FA-65880 / Aviation weight and balance / Member archive

Sloped forward limit interpolated from the wrong end · case 05

Heavy aircraft get a forward limit near 35 in and light aircraft near 41 in on the sloped segment.

Member previewVariant 5 · 3 implementations · 13 checks per implementation

Case contract

Input [weight lb, CG in, 'normal'|'utility']. Below 1500 lb -> 'ERR_BELOW_EMPTY'. Max weight 2550 normal / 2200 utility -> 'OVERWEIGHT' first. Forward limit 35.0 in up to 1950 lb then linear to 41.0 in at 2550 lb; aft limit 47.3 normal / 40.5 utility. Limits inclusive; else 'FWD','AFT','IN'.

Why this case matters

A category-dependent CG envelope with a sloped forward boundary; limit lines are part of the approved envelope.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: forward limit interpolation	`"FWD"`	`"IN"`	Failed

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