SS Archimedes, model steam boat by William Mowll

Screw propulsion was invented by Francis Pettit Smith, who built the first screw-driven steamship, the 232-ton SS Archimedes, in 1839 to demonstrate his invention. His design was compromised by low steam pressure. William Mowll's 1/24 scale model, using a 3D-printed Archimedes screw propeller, shows how the Archimedes could have performed with modern steam power.