Mahindra GIPPSAERO GA8-TC 320 - Power Terminology; Meteorological Terminology

C01-01-08 5 Feb 2009 Page 1-9
Section 1
Model GA8-TC 320 General
V
S
Stalling Speed: or the minimum steady ight speed at which the aircraft is
controllable.
V
S0
Stalling Speed: or the minimum steady ight speed at which the aircraft is
controllable in the landing conguration.
V
X
Best Angle-of-Climb Speed: the airspeed which delivers the greatest gain of altitude
in the shortest possible horizontal distance.
V
Y
Best Rate-of-Climb Speed: the airspeed which delivers the greatest gain in altitude
in the shortest possible time.
V
REF
Reference Landing Approach Speed: the airspeed equal to 1.3V
S0
and is the
airspeed used on approach down to 50 ft above the runway when determining
landing distances.
1.3.3. Meteorological Terminology
ISA International Standard Atmosphere in which:
The air is a dry perfect gas:
The temperature at sea level is 15°C (59°F) :
The pressure at sea level is 1013 hPa (29.92 in Hg) :
The temperature gradient from sea level to the altitude at which the temperature
is -56.5°C (-69.7°F) is -0.00198°C (-0.003566°F) per foot, and zero above that
altitude.
OAT (Outside Air Temperature) The outside free air static temperature.
Aireld Pressure Height The height registered at the surface of an aerodrome by an altimeter
with the pressure sub-scale set to 1013 hPa (29.92 in Hg).
Pressure Altitude Altitude measured from standard sea-level pressure (1013 hPa/29.92 in
Hg) by a pressure or barometric altimeter corrected for position and instrument error.
Indicated Pressure Altitude The altitude actually read from an altimeter when the pressure
barometric sub-scale has been set to 1013 hPa (29.92 in Hg).
Station Pressure Actual atmospheric pressure at eld elevation.
QNH The local pressure setting that if set on the subscale of an altimeter will cause the
altimeter to indicate local altitude above mean sea level.
Wind The wind velocities to be used as variables on aircraft performance are to be understood
as the headwind or tail wind components of the reported winds.
1.3.4. Power Terminology
Take-Off Power Maximum power permissible for take-off.
Maximum Continuous Power Maximum power that is allowed to be used continuously during
ight.
Alternate Take-off Power Maximum rated power for the engine. For the Lycoming
TIO-540-AH1A this is 40 in Hg at 2500 RPM at or below 5000 ft pressure altitude.
01 Aug 2011