🌾 Overshot Waterwheel: Gear Train, Millstone Speed and Water Power (2D side view)

2D side view of a Podillia-style overshot waterwheel: flume flow and head set the hydraulic and shaft power, a 36:9 gear train spins the millstone four times faster, and a bucket model shows when water spills, with the same formulas and ranges as the 3D page.