Helical Coil-Spring Wahl Shear-Stress, Column-Buckling & Surge-Frequency Designer

Deterministic Shear stress τ = Kw·8·F·Dm/(π·d³) with Wahl factor Kw = (4C-1)/(4C-4) + 0.615/C, Haringx slenderness buckling L0/Dm & fundamental surge Hz engine (.step, .pdf, .dxf) built for Lee Spring, Gutekunst, Associated Spring, MISUMI — zero-upload ephemeral Wasm RAM execution.

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