C
IRRUS
D
ESIGN
S
ECTION
1: G
ENERAL
SR20
T
HE
A
IRPLANE
P/N 11934-005
1-9
Terminology
Table 1:
General Airspeed Terminology
General Airspeed Terminology
Terminology
Definition
KCAS
Knots Calibrated Airspeed is the indicated airspeed
corrected for position and instrument error. Calibrated
airspeed is equal to true airspeed in standard
atmosphere at sea level.
KIAS
Knots Indicated Airspeed is the speed shown on the
airspeed indicator. The IAS values published in this
handbook assume no instrument error.
KTAS
Knots True Airspeed is the airspeed expressed in knots
relative to undisturbed air which is KCAS corrected for
altitude and temperature.
V
G
Best Glide Speed is the speed at which the greatest flight
distance is attained per unit of altitude lost with power
off.
V
O
Operating Maneuvering Speed is the maximum speed at
which application of full control movement will not
overstress the airplane.
V
FE
Maximum Flap Extended Speed is the highest speed
permissible with wing flaps in a prescribed extended
position.
V
NO
Maximum Structural Cruising Speed is the speed that
should not be exceeded except in smooth air, and then
only with caution.
V
NE
Never Exceed Speed is the speed that may not be
exceeded at any time.
V
PD
Maximum Demonstrated Parachute Deployment Speed
is the maximum speed at which parachute deployment
has been demonstrated.
V
S
Stalling Speed is the minimum steady flight speed at
which the aircraft is controllable.
Reissue A