Experiment (horse powered boat)
Experiment
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| History | |
|---|---|
| Name: | Experiment |
| Builder: | David Wilkinson |
| General characteristics | |
| Tonnage: | 12 |
| Length: | 100 feet (30 m) |
| Beam: | 20 feet (6.1 m) |
| Installed power: | eight horses on a treadmill contraption |
| Propulsion: | "goose-foot paddle" large mechanical screw propeller |
| Speed: | 4 knots (7.4 km/h; 4.6 mph) |
Experiment was an early nineteenth-century boat powered by horses and incorporating the then novel idea of a screw propeller.
Experiment was a horse-powered ferry boat. It was a twelve-ton three-mast boat drawing a few feet of water, about 100 feet (30 m) long by 20 feet (6.1 m) beam. Its driving mechanism, an in-water screw, was invented by David Grieve in 1801. The boat was constructed by David Wilkinson (some sources give his name as Varnum) in 1807 to 1810, depending on the source. It was propelled by a "goose-foot paddle" large mechanical screw propeller in the water (instead of a paddle wheel at water surface). The new technology devised by Grieve and Wilkinson was powered by eight horses on a treadmill. The horse boat technology to propel the boat upstream was originally invented by David Grieve and granted a patent February 24, 1801, in the patent category of "Boats to ascend rivers". The complete recorded patent was lost in the 1836 U.S. Patent Office fire. The novel idea of propelling vessels upstream by the use of a large mechanical screw in the water is now referred to as Ericsson’s propeller.
It is reported that Experiment made one unsuccessful voyage, as it ran aground on the return trip. The mechanism and associated parts were put together by Ephraim Southworth. Little thought was put into planning the construction, and it was poorly built. The maiden test voyage was in June 1809 of a group of gentlemen from the Grand Lodge of the State. The first attempt of the "Screw Boat" began at Jackson's Wharf on Eddy's Point near Providence, Rhode Island, with a destination of Pawtuxet Village. The eight horses for the "horse power", owned by Marvin Morris, were connected mechanically to a poorly designed contraption to make the boat move. It obtained a top speed of four knots with the help of a tide going in her direction and the wind on her back. It managed to get to Pawtuxet Village, where there was much celebration over its success. The return trip, however, resulted in humiliation when a gust of wind drove Experiment onto mud flats, causing its demise.
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Wikipedia