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Fly the Airplane

Plane and Pilot

It was the evening of June 1, 2009, and Flight 447, a 4-year-old Airbus 330, was serenely cruising just below the equator at FL 360. Suddenly, one of the Airbus three redundant pitot tubes clogged with ice crystals.

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Airspeed and Altitude Control Simplified: Tips for Stable Flying

Pilot Institute

It works by reading the difference between static pressure and total pressure from air flowing into a pitot tube. You can use a flight computer like an E6B or onboard avionics to determine your true airspeed. For equivalent airspeed, you can rely on flight computers or specific charts in your Aircraft Flight Manual.