FA-65848 / Aviation weight and balance / Member archive

Avgas and jet fuel densities transposed · case 03

Fuel weight is overstated for avgas aircraft and understated for diesel-converted aircraft.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Input {'empty':[lb,in],'items':[[name,lb,in]],'fuel_gal','fuel_arm','fuel_type'}; fuel density 6.0 lb/gal for 100LL and 6.7 for JETA, other grades return 'ERR_FUEL_TYPE'; negative item weights are removals at that arm; return [total lb, total lb-in, CG in] rounded 1/1/2.

Why this case matters

Loaded-aircraft CG is the sum of station moments divided by total weight; every station, including the empty aircraft and fuel, must contribute both weight and moment.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
four-seat normal load	`[2426.0, 103850.0, 42.81]`	`[2398.0, 102506.0, 42.75]`	Failed

MEMBER ARCHIVE

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

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