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airspeed indicator

noun, Aeronautics
1.
a flight instrument showing the airspeed of an aircraft.
Abbreviation: ASI.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for airspeed indicator
  • Many of these speeds are also marked on the instrument panel, some operating controls, and the airspeed indicator.
  • Slowly at first, the airspeed indicator comes off the peg.
  • The airspeed could not be determined because of the destruction of the airspeed indicator.
Encyclopedia Article for airspeed indicator

instrument that measures the speed of an aircraft relative to the surrounding air, using the differential between the pressure of still air (static pressure) and that of moving air compressed by the craft's forward motion (ram pressure); as speed increases, the difference between these pressures increases as well.

Learn more about airspeed indicator with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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