Lancair Legacy, Pilot'S Operating Handbook And Flight Manual

Page: 16 / 188

I-10 February 2008
Legacy
I-11 February 2008
Legacy
GENERAL AIRSPEED TERMINOLOGY AND
SYMBOLS
CAS Calibrated Airspeed is the indicated speed of an airplane, corrected
for “position error” and instrument error. Calibrated airspeed is equal
to true airspeed in standard atmosphere at sea level.
GS Ground Speed is the speed of an airplane relative to the ground.
IAS Indicated Air Speed is the speed of an airplane as shown on the air-
speed indicator. IAS values published in this handbook assume zero
instrument error.
KCAS Calibrated Airspeed expressed in “knots”.
KIAS Indicated Airspeed expressed in “knots”.
TAS True Airspeed is the airspeed relative to undisturbed air which is the
CAS corrected for altitude and temperature.
V
A
Maneuvering Speed is the maximum speed at which application of
full available aerodynamic control will not overstress the airplane.
V
FE
Maximum Flap Extend Speed is the highest speed permissible with
wing flaps in a prescribed extended position.
V
LE
Maximum Landing Gear Extended Speed is the maximum speed at
which an airplane can be safely flown with the landing gear extended.
V
LO
Maximum Landing Gear Operating Speed is the maximum speed at
which the landing gear can be safely extended or retracted.
V
NE
Never Exceed Speed is the speed limit that may not be exceeded at
any time.
V
NO
/V
C
Maximum Structural Cruising Speed is the speed that should not be
exceeded except in smooth air and then only with caution.
V
S
Stalling Speed or the minimum steady flight speed at which the air-
plane is controllable.
V
SO
Stalling Speed or the minimum steady flight speed at which the air-
plane is controllable in the landing configuration.
V
X
Best Angle-of-Climb Speed is the airspeed which delivers the greatest
gain of altitude in the shortest possible horizontal distance.