Tecnam P2002-JF, Flight Manual, Page: 19 / 435

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Section 1 – General
ACRONYMS AND TERMINOLOGY
3
rd
Edition, Rev 0
W
EIGHT AND BALANCE TERMINOLOGY
4.5
Datum
“Reference datum” is an imaginary vertical
plane from which all horizontal distances
are measured for balance purposes.
Arm is the horizontal distance of an item meas-
ured from the reference datum.
Moment is the product of the weight of an item mul-
tiplied by its arm.
C.G. Center of Gravity is the point at which the
airplane, or equipment, would balance if
suspended. Its distance from the reference
datum is found by dividing the total moment
by the total weight of the aircraft.
Standard Empty Weight is the weight of the aircraft with engine flu-
ids and oil at operating levels.
Basic Empty Weight is the standard empty weight to which it is
added the optional equipment weight.
Useful Load is the difference between maximum takeoff
weight and the basic empty weight.
Maximum Takeoff Weight is the maximum weight approved to perform
the takeoff.
Maximum Landing Weight is the maximum weight approved for the
landing touchdown (for
P2002-JF it is
equivalent to the Maximum Takeoff
Weight).
Tare is the weight of chocks, blocks, stands, etc.
used when weighing an airplane, and is in-
cluded in the scale readings. Tare is de-
ducted from the scale reading to obtain the
actual (net) airplane weight.