FA-66144 / Aviation weight and balance / Member archive

Trim interpolation measured from the upper node · case 04

Values between nodes are mirrored: a CG just aft of a node gets nearly the next node trim.

Member previewVariant 4 · 3 implementations · 11 checks per implementation

Case contract

Input {'pmac','flaps','tables':{flap string:[[%MAC, trim units] ascending]}}. Missing flap table -> 'ERR_FLAPS'; %MAC outside the table's inclusive range -> 'ERR_RANGE' (no extrapolation or clamping); otherwise linear interpolation between bracketing nodes, rounded to 0.1 unit.

Why this case matters

Takeoff stabilizer trim is read from a flap-specific table indexed by %MAC; out-of-table values must not be silently clamped.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
mid table flaps 5	`3.6`	`5.0`	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.