Which three cockpit instruments utilize gyroscopes?

Which three cockpit instruments utilize gyroscopes?

• A. Attitude Indicator, Heading Indicator, Turn Coordinator
• B. Vertical Speed Indicator, Altimeter, Airspeed Indicator
• C. Airspeed Indicator, Altimeter, Attitude Indicator
• D. Turn Coordinator, Altimeter, Hygrometer

Answer: (A)

Gyroscopes provide a stable reference for orientation in flight instruments. Three cockpit instruments rely on gyros: the Attitude Indicator, the Heading Indicator, and the Turn Coordinator. The Attitude Indicator uses a gyroscope to keep the artificial horizon steady, showing the aircraft’s pitch and bank relative to the horizon. The Heading Indicator uses a directional gyro to present a stable heading, though it can drift and needs periodic recalibration. The Turn Coordinator uses a gyroscope mounted at a slight angle to sense turn rate (and roll rate), giving a quick visual of how fast the aircraft is turning. The other indicators—Vertical Speed Indicator, Altimeter, and Airspeed Indicator—work from pressure measurements (airflow and static/pitot pressure) and do not use gyroscopes. The Hygrometer measures humidity, also not gyroscopic.

Gyroscopes provide a stable reference for orientation in flight instruments. Three cockpit instruments rely on gyros: the Attitude Indicator, the Heading Indicator, and the Turn Coordinator. The Attitude Indicator uses a gyroscope to keep the artificial horizon steady, showing the aircraft’s pitch and bank relative to the horizon. The Heading Indicator uses a directional gyro to present a stable heading, though it can drift and needs periodic recalibration. The Turn Coordinator uses a gyroscope mounted at a slight angle to sense turn rate (and roll rate), giving a quick visual of how fast the aircraft is turning. The other indicators—Vertical Speed Indicator, Altimeter, and Airspeed Indicator—work from pressure measurements (airflow and static/pitot pressure) and do not use gyroscopes. The Hygrometer measures humidity, also not gyroscopic.