Sling LSA
Section 1
Pilot Operating Handbook
General Information
Document Number: DC-POH-002-X-A-6
Page | 1-13
Revision: 3.0
Date: 2021/04/23
1.5.6
Weight and Balance Terminology/Symbols
Terminology Description
Arm
The horizontal distance from the reference datum to the centre
of gravity / point load of / on the aircraft
CG
Centre of Gravity, being the point at which the airplane would
balance if suspended. Value given as distance from the reference
datum or as a percentage of MAC, and has minimum and
maximum permissible values.
Datum
The reference datum is an imaginary vertical plane from which all
horizontal distances are measured for weight and balance
purposes. The Sling LSA datum is the forward, flat propeller
mounting flange on the Rotax engine
Empty
Weight
The weight of the airplane with engine fluids at operating levels.
MAC
Mean Aerodynamic Chord.
The average chord value of the main wing.
MAUW
Maximum All Up Weight or Maximum Takeoff Weight.
Maximum permissible weight approved for takeoff/flight
Maximum
Landing
Weight
The maximum weight approved for the landing touch down
Moment
The product of the weight of an item multiplied by its arm
W
R
Weight reading from scale under right main wheel during aircraft
weighing
W
L
Weight reading from scale under left main wheel during aircraft
weighing
W
N
Weight reading from scale under nose main wheel during aircraft
weighing
W
E
Aircraft empty weight
W
T
Aircraft total weight
L
R
Right main wheel arm (aft of reference)
L
L
Left main wheel arm (aft of reference)
L
N
Nose wheel arm (aft of reference)
M
T
Total moment arm