are the Yaw Dampers actuated?

• A. Electrically
• B. Hydraulically
• C. Pneumatically
• D. Manually

Answer: (A)

Yaw dampers are stability augmentation devices that automatically apply small rudder inputs to damp yaw motions and Dutch roll. In the CRJ-550, the damper commands are carried out by electric actuators that move the rudder surface in response to signals from the yaw damper computer. This electric actuation provides precise, rapid movements and integrates with the aircraft’s electronic flight control systems, without relying on manual input. Hydraulic or pneumatic actuation would require different plumbing and power arrangements, and manual operation isn’t used for this automatic stabilization function. So the yaw dampers are actuated electrically.