DIAMOND AIRCRAFT
DA 20/100 Flight Manual
General
Doc # DA202-100-VLA
20 December, 2000
Page
Issue 1
1 - 11
1.11.2. Meteorological Terms
ISA:
International Standard Atmosphere at which air is identified as a dry gas. The temperature at
mean sea level is 15° Celsius (59° F), 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 -56.5° C (-67.9° F)
is -0.0065° C/m (-0.0036° F/ft) and 0° C/m (0° F/ft) above.
OAT: Outside air temperature.
AGL: Above Ground Level
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 / 29.92 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/Airport Pressure:
Actual atmospheric pressure at the aerodrome/airport altitude.
Wind: The wind speeds used in the diagrams in this manual should be referred to as headwind or
tailwind components of the measured wind.
1.11.3. Powerplant
Take-off Power:
Maximum engine power for take-off.
Maximum Continuous Power:
Maximum permissible continuous engine output power during flight.