What are the three sources of power used to drive a gyroscopic turn indicator?

What are the three sources of power used to drive a gyroscopic turn indicator?

• A. Hydraulic
• B. Electric, Vacuum, Pressure Air
• C. Solar and Wind
• D. Nuclear and Magnetic

Answer: (B)

Powering a gyroscopic turn indicator comes from one of three drives: electric, vacuum, or compressed air. The gyro’s rotor must be kept spinning to stay stable, and each of these methods provides that torque: an electric motor tied to the aircraft’s electrical system (or standby battery), a engine-driven vacuum pump that creates suction to drive the gyro, or a pneumatic setup that uses bleed or compressor air to turn the gyro via an air turbine. These three approaches cover the common ways gyros are driven in aircraft, ensuring the instrument can reliably show the rate of turn. Hydraulic, solar, wind, nuclear, or magnetic sources aren’t used to drive gyros in standard aircraft turn indicators.

Powering a gyroscopic turn indicator comes from one of three drives: electric, vacuum, or compressed air. The gyro’s rotor must be kept spinning to stay stable, and each of these methods provides that torque: an electric motor tied to the aircraft’s electrical system (or standby battery), a engine-driven vacuum pump that creates suction to drive the gyro, or a pneumatic setup that uses bleed or compressor air to turn the gyro via an air turbine. These three approaches cover the common ways gyros are driven in aircraft, ensuring the instrument can reliably show the rate of turn. Hydraulic, solar, wind, nuclear, or magnetic sources aren’t used to drive gyros in standard aircraft turn indicators.