Sling LSA
Section 6
Pilot Operating Handbook
Weight and Balance
Document Number: DC-POH-002-X-A-6
Page | 6-4
Revision: 3.0
Date: 2021/04/23
6.5
Determination of CG
Sling Aircraft makes use of a numerical method in calculating the Cg of
the aircraft. The following will be required to complete a CG check:
#
Item
1
Empty CG Value
2
Blank CG Form
3
Forward CG
Check
4
Rear CG Check
The principal formula for CG calculation is:
𝐶𝐶𝐶𝐶
=
𝑇𝑇𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀
𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀
𝑇𝑇𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀
𝑊𝑊𝑀𝑀𝑀𝑀𝑊𝑊ℎ𝑀𝑀
The %MAC formulas are:
%
𝑀𝑀𝐾𝐾𝐶𝐶
= (
𝐶𝐶𝐶𝐶 −
1366
𝑀𝑀
) ×
100
1339
𝑀𝑀𝑀𝑀
𝑀𝑀𝐹𝐹
,
%
𝑀𝑀𝐾𝐾𝐶𝐶
= (
𝐶𝐶𝐶𝐶 −
4.482
𝑓𝑓𝑀𝑀
. ) ×
100
4.393
𝑓𝑓𝑀𝑀
.
WARNING
For each flight, the most forward CG (full take-off fuel) and the most
rearward CG (landing fuel) must be calculated to be within aircraft CG
range limits.