Bugatti YouYou
Design: Ettore Bugatti
Build: Jack Livesey, UK
LOD: 11ft (3.3m)
Power: Lynch 2.5kW electric motor
The great Bugatti is obviously better known for his cars, so his little Bugatti YouYou river craft, of which an unknown number were built from 1946-7, were forgotten, until Jack Livesey on the upper Thames built an amazing four new replicas. What looks like the tiny inboard Bugatti engine mounted in the bows actually conceals an electric motor, good for four knots. Which is plenty for pottering gently on the rivers.
DISPLACEMENT
Displacement craft are the oldest of all vessels, dating back to when man first sat astride a log. The maximum speed of a displacement vessel is limited by its wave-making: at maximum displacement speed its transverse wave length will equal that of its waterline with a crest at the bow and a crest at the stern. To increase its speed it needs to increase the wave length but is unable to push the stern wave further aft and is locked in the trough between the crests. This
