The air data computer receives data from which source to compute air data for displays and flight computers?

The air data computer receives data from which source to compute air data for displays and flight computers?

• A. Pitot/static pressures.
• B. GPS data.
• C. Cabin pressure sensors.
• D. Fuel flow sensors.

Answer: (A)

Air data calculations come from the pitot-static system. The air data computer uses the ambient static pressure from the static ports and the stagnation (pitot) pressure from the pitot tube to determine dynamic pressure and calibrate airspeed, altitude, and related parameters. Some systems also incorporate a total air temperature input to refine true airspeed calculations. These computed values are then shown on displays and used by flight computers for control laws. GPS, cabin pressure sensors, and fuel flow sensors don’t provide the pressure data needed for these air data calculations.

Air data calculations come from the pitot-static system. The air data computer uses the ambient static pressure from the static ports and the stagnation (pitot) pressure from the pitot tube to determine dynamic pressure and calibrate airspeed, altitude, and related parameters. Some systems also incorporate a total air temperature input to refine true airspeed calculations. These computed values are then shown on displays and used by flight computers for control laws. GPS, cabin pressure sensors, and fuel flow sensors don’t provide the pressure data needed for these air data calculations.