FA-66222 / Aviation weight and balance / Member archive

CG exactly over the main gear reported as light nose · case 02

An aircraft balanced exactly on the mains is reported LIGHT_NOSE with zero nose load instead of TIP.

Member previewVariant 2 · 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
CG exactly over mains	`["LIGHT_NOSE", 0.0, 10000.0]`	`["TIP", 290.0]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.