Verify before flight. Check the POH/AFM for aircraft-specific limits and performance.
Weight & Balance
Ballast Required Calculator
Estimate ballast required to move CG to a target location, using a chosen ballast arm.
lb
in
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Ballast required—
New total weight—
Direction—
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Moving CG from 84 to 86 inches
For 2,200 lb at an 84 in CG, targeting 86 in with ballast at 140 in requires 2,200 × (86 − 84) / (140 − 86) = 81.5 lb.
The new total is 2,281.5 lb. Recheck the approved weight and CG envelope; reaching a target CG alone does not make the loading permissible.
Formula and method
The ballast equation balances the existing aircraft moment against the target CG and selected ballast arm.