What indicates the stabilator uses pitch rate information to control the Stabilator?

What indicates the stabilator uses pitch rate information to control the Stabilator?

• A. EGIs
• B. GPS
• C. Radar Altimeter
• D. VSI

Answer: (A)

Pitch rate information tells the stabilator how quickly the helicopter’s nose is moving, so the control system can command the stabilator to deflect and damp that movement. The source that provides this pitch-rate data to the stabilator system is the Embedded GPS/Inertial (EGI) system, which includes inertial sensors that measure angular rates like pitch rate and feed them to the flight control computers. GPS mainly gives position and velocity, not the instantaneous rate of pitch. A radar altimeter measures height above ground, not pitch motion. The VSI (vertical speed indicator) shows rate of climb or descent, not angular rate. Because only the EGI supplies the necessary pitch-rate information for stabilator control, it’s the data source that indicates the stabilator uses pitch rate information.

Pitch rate information tells the stabilator how quickly the helicopter’s nose is moving, so the control system can command the stabilator to deflect and damp that movement. The source that provides this pitch-rate data to the stabilator system is the Embedded GPS/Inertial (EGI) system, which includes inertial sensors that measure angular rates like pitch rate and feed them to the flight control computers.

GPS mainly gives position and velocity, not the instantaneous rate of pitch. A radar altimeter measures height above ground, not pitch motion. The VSI (vertical speed indicator) shows rate of climb or descent, not angular rate. Because only the EGI supplies the necessary pitch-rate information for stabilator control, it’s the data source that indicates the stabilator uses pitch rate information.