Piper Turbo Saratoga PA-32-301T Pilot's Manual page 33

PIPER AIRCRAFT CORPORATION SECTION 1
PA-32-301T, TURBO
SARATOGA
GENERAL
(f)
Weight and
Balance
Terminology
Reference
Datum An imaginary
vertical plane from which all
horizontal
distances
are
measured for
balance
purposes.
Station
.
A location along the
airplane
fuselage
usually given in
terms
of distance from the
reference
datum.
Arm The horizontal distance
from the
reference
datum
to
the center of gravity (C.G.) of an
item.
Moment The product
of the weight of an
item
multiplied by its arm. (Moment divided by
a constant
is
used to
simplify
balance
calculations
by
reducing
the number of
digits.)
Center
of Gravity The point at which an airplane would
(C.G.) balance if
suspended.
Its distance from the
reference datum is found
by
dividing the
total moment by
the
total
weight of the
airplane.
C.G. Arm The
arm obtained
by
adding the airplane's
individual
moments
and dividing the
sum
by the total weight.
C.G. Limits
The
extreme
center
of gravity locations
within which
the
airplane must
be
operated
at a given weight.
Usable Fuel
Fuel
available for flight planning.
Unusable
Fuel
Fuel remaining after a runout test has
been
completed
in accordance with
govern-
mental regulations.
Standard Empty
Weight of
a
standard
airplane
including
Weight
unusable
fuel, full operating
fluids and full
oil.
ISSUED: JANUARY 10, 1980 REPORT: VB-1070
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