www.faaflighttraining.com presents Airspeeds
CAS:
Calibrated Airspeed = Indicated airspeed corrected for installation and
instrument errors. CAS equals TAS at standard atmospheric conditions (ISA) at
MSL Mean Sea Level.
GS: Ground
Speed. Speed of the airplane relative to the ground.
IAS:
Indicated Airspeed as shown on an airspeed indicator.
KCAS: CAS
indicated in Knots.
KIAS IAS
indicated in Knots.
TAS: True
Airspeed. The speed of the airplane relative to the air.
TAS is CAS
corrected for errors due to altitude and temperature.
VA: Maneuvering Speed. Maximum speed at which the airplane is not
overstressed at full deflection of control surfaces. Full or abrupt control
surface movement is not permissible above this speed.
VFE: Maximum flaps extended speed. This speed must not be exceeded in any
operation.
VNO: Maximum structural operating speed. This speed may be exceeded only
in smooth air, and with caution.
VR: Rotation speed or takeoff speed.
VREF: Reference Speed
VS: The power-off stall speed with the airplane in its standard
configuration.
VSO: The power-off stall speed with the airplane in landing
configuration.
VX: Best Angle of climb speed.
VY: Bets rate of climb speed.