Dynamic stability is provided by which system?

Dynamic stability is provided by which system?

• A. SAS
• B. Stability Augmentation Switch
• C. Autopilot
• D. Trim

Answer: (A)

Dynamic stability is about the aircraft damping out disturbances and returning smoothly to steady flight after a gust or a control input. The Stability Augmentation System provides automatic damping by sensing the helicopter’s motion and quickly applying small corrective inputs to oppose unwanted motion in pitch, roll, and yaw. This makes the helicopter less prone to oscillations and easier to control, especially in turbulent conditions or during aggressive maneuvers. The stability augmentation switch simply turns this capability on or off, but the system itself is what adds the damping. Autopilot can also stabilize the aircraft, but its purpose is broader—controlling attitude or flight path—whereas dynamic stability in this context refers to the automatic dampening function provided by SAS. Trim, on the other hand, biases control inputs to ease pilot workload but does not affect the dynamic damping of the aircraft’s response.

Dynamic stability is about the aircraft damping out disturbances and returning smoothly to steady flight after a gust or a control input. The Stability Augmentation System provides automatic damping by sensing the helicopter’s motion and quickly applying small corrective inputs to oppose unwanted motion in pitch, roll, and yaw. This makes the helicopter less prone to oscillations and easier to control, especially in turbulent conditions or during aggressive maneuvers.

The stability augmentation switch simply turns this capability on or off, but the system itself is what adds the damping. Autopilot can also stabilize the aircraft, but its purpose is broader—controlling attitude or flight path—whereas dynamic stability in this context refers to the automatic dampening function provided by SAS. Trim, on the other hand, biases control inputs to ease pilot workload but does not affect the dynamic damping of the aircraft’s response.