Pilot's Operating Handbook
Section 1
General
Edition 0 - October 31, 2013
Rev. 4
Page 1.4.1
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.
●
NOTE
●
On the ground, the altimeter will indicate zero if it is set to QFE. It will indicate
airport altitude if it is set to QNH.
●
Standard Temperature :
Is 15
°
C (59
°
F) at sea level pressure altitude and decreases by
2
°
C (3.6
°
F) for each 1000 ft of altitude.
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
A
:
Maneuvering Speed is the maximum speed at which full or abrupt
control movements may be used.
V
FE
:
Maximum Flap Extended 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.
PIM - DO NOT USE FOR FLIGHT OPERATIONS