According to Leonardo’s calculations - leaving aside all mechanical and nautical difficulties -, with a driving wheel making 50 rpm the boat would have sailed at 50 miles per hour.

THE GALATA BRIDGE
This model was made from the indications drawn from a very small drawing by Leonardo included in the Leicester manuscript. The drawing shows a plan and an elevation view of the bridge, which has a single span approximately 240 metres in length, 23 metres in width, with a peak height of 40 metres above the level of water. A unique feature is the double supporting structure at the head of the bridge shaped like the tail of a sparrow for the purpose of better bearing transversal thrust. A feature worthy of notice is the sketch of a masted ship, smoothly sailing under the central span of the bridge. WEBBED GLOVE
These gloves are designed for tying around the wrist. They are easy to wear and are probably made in leather with five wooden ribs to stiffen them out and make them resemble the feet of web-footed birds. These gloves are components of outfits designed for moving more smoothly in water. Work Machines

AUTO-FEED HYDRAULIC SAW
This model was reconstructed from a drawing illustrating an auto-feed water-powered saw. The hydraulic saw transmits alternating motion in quick succession to the blade and the carriage for holding the tree trunks. TEMPORARY BRIDGE ON TRESTLES
This machine belongs to Leonardo’s studies for the construction of temporary military bridges by means of tree trunks roped to each other. Leonardo explains how to arrange the trunks and to fasten them at an equal distance from one another. He also mentions the materials to use and reveals the tricks of the trade. The credentials Leonardo presented to the Duke of Milan, Ludovico il Moro, included this bridge and others of different kinds. BILGE PUMP
This machine was intended for pumping water out a galley’s bilge. The conical valve featuring in the pump was probably devised by Leonardo for a study of a water-fall bellows for smithies or foundries. REVOLVING BRIDGE
This is a model of one of the many "very light yet rugged" bridges. These bridges were designed for construction with material that was readily available and easy to transport. The bridge with a parabolic profile has only one span and is secured to the two banks by means of a large vertical pin. It is moved by means of ropes and hoists, aided by wheels and metal rollers in performing its sliding motion. Moreover, the bridge is equipped with a counterweight tank for balancing and manoeuvring purposes, while suspended in the air before being laid down on the opposite bank. DEEP - SEA DIVING SUIT
In Leonardo’s day, systems for working at a deep level underwater were already being studied. Leonardo devised a leather diving suit.