Sectionl
General
GPH
PPH
BEECHCRAFT
Debonair
C33
Bonanza E33
end
F33
U.S. Gallons per hour.
Pounds per hour.
WEIGHT
AND
BALANCE
TERMINOLOGY
Reference
Datum
Station
Arm
Moment
Airplane
Center of
Gravity
(C.G.)
C.G.
Arm
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.
lts
distance
from
the
reference
datum
is found
by dividing
the
total
moment
by the
total
weight
of
the
airplane.
The arm obtained by adding
the
air-
plane"$
individual moments. and
dividing
the
sum
by
the
total
weight.
August
1982
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