1775 – David Bushnell’s small, self-propelled underwater vessel …a human-powered submarine that used screw propulsion (via hand-cranks), water ballast, and a detachable mine. Bushnell went on to serve the Continental Army as a Captain in the Corps of Sappers and Miners, and practiced medicine after the American Revolution.
Paper Model contains 22 Pages including:
approximately 422 parts with formers and joining strips.
19 construction diagrams.
Alternate parts provided for two different methods of layering the outer hull.
Optional 3-D rivets and boltheads; optional parts for clear viewports.
Degree of Difficulty: 5/5