
Airplane Factory SLING 2
Pilot Operating Handbook
Page | 1-17
DC-POH-002-X-B-6
Revision : 2.6
Weight and balance terminology and symbols
Arm
The horizontal distance from the reference datum to the centre of
gravity of an item.
CG
Centre of Gravity, being 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.
Datum
Reference datum is an imaginary vertical plane from which all
horizontal distances are measured for balance purposes. (In the
Sling this plane runs through the centre point of the flat front face
of the engine flange of the Rotax engine).
Empty
weight
The weight of the airplane with engine fluids and oil at operating
levels.
MAC
Mean Aerodynamic Chord.
MAUW
Maximum All Up Weight.
Maximum
Landing
Weight
The maximum weight approved for the landing touch down.
Maximum
Take-off
Weight
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
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.
W
T
Aircraft total weight.
W
MAUW
Aircraft maximum (allowed) all up weight.
L
R
Right main wheel arm (aft of reference).
L
L
Left main wheel arm (aft of reference).