SECTION 1
GENERAL
TBM
700
PILOT’S OPERATING HANDBOOK
Page 1.4.1
Edition 1 -- November 30, 2010
Rev. 0
1.4 -- ABBREVIATIONS AND TERMINOLOGY
METEOROLOGICAL TERMINOLOGY
ISA
:
International standard atmosphere
OAT
:
Outside air temperature
is the free air static temperature. It
is expressed in either degrees Celsius or degrees
Fahrenheit.
SAT
:
Static air temperature
QFE
:
Atmospheric pressure at the airport reference point.
QNH
:
QFE value corrected according to the airport altitude.
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.