Boat & Camper Trailer 12% Tongue-Weight & Critical Sway-Speed Simulator

Deterministic 2-DOF articulated vehicle-trailer lateral bicycle model eigenvalue stability locus (damping ratio zeta vs speed, tongue ratio & yaw moment of inertia I_zz) engine (.json, .csv) built for AL-KO, Knott, Airstream, Thule / Brink — zero-upload ephemeral Wasm RAM execution.

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