indicated air speed


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Related to indicated air speed: Calibrated airspeed, Equivalent airspeed, True airspeed

indicated air speed (IAS)

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 ¼ρV2, where ρ is density and V is true air speed. Also called air speed. See airspeed indicator.
References in periodicals archive ?
Our speed was about 150 knots indicated air speed. His attempt to clear the window just smeared the bug guts around and almost broke his arm.