User manual

Page 17
Aircraft Operation Manual
Piper Cheyenne I, IA, II, IIXL
For ight simulation use only
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 undi-
sturbed air which is the CAS corrected for altitude, temperatu-
re and compressibility.
V
A
Maneuvering Speed is the maximum speed at which applicati-
on of full available aerodynamic control will not overstress the
airplane.
V
FE
Maximum Flap Extended Speed is the highest speed permissib-
le with wing aps in a prescribed, extended position.