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Millrace — Overshot Gristmill Simulator

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Oct 2, 2026

A fully working 3D overshot gristmill you can actually operate. Adjust the sluice gate opening and head pressure, and watch real hydraulic physics cascade through the system: water flow in L/s, wheel RPM, shaft power, torque curves, and flour output in kg/h all update live. The isometric 3D model lets you section, explode, wireframe, or name every component. Built with Claude Opus 5.5, it's the kind of engineering toy that makes you want to skip work and mill grain all afternoon.

  • Live hydraulic simulation: tweak gate opening and water head, and the physics (flow rate, jet speed, torque) recalculate instantly
  • Full 3D model with section, explode, wireframe, and names view modes — a proper engineering breakdown
  • Real efficiency data: the 4.8m, 36-bucket wheel runs at 45% efficiency with 313 kg of water held at any moment

“Lots of inventive things made with Claude these past few weeks. A few of our favorites: A working watermill, built with Opus 5.5. ”

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