aero-qa-aerostructures

name	aero-qa-aerostructures
description	QA checklist for OpenAeroStruct aero/structures work in open-air. Use when editing or reviewing src/openair/aero/**, src/openair/structures/**, aero.json, structures.json, trim/stability results, or OAS surface dicts.

Aero / structures QA (OpenAeroStruct)

Read docs/guidebook/03-openaerostruct.md and 09-sizing-aero-buildup.md; execute their "Check your work" lists.

Non-negotiables for this repo:

• Every AeroPoint surface needs BOTH mesh connections (<surface>.def_mesh and aero_states.<surface>_def_mesh) — a missing wing or fallback-htail connection gives NaN or silently-wrong results from the default mesh.
• CM is about the cg input; trim work must reference the real CG from openair.mission.balance, and the flat VLM needs the thin-airfoil cm_ac added for cambered sections.
• Trim gates in aero.json: trim.converged, selected control within ~1° of spec (tailless washout or fallback-tail incidence), |cm_residual| < 0.005, and stability.sm_full/.sm_reserve inside the mission band (measured from dCM/dCL, not the geometric model).
• Wingbox failure <= 0 at +4g is the pass criterion (KS of von Mises over allowable minus 1, safety factor 1.5). W0 excludes wing mass and OAS's internal fuel burn (keep R tiny).
• Custom NLBGS solvers must keep err_on_non_converge=True.
• Mesh conventions: num_y odd full-span; symmetric half is the LEFT wing — j=0 tip, j=-1 root; spanwise CP arrays are tip-first.