- true air speed
- The actual speed of an aircraft relative to the air through which it flies (i.e., the calibrated air speed corrected for temperature, density, and compressibility). If the compressibility effects are ignored, then the IAS equals the product of the TAS and the square root of the relative density. Similarly, the TAS is related to the Mach number by the square root of the relative temperature.True airspeedRelationship between IAS and TAS at various heights.
Aviation dictionary. 2014.
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True air speed — Die True Airspeed (TAS) ist die wahre Geschwindigkeit eines Flugzeuges gegenüber der umgebenden Luft. Durch ein Staurohr am vorderen Flugzeugrumpf (bei Kleinflugzeugen meist unter der Flügelvorderkante) wird am Fahrtmesser (engl. Airspeed… … Deutsch Wikipedia
air( )speed — The speed of an aircraft relative to its surrounding air mass. The term air speed can mean any one of the following: indicated air speed, calibrated air speed, equivalent air speed, and true air speed. Indicated air speed (indicated air speed) or … Aviation dictionary
indicated air speed — The uncorrected reading of the air speed indicator. It is calibrated to reflect standard atmospheric adiabatic compressible flow at sea level uncorrected for air speed system errors. It is equal to 1/2 ρV2 , where ρ is density and V is true air… … Aviation dictionary
rectified air speed — The indicated air speed corrected for instrument and installation (pressure/position) errors. At mean sea level in the international standard atmosphere (ISA), the RAS will be equal to true air speed. Also known as calibrated air speed (CAS) … Aviation dictionary
calibrated air speed — An indicated air speed corrected for instrument and installation (pressure/position) errors. At mean sea level in the ISA (international standard atmosphere), the CAS is equal to true air speed … Aviation dictionary
True airspeed — (TAS) is the speed of an aircraft relative to the airmass in which it flies, i.e. the magnitude of the vector difference of the velocity of the aircraft and the velocity of the air. Under zero wind conditions and in horizontal flight, this is… … Wikipedia
air data computer — An electronic digital computer in aircraft that senses or computes static and pitot pressure, outside air and total air temperature, IAS (indicated air speed), TAS (true air speed), pressure altitude, Mach number, angle of attack, and angle of… … Aviation dictionary
speed lock — An autopilot mode in which the TAS (true air speed), or in some cases the ground speed, is held constant … Aviation dictionary
air distance — A distance measured relative to the mass of air through which an aircraft passes. The no wind distance flown in a given time. It is equal to the product of true air speed (TAS) and time. Also, it considers the distance increase caused by the… … Aviation dictionary
Air France Flight 447 — F GZCP, the aircraft involved in the accident Accident summary Date 1 June 2009 … Wikipedia