🚤 English Canal Simulator: Operate a Narrowboat Lock

Work a stone narrow-canal lock by hand: wind the paddles, fill and drain the chamber (Q = Cd a sqrt(2 g dh)), open the gates only when the water is level, tie up against the jet, and keep the stern clear of the cill. A water ledger and a live level graph show what each boat costs the canal.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install