Sailboat Spade-Rudder Stock Bending Stress (ISO 12215-8) & High-Heel Stall Verifier

Deterministic ISO 12215-8 hydrodynamic side-force & torque combined von Mises stock stress + NACA 0012 free-surface ventilation stall boundary engine (.json, .pdf, .dxf) built for Jefa Steering, Edson Marine, Hanse, Beneteau — zero-upload ephemeral Wasm RAM execution.

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