FreeCAD (sean-de-courcy)MCADConfidence: Medium

A PartDesign Pipe in Binormal mode folded its section where the spine's tangent passes the binormal, and read the binormal in the wrong frame; both cases built solids that pass OpenCascade's BRepCheck and are wrong, with no message (the author calls them "silent wrong results").

Impact Analysis

Persona

Mechanical Designer

Team Size Impact

5x Multiplier

Prototype Delay

3 Days

Est. Annual Cost

$30,000

1 user · 1 month240 min
Rest of team960 min
Rest of year13,200 min

monthly_minutes × 12 × team_multiplier ÷ 60 × $75/hr = $30k/yr

$75/hr assumed rate.

Annual team-minutes decomposed from the reported monthly inputs.

Evidence & Sources

1 Sources

sean-de-courcy/FreeCAD PR #380: PartDesign: a Binormal Pipe fails where its section folds; Binormal in the Body's coordinates (ops#406, ops#458)

github.com

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Analyst Notes

From the Grok pain-radar digest, Oct 25-26 2026 (Oct 25 daytime to Oct 26 morning slots). Verified live 2026-10-26: issue/PR read on GitHub; title and state confirmed.