Mooney M20J - Page 19

MOONEY
MODEL M20J
SECTION I
GENERAL
Indicated
The number actually read from an altimeter when,
Pressure
and only when, the barometric
subscale has been set
Altitude
to 29.92 inches of mercury or 101 3.2 millibars.
ISA
OAT
INTERNATIONAL STANDARD ATMOSPHERE assumes that
(1) The air is a dry perfect gas; (2) The temperature at sea level
is 15 degrees Celsius (59 degrees F); (3) The pressure at sea
level is 29.92 inches Hg (1913.2 mb);
(4) The temperature
gradient from sea level to the altitude at which the
temperature is -56.5 degrees C (-69.7 degrees F) is -0.00198
degrees
C (-0.003564 degrees F) per foot.
OUTSIDE AIR TEMPERATURE
- The free air static tempera-
ture, obtained either from
inflight temperature indications or
ground meteorological sources. It is expressed in degrees
Celsius (previously Centigrade).
Pressure
The indicated pressure altitude corrected for position
Altitude and instrument error. In this handbook, altimeter
instrument errors are assumed to be zero.
Station Actual atmospheric pressure at field elevation.
Pressure
Arm The horizontal distance from the reference datum to the
center of gravity
(C.G.) of an item.
Basic The actual weight of the airplane and includes all Empty
operating equipment including optional equipment) that
Weight
has a fixed location and is actually installed
in the
aircraft.
It includes the weight of the unusable fuel and
full oil.
Center of
The point
at which an airplane would balance if
Gravity
suspended. Its distance
(C.G.)from the reference datum
is found by dividing the total moment by the total weight of
the airplane.
C.6. Arm
The arm obtained by adding the airplane's individual
moments and dividing the sum by the total weight.
C.G. in
Center of Gravity expressed
in percent of mean
percent aerodynamic chord.
MAC
C.G.
The extreme center of gravity locations within which the
Limits airplane must be operated at a given weight.
REV. B 6-1 2-87
ISSUED 6-2-86 1-9