HOAC AUSTRIA
DV 20
Flight Manual
vs:
The power-off stall speed with the airplane in its current configuration.
vso:
The power-off stall speed with the airplane in landing configuration.
vx:
Best angle-of-climb speed.
Vy:
Best rate-of-climb speed.
b)
Meteorological Terms
General
ISA:
International Standard Atmosphere at which air is identified as dry gas. The temperature at
mean sea level is
15
°C
(59
OF), the air pressure at sea level is
1013.25
mbar
(29.92
inHg),
the temperature gradient up to the altitude at which the temperature reaches
-55.5
°C
(-67.9
OF) is
-0.0065
°C/m
(-0.0036
°FIft) and
0
°C/m
(0
°F/ft) above.
OAT: Outside air temperature.
Indicated Pressure Altitude:
Altitude reading with altimeter set to
1013.25
mbar
(29.92
inHg) air pressure.
Pressure Altitude:
Altitude measured at standard pressure at
MSL (1013.25
mbar
129.92
inHg) using a
barometric altimeter. Pressure altitude is the indicated altitude corrected for installation and
instrument errors. Within this manual the instrument errors are assumed to be zero.
Aerodrome Pressure:
Actual atmospheric pressure at the aerodrome altitude.
Revision No.
Reference
Date
October
20, 1993
Page
1 - 10