Which instrument is not a pitot-static instrument?

Which instrument is not a pitot-static instrument?

• A. Airspeed Indicator
• B. Attitude Indicator
• C. Altimeter
• D. Vertical Speed Indicator

Answer: (B)

The pitot-static system provides the air data used by three instruments: airspeed, altitude, and vertical speed. The airspeed indicator measures dynamic pressure from the pitot tube and compares it to static pressure to show speed. The altimeter uses static pressure to indicate altitude. The vertical speed indicator tracks how quickly static pressure is changing to show rate of climb or descent. The Attitude Indicator, however, relies on a gyroscope to display the aircraft’s orientation (pitch and bank) relative to the horizon, not on air pressure data. Because it does not use pitot-static information, it is not a pitot-static instrument.

The pitot-static system provides the air data used by three instruments: airspeed, altitude, and vertical speed. The airspeed indicator measures dynamic pressure from the pitot tube and compares it to static pressure to show speed. The altimeter uses static pressure to indicate altitude. The vertical speed indicator tracks how quickly static pressure is changing to show rate of climb or descent. The Attitude Indicator, however, relies on a gyroscope to display the aircraft’s orientation (pitch and bank) relative to the horizon, not on air pressure data. Because it does not use pitot-static information, it is not a pitot-static instrument.