S201 AFM
1 - GENERAL INFORMATION
1.6 - DEFINITION AND
ABBREVIATIONS
27/06/2019
SONAIR-S2-D-MAN-006
Page : 1-15
Rev. : A
Weight and balance terminology and symbols
Arm
Is the horizontal distance from the reference datum to the
centre of gravity of an item.
CG or CoG
Centre of Gravity, being the point at which the airplane, or
equipment, would balance if suspended.
Datum
Reference datum is an imaginary vertical plane from which all
horizontal distances are measured for balance purposes.
MEW
Maximum Empty weight
Is the weight of the airplane with engine fluids and oil at
operating levels, without fuel, pax and baggages.
MAC
Mean Aerodynamic Chord.
MLW
Maximum Landing Weight
Is the maximum weight approved for the landing touch down.
MTOW
Maximum Take-off Weight is the maximum weight approved
for the start of the take-off run.
Moment
Is the product of the weight of an item multiplied by its arm
SG (fuel)
Specific Gravity is the ratio of the mass of fuel to the mass of
water for the same given volume
W
R
Weight read from scale under right main wheel during aircraft
weighing.
W
L
Weight read from scale under left main wheel during aircraft
weighing.
W
N
Weight read from scale under nose main wheel during aircraft
weighing.
W
E
Aircraft empty weight.