What is True Airspeed (TAS)?

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Multiple Choice

What is True Airspeed (TAS)?

True Airspeed is the actual speed of the airplane through the air, i.e., its velocity relative to the surrounding air mass. Because air density changes with altitude, the same motion through space corresponds to different speeds through the air as you climb; thinner air means you must move faster through the air to maintain the same dynamic pressure and true speed. The other terms describe what the cockpit instruments show or correct for, not the actual speed through the air: Indicated Airspeed is the raw instrument reading based on dynamic pressure; Calibrated Airspeed corrects that reading for instrument errors; Equivalent Airspeed corrects for compressibility effects. So TAS specifically refers to the real speed through the air and its change with altitude and density.

True Airspeed is the actual speed of the airplane through the air, i.e., its velocity relative to the surrounding air mass. Because air density changes with altitude, the same motion through space corresponds to different speeds through the air as you climb; thinner air means you must move faster through the air to maintain the same dynamic pressure and true speed. The other terms describe what the cockpit instruments show or correct for, not the actual speed through the air: Indicated Airspeed is the raw instrument reading based on dynamic pressure; Calibrated Airspeed corrects that reading for instrument errors; Equivalent Airspeed corrects for compressibility effects. So TAS specifically refers to the real speed through the air and its change with altitude and density.

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