🛶 Longboat Rowing: Hull Speed, Froude Number, Wave Drag and Crew Power (2D)

Side view of a long oared boat with its own bow wave, above a trace of the boat speed during the strokes. Set the number of rowers, the power of each, the waterline length, the mass, the fineness of the hull and the stroke rate, and see the steady speed where crew power meets hull resistance, the Froude number, the hull-speed limit, the split between friction and wave drag and the speed ripple in each stroke. The hull speed, the power balance, the friction law and the energy of the stroke are checked numerically, with four in-page numerical checks.