Wingfoil & Kitefoil Rider-Weight, Wind-Threshold & Hydrofoil Front-Wing Matcher

Deterministic Hydrofoil takeoff lift threshold (W_total = 0.5*rho_water*V_takeoff^2*S_foil*C_L_max) coupled with hand-wing aerodynamic drive vs hull displacement drag engine (.json, .csv) built for Duotone Foil, Axis Foils, Armstrong Foils, F-One — zero-upload ephemeral Wasm RAM execution.

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