Mechanism for the motions of a small boat
A wheel-and-worm-screw drive shown above two views of a boat hull.
Headed by the note 'Motions of the little boat', the sheet works out a mechanical drive for a small craft. A large horizontal disc or paddle-wheel sits at the top, geared to a worm-screw and cranked frame beneath it, and the same wheel is repeated lower down over two studies of a rounded hull, one in profile and one seen from above or below. The drawing is a study of how to propel a boat by a turning wheel.
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Wheel-and-screw drive for a boat
A broad disc or paddle-wheel is mounted horizontally over a worm-screw geared to an upright, cranked frame. Below, the same wheel reappears above two studies of a rounded boat hull, drawn in profile and in plan, so that the turning wheel would drive the craft through the water.
Study of the boat's motion
The heading 'Motions of the little boat' frames the drawing as an inquiry into how the vessel moves once driven. The paired hull views, one from the side and one from the end, examine the craft's form in relation to the driving wheel above it.