Aviation & Aeronautics
Basic
Center of Gravity
The center of gravity is the total moment divided by total weight — the core of every weight-and-balance calculation.
Formula
Variables
CGCenter of gravity (arm)
\sum MSum of moments (weight × arm)
\sum WTotal weight
Example
Moments 250,000 in-lb, weight 2,500 lb: CG = 100 in
Did You Know?
A CG outside limits can make an aircraft uncontrollable — weight and balance is checked before every flight.
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