Work out ballast requirement instantly with clear inputs, formula shown and shareable results.
Ballast is sized from the moment equation: the added weight must shift the whole aircraft's CG from where it is to where you want it. Solving W x (target - CG) = ballast x (arm - target) gives the mass needed at a chosen station, which is why a station far from the target needs much less ballast.
Ballast mass
Ballast = W x (target CG - current CG) / (ballast arm - target CG)
Aviation results are planning estimates only. Always verify take-off, landing, fuel, weight and balance figures against the certified Aircraft Flight Manual, current performance charts and applicable aviation regulations before flight.
Leverage. Ballast placed close to the target CG has almost no effect, so the denominator shrinks and the required mass grows very quickly.
Yes. Ballast must be permanently or positively secured, placarded, and entered in the weight and balance record — loose ballast is a hazard in turbulence.