Equivalent airspeed - 14 CFR 1.1
Tags: 14 CFR 1.1, FAA, Regulatory
Equivalent airspeed means the calibrated airspeed of an aircraft corrected for adiabatic compressible flow for the particular altitude.
Equivalent airspeed (EAS) is the airspeed at sea level which represents the same dynamic pressure as that flying at the true airspeed (TAS) at altitude.[1][2] It is useful for predicting aircraft handling, aerodynamic loads, stalling etc.
Equivalent Airspeed, EAS
Equivalent Airspeed Correction chart
Air is assumed to be incompressible, up to about 200 KIAS and in the lower atmosphere (below 5000ft). Above that the altimeter over reads (air is starting to compress) by 1/2 knot.
Equivalent airspeed. Airspeed equivalent to CAS in standard atmosphere at sea level. As the airspeed and pressure altitude increase, the CAS becomes higher than it should be, and a correction for compression must be subtracted from the CAS.
EQUIVALENT AIRSPEED (EAS) is calibrated airspeed (CAS) corrected for compression of air in the pitot tube (same as CAS in standard atmosphere at sea level; less than CAS at higher altitudes and faster airspeeds).
Equivalent Airspeed is the speed at which the aircraft would currently be flying if it were at sea level. Airspeeds between sea level and other elevations vary greatly due to the different air pressures of the two altitudes.
EAS - equivalent airspeed.
EAT - estimated (or expected) approach time.
EBAA - European Business Aircraft Association.
TRUE AIRSPEED
the airspeed of an aircraft relative to undisturbed air. True airspeed is equal to equivalent airspeed multiplied by (0/)1/2.
TRUE AIRSPEED (TAS)
The airspeed of an aircraft relative to undisturbed air.
 See also: Aircraft, Airspeed, Altitude, Navigation, Speed
  
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