Section
I
General
Route
Segment
GPH
BEECHCRAFT
Baron
58
Serial TH
773
and
After
A part of a route. Each end of
that
part is identified by: (1) a geograph-
ical location; or
(2) a point at
which
a definite radio fix can be established.
U.S. Gallons per hour.
WEIGHT
AND
BALANCE
TERMINOLOGY
Reference
Datum
Station
Arm
Moment
Airplane
Center of
Gravity
(C.G.)
1-18
An imaginary vertical plane
from
which
all horizontal distances are
measured for balance purposes.
A location along the airplane fuselage
usually given in terms of distance
from the reference datum.
The horizontal distance from the ref-
erence datum to the center of gravity
(C.G.) of an item.
The product of the
weight
of an item
multiplied by its arm.
(Moment
divided
by a constant is used to
simplify
bal-
ance calculations by reducing the
number of digits.)
The point at
which
an airplane
would
balance if suspended. Its distance
from the reference datum is found
by dividing the total
moment
by the
total
weight
of the airplane.
September. 1979
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