FA-66005 / Aviation weight and balance / Member archive

Aircraft exactly on a limit asked to carry ballast · case 05

A CG exactly on the forward or aft limit produces a nonzero ballast or an error.

Member previewVariant 5 · 3 implementations · 12 checks per implementation

Case contract

Input [W lb, CG, fwd limit, aft limit, ballast arm, max weight]. Inside inclusive limits -> 0. Otherwise ballast B brings CG to the violated limit: B = W*(CG-limit)/(limit-arm), rounded up to whole lb; ballast arm not on the corrective side of that limit -> 'ERR_BALLAST_ARM'; W+B above max -> 'ERR_OVERWEIGHT'.

Why this case matters

Ballast adds weight at a fixed station; the required amount depends on the distance from the ballast arm to the violated limit, and adds to gross weight.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
exactly on aft limit	`"ERR_OVERWEIGHT"`	`0`	Failed

MEMBER ARCHIVE

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