This project covers two recent requests. a boat/car and a rubber band ratchet mechanism to attach the band to the axle. othman alq asks "can u make a boat that can drive in the ground. How to build a recumbent pedal pontoon boat a split section of 1-inch pvc pipe fastened to the deck secures the paddle in place. mother earth news staff and weld the mechanism squarely. A rudder for the pontoon paddle boat is connected to the frame for the pontoon paddle boat by a friction connection and includes a pivot mechanism that permits folding to a position where it extends parallel to the boat..
The italian physician guido da vigevano (c. 1280−1349), planning for a new crusade, made illustrations for a paddle boat and war carriages that were propelled by manually turned compound cranks and gear wheels (center of image)..