1-8 P/N 13999-002 Info Manual
Section 1 Cirrus Design
General SR20
Symbols, Abbreviations and Terminology
General Airspeed Terminology and Symbols
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 minimum steady flight speed at which the
aircraft is controllable.
V
S
50%
Stalling Speed is minimum steady flight speed at which the
aircraft is controllable with 50% flaps.
September 2011
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