Piper Malibu PA-46-310P Pilot Operating Handbook page 38

PIPER AIRCRAFT CORPORATION
PA-46-310P, MALIBU
SECTION I
GENERAL
(f)
Weight and Balance Terminology
Reference Datum
Station
Arm
Moment
Center of Gravity
(C.G.)
C.G. Arm
C.G. Limits
Usable Fuel
Unusable Fuel
Standard Empty
Weight
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 reference
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 balance
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.
The arm obtained by adding the airplane's
individual moments and dividing the sum
by the total weight.
The extreme center of gravity locations
within which the airplane must be operated
at a given weight.
Fuel available for flight planning.
Fuel remaining after a runout test has been
completed in accordance with govern-
mental regulations.
Weight of a standard airplane including
unusable fuel, full operating fluids and full
oil.
ISSUED: JANUARY 11, 1984 . . REPORT: VB-1200
1-11