🎡 Medieval Treadwheel Crane: Crew Torque, Load Limit and Rope Speed (2D side view)

Side view of a human-powered treadwheel crane with a big tread wheel and a small rope drum on one shaft. Choose cargo mass, crew size, effort, efficiency and drive mode, and watch required against available torque, the load limit and the rope speed. Same physics file as the 3D page, with four in-page numerical checks.