🌉 Tower Bridge Simulator: Bascule Lift, Counterweight Torque and Ship Clearance Lab

Run a Victorian bascule bridge on the Thames: stop the road, raise the two leaves, let a tall ship through and lower them again. A hydraulic drive works against the leaf and counterweight torque, the clearance geometry tells you the angle each ship needs, and a queue model counts the road delay. Educational model, simplified.