FA-66228 / Aviation weight and balance / Member archive

Nose-load threshold taken as a fraction of main gear load · case 03

Aircraft with a nose load slightly under 5% of gross weight are reported OK.

Member previewVariant 3 · 3 implementations · 11 checks per implementation

Case contract

Input {'items':[[lb,arm]],'main_arm','nose_arm'}. CG at or aft of the main gear -> ['TIP', CG r2]. Otherwise nose reaction = W*(main-CG)/(main-nose), main = W - nose; status 'LIGHT_NOSE' if nose < 5% of total weight else 'OK'. Return [status, nose r1, main r1].

Why this case matters

Ground stability depends on the split of weight between nose and main gear; a CG over or behind the mains tips the aircraft onto its tail.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: light nose threshold base	`["OK", 473.1, 9018.9]`	`["LIGHT_NOSE", 473.1, 9018.9]`	Failed

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