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What changes
Larger aircraft add limits a light aircraft may not have — maximum ramp, zero fuel and landing weights — state the CG in % MAC, use loading indexes and load in zones or compartments. The method is the same: weight × arm, sum, divide, check.
The figures below are a general example (LEMAC 625.0 in, MAC 134.5 in), not any real aircraft. Real limits come from that aircraft’s approved weight-and-balance manual.