What does SAS stand for and what is its function?

What does SAS stand for and what is its function?

• A. Speed Adjustment System, controls rotor speed
• B. Stability Augmentation System, acts as autopilot providing added stability in pitch and roll axes
• C. Sensor Analysis System, monitors flight parameters
• D. Structural Alignment System, ensures airframe alignment

Answer: (B)

Stability Augmentation System provides automatic stabilization in the aircraft’s pitch and roll axes. It uses sensors to detect unwanted motion and actuators to nudge the control surfaces, dampening oscillations and keeping the aircraft steadier with less pilot effort. This is different from autopilot, which commands a specific attitude or flight path; SAS mainly stabilizes around the current attitude and can be used alongside autopilot for more control. The other names describe different concepts—changing rotor speed, monitoring flight parameters, or ensuring airframe alignment—so they don’t match the function of SAS.

Stability Augmentation System provides automatic stabilization in the aircraft’s pitch and roll axes. It uses sensors to detect unwanted motion and actuators to nudge the control surfaces, dampening oscillations and keeping the aircraft steadier with less pilot effort. This is different from autopilot, which commands a specific attitude or flight path; SAS mainly stabilizes around the current attitude and can be used alongside autopilot for more control. The other names describe different concepts—changing rotor speed, monitoring flight parameters, or ensuring airframe alignment—so they don’t match the function of SAS.