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PILOT'S OPERATING HANDBOOK
1.4 - ABBREVIATIONS AND TERMINOLOGY
METEOROLOGICAL TERMINOLOGY
ISA
:
International standard atmosphere
OAT
:
Outside air temperature
SAT
:
Static air temperature
QFE
:
Atmospheric pressure at the airport reference point.
QNH
:
Atmospheric pressure at sea level, at airplane position.
On the ground, the altimeter will indicate "zero" if it is set to QFE ; it will indicate airport
Standard Temperature :
Is 15°C
Pressure altitude :
Is the altitude read from an altimeter when the altimeter's barometric scale has been set to
29.92 inches of mercury (1013.2 hPa).
GENERAL AIRSPEED TERMINOLOGY AND SYMBOLS
KCAS
:
Knots Calibrated Airspeed is the indicated airspeed expressed in knots corrected for position
and instrument error. Knots calibrated airspeed is equal to KTAS in standard atmosphere at sea
level.
KIAS
:
Knots Indicated Airspeed is the speed shown on the airspeed indicator and expressed in knots.
KTAS
:
Knots True Airspeed is the airspeed expressed in knots relative to undisturbed air which is KCAS
corrected for altitude and temperature.
V
:
Maneuvering Speed is the maximum speed at which full or abrupt control movements may be
A
used.
V
:
Maximum Flap Extended Speed is the highest speed permissible with wing flaps in a prescribed
FE
extended position.
V
:
Maximum Landing Gear Extended Speed is the maximum speed at which an airplane can be
LE
safely flown with the landing gear extended.
V
:
Maximum Landing Gear Operating Speed is the maximum speed at which the landing gear can
LO
be safely extended or retracted.
V
:
Maximum Operating Speed is the speed limit that may not be deliberately exceeded in normal
MO
flight operations.
V
:
Rotation Speed is the speed at which rotation is initiated during takeoff to achieve takeoff safety
R
speed at screen height.
V
:
Stalling Speed or the minimum steady flight speed at which the airplane is controllable in the
SO
landing configuration.
V
:
Stalling Speed or the minimum steady flight speed obtained in a specific configuration.
S1
Edition 0 -- October 31, 2013
Rev. 1
altitude if it is set to QNH.
°
at sea level pressure altitude and decreases by 2°C
(59
F)
NOTE
SECTION 1
GENERAL
°
for each 1000 ft of altitude.
(3.6
F)
Page 1.4.1
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