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This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
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Air_speed entered the ranking for the first time today at position #. This is its highest position ever recorded.
This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-04-27 and was most recently seen on 2026-04-27.
In aviation, airspeed is the speed of an aircraft relative to the air it is flying through. In contrast, the ground speed is the speed of an aircraft with respect to the surface of the Earth. It is difficult to measure the exact airspeed of the aircraft, but other measures of airspeed, such as indicated airspeed and Mach number give useful information about the capabilities and limitations of airplane performance. The common measures of airspeed are:Indicated airspeed (IAS), what is read on an airspeed gauge connected to a pitot-static system.
Calibrated airspeed (CAS), indicated airspeed adjusted for pitot system position and installation error.
True airspeed (TAS) is the actual speed the airplane is moving through the air. When combined with aircraft direction, wind speed and direction, it can be used to calculate ground speed and direction.
Equivalent airspeed (EAS) is true airspeed times root density ratio. It is a useful way of calculating aerodynamic loads and airplane performance at low speeds when the flow can be considered incompressible.
Mach number is a measure of how fast the airplane is flying relative to the speed of sound.
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