FA-66240 / Aviation weight and balance / Member archive

Ground CG taken as the plain average of item arms · case 05

A light item far aft moves the computed CG as much as the airframe itself.

Member previewVariant 5 · 3 implementations · 10 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
normal ground load	`["OK", 1605.4, 8944.6]`	`["OK", 1767.4, 8782.6]`	Failed

MEMBER ARCHIVE

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