Tecnam P-Mentor - Page 25

1
st
Edition - Rev. 0
Section 1 – GENERAL
ACRONYMS AND TERMINOLOGY
P-Mentor – Aircraft Flight Manual Page 1 - 9
9. Acronyms and Terminology
9.1. Velocity 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 account
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. Operating a
t
or below
manoeuvring speed does not provide structural
protection against multiple full control inputs in one axis or full
control inputs in more than one axis at the same time.
V
S
Stall Speed is the minimum steady flight speed for a specific flaps
configuration and power setting.
V
S0
Stall Speed in landing configuration (flaps fully extended).
V
X
Best Angle-of-Climb Speed is the speed which results in the
greatest gain of altitude with respect to a given horizontal distance.
V
Y
Best Rate-of-Climb Speed is the speed which results in the
greatest gain in altitude in a given time.
V
R
Rotation speed: is the speed at which the aircraft rotates about the
pitch axis during take-off.
V
REF
Reference Speed is the reference speed for the approach during
landing phase.
V
50ft
Obstacle speed (screen speed, V
50ft
): is the speed at which the
aircraft flies over a 15m (50 ft) obstacle during take-off or landing.
V
GLIDE
Glide speed: is the speed of maximum efficiency (to fly the longest
distance per unit of altitude lost)