🏰 English Castle Simulator: Drawbridge Counterweight, Moat Balance and Gate Arch

Walk around a generic moated English castle and find out how heavy a counterweight must be so two people can raise a two-tonne drawbridge. Watch the chain tension, windlass torque and crank force change with the angle, let the moat fill toward its weir-set level, and see the thrust of the gatehouse arch. Peaceful engineering, no battles.

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