Tecnam P2010 - Page 19

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Section 1 – General
ACRONYMS AND TERMINOLOGY
2
nd
Edition, Rev.0
9. ACRONYMS AND TERMINOLOGY
KCAS
Calibrated Airspeed is the indicated airspeed expressed in knots,
corrected taking into account the errors related to the instrument
itself and its installation.
KIAS
Indicated Airspeed is the speed shown on the airspeed indicator
and it is expressed in knots.
KTAS
True Airspeed is the KCAS airspeed corrected taking into ac-
count altitude and temperature.
V
A
Design Manoeuvring speed is the speed above the which it is not
allowed to make full or abrupt control movement.
V
FE
Maximum Flap Extended speed is the highest speed permissible
with flaps extended.
V
NO
Maximum Structural Cruising Speed is the speed that should not
be exceeded, except in smooth air and only with caution.
V
NE
Never Exceed Speed is the speed limit that may not be exceeded
at any time.
V
O
Operating Manoeuvring speed is the speed above the which it is
not allowed to make full or abrupt control movement
V
S
Stall Speed.
V
S0
Stall Speed in landing configuration (flaps and landing gear ex-
tended).
V
S1
Stall speed in clean configuration (flaps 0°).
V
X
Best Angle-of-Climb Speed is the speed which results in the
greatest gain of altitude with respect to a given horizontal dis-
tance.
V
Y
Best Rate-of-Climb Speed is the speed which results in the great-
est gain in altitude in a given time.
V
R
Rotation speed: is the speed at which the aircraft rotates about
the pitch axis during takeoff
V
LOF
Lift off speed: is the speed at which the aircraft generally lifts off
from the ground.
V
obs
Obstacle speed: is the speed at which the aircraft flies over a 15m
obstacle during takeoff or landing.