Tecnam P92-JS - WEIGHT AND BALANCE TERMINOLOGY

FLIGHT MANUAL
Date: Issue 3: 25
th
May2010
I-10
P92-JS
S E C T I O N 1
GENERAL
WEIGHT AND BALANCE TERMINOLOGY
Datum
is an imaginary vertical plane from which all horizontal
distances are measured for balance purposes.
Arm
is the horizontal distance from the reference datum to the
center of gravity (C.G.) of an item.
Moment
is the product of the weight of an item multiplied 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 airplane.
Standard
Empty
Weight
Standard Empty Weight is the weight of a standard airplane,
including unusable fuel, full operating fuels and full engine
oil.
Basic Empty
Weight
is the standard empty weight plus the weight of optional
equipment.
Useful Load
is the difference between takeoff weight and the basic empty
weight.
Maximum
Weight
is the maximum certified weight of the aircraft.
Maximum
Takeoff
Weight
is the maximum weight approved for the start of the takeoff
run.
Maximum
Landing
Weight
is the maximum weight approved for the landing touch
down.
Tare
is the weight of chocks, blocks, stands, etc. used when
weighing an airplane, and is included in the scale readings.
Tare is deducted from the scale reading to obtain the actual
(net) airplane weight.