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How It Works: Yaw Damper

A) The soul of a yaw damper rests with rudder servos, accelerometers and rate sensors, often located in the tail of the airplane. B) In most aircraft, the yaw damper sensors are constantly talking back and forth to the primary onboard reference system, such as the ADAHRS. C) The yaw damper on some aircraft turns on and off automatically, making it one more thing the PIC need not worry about forgetting. Illustration by Tim Barker
Gemini Sparkle

Key Takeaways:

  • A yaw damper automatically stabilizes an aircraft's movement around its vertical axis by applying precise rudder inputs, effectively smoothing out fishtailing and inhibiting Dutch roll, a wallowing combination of yawing and rolling.
  • Using sensors and avionics, the system ensures coordinated turns and a more comfortable ride, often engaging automatically above specific altitudes in modern aircraft while providing envelope protection.
  • While beneficial for stability, yaw dampers are often pilot-selectable or disengaged during critical phases like takeoff or landing in certain aircraft to prevent interference with pilot control or the identification of powerplant failures.
  • Pilots flying aircraft with yaw dampers may become accustomed to not using rudder pedals for turns, leading to a need for reacquaintance with manual rudder input when transitioning to aircraft without the system.
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In its most basic form, a yaw damper inhibits movement of an aircraft around its vertical axis, performing like an automated set of feet on the rudder pedals.

Rob Mark

Rob Mark is an award-winning journalist, business jet pilot, flight instructor, and blogger.

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