Diamond DA 40, Руководство по эксплуатации самолета

Страница: 25 / 300

DA 40 AFM General
Doc. # 6.01.01-E Rev. 8 01-Dec-2010 Page 1 - 9
(b) Meteorological Terms
ISA: International Standard Atmosphere. Conditions at which air is
identified as an ideal dry gas. The temperature at mean sea level is
15
E
C (59 °F), air pressure at MSL is 1013.25 hPa (29.92 inHg); the
temperature gradient up to the altitude at which the temperature
reaches -56.5
E
C (-69.7 °F) is -0.0065
E
C/m (-0.00357 °F/ft), and
above this 0
E
C/m (0 °F/ft).
MSL: Mean Sea Level.
OAT: Outside Air Temperature.
QNH: Theoretical atmospheric pressure at MSL, calculated from the
elevation of the measuring point above MSL and the actual
atmospheric pressure at the measuring point.
Indicated Pressure Altitude:
Altitude reading with altimeter set to 1013.25 hPa (29.92 inHg).
Pressure Altitude: Altitude above MSL, indicated by a barometric altimeter which is set
to 1013.25 hPa (29.92 inHg). The Pressure Altitude is the Indicated
Pressure Altitude corrected for installation and instrument errors.
In this Airplane Flight Manual altimeter instrument errors are regarded
as zero.
Density Altitude: Altitude in ISA conditions at which the air density is equal to the
current air density.
Wind: The wind speeds which are shown as variables in the diagrams in
this manual should be regarded as headwind or downwind
components of the measured wind.