Project 33

C3 — CAD generator software

Field	Value
Status	SUPPORTED WITHIN STATED LIMITS — Evidence supports the statement as worded, at its evidence class only.
Strongest accepted evidence	IMPLEMENTATION ONLY
Evidence classes cited	IMPLEMENTATION, TEST PROCEDURE
Gate reached	SOFTWARE REPRODUCTION (next: SYNTHETIC TEST)
Last review	CURRENT — snapshot recorded 2026-09-29 by tooling snapshot (no human review)

Question. Does the parametric generator produce correct NACA 4-digit coordinates and exportable solids?

Current statement. The NACA 4-digit generator’s coordinates, symmetry, input validation, and STEP export are covered by automated tests. Test source is committed; a record that the tests ran exists only in reviews built with an execution record.

Requirements

ID	Requirement	Check	Bound	Observed	Result
R-C3-PROFILE	Generated NACA 00xx coordinates scale to the chord and are symmetric about the chord line.	test	none stated	No execution record attached; test source alone is not a run.	NOT EVALUATED IN THIS BUILD
R-C3-STEP	The generator exports readable STEP solids with collision-free file names.	test	none stated	No execution record attached; test source alone is not a run.	NOT EVALUATED IN THIS BUILD

Known contradictions

• None on record.

Open questions

• None recorded.

Discrepancies

• None linked.

Assumptions

• The pinned CadQuery version and the test environment match the CI workflow.

Limitations

• Generating a solid does not establish aerodynamic or structural performance.
• Fusion 360 behavior is not exercised by CI; only the geometry module and packaging are.

Measurement needed to close the next gate

• Independent inspection of an exported fin profile against the NACA definition.

Pre-registered experiments

• None.

What this claim does not establish

• Any inert physical measurement: none has been accepted for this claim.
• Physical performance of any hardware.
• Flight readiness or safety for live propulsion.

Evidence

Artifact	Class	SHA-256 (first 12)	What it is
CAD Files/naca_fin_generator.py	IMPLEMENTATION	9d19d2ce4f06	NACA 4-digit coordinate generator with optional CadQuery STEP export.
CAD Files/FusionScripts/Project33NacaFin/Project33NacaFin.py	IMPLEMENTATION	52754c73baf5	Fusion 360 script package that sketches the NACA 0012, 60 mm profile.
docs/assets/review/c3_naca0012_profile.svg	IMPLEMENTATION	6afe5f42d7e6	NACA 0012, 60 mm chord profile with chord and maximum-thickness dimensions. Geometry only.
tests/test_naca_fin_generator.py	TEST PROCEDURE	4dba7f7013f2	Coordinate, symmetry, input-validation, and STEP export tests.
tests/test_fusion_script_install.py	TEST PROCEDURE	f02aa050624e	Fusion script packaging and installer tests.
.github/workflows/ci.yml	IMPLEMENTATION	1aa2ade27c00	CI configuration. A configuration is not a record that any particular run passed.

Earlier versions (failure archive)

• evidence/archive/notes-v1/C3_naca_sweep.md — Historical C3 note.

A change to any of these files makes the last review insufficient

• .github/workflows/ci.yml
• CAD Files/FusionScripts/Project33NacaFin/Project33NacaFin.py
• CAD Files/naca_fin_generator.py
• docs/assets/review/c3_naca0012_profile.svg
• tests/test_fusion_script_install.py
• tests/test_naca_fin_generator.py
• tools/review_figures.py

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All claims · Traceability · Discrepancies · Evidence Observatory

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