User manual

18 19
18 19
Abbrevations and Terminology
(a) General Airspeed Terminology
CAS Calibrated Airspeed means the indicated speed of an aircraft,
corrected for position and instrument error. Calibrated Air-
speed is equal to true airspeed in standard atmosphere at sea
level.
KCAS Calibrated Airspeed expressed in „Knots“.
GS Ground Speed is the speed of an airplane relative to the
ground.
IAS Indicated Airspeed is the speed of an aircraft as shown on
the airspeed indicator when corrected for instrument error.
IAS values published in this manual assume zero instrument
error.
KIAS Indicated Airspeed, expressed in „Knots“.
M Mach Speed (Mach Number) is the ratio of true airspeed to
the speed of sound.
TAS True Airspeed is the airspeed of an airplane relative to undis-
turbed air which is the CAS corrected for altitude, tempera-
ture and compressibility.
V
A
Maneuvering Speed is the maximum speed at which applica-
tion of full available aerodynamic control will not overstress
the airplane.
V
FE
Maximum Flap Extended Speed is the highest speed permis-
sible with wing flaps in a prescribed, extended position.
V
LE
Maximum Landing Gear Extended Speedis the maximum
speed at which an aircraft can be safely flown with the lan-
ding gear extended.