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In the early 19th century, paddle wheels were the predominant way of propulsion for steam-powered boats. In the late 19th century, paddle propulsion was largely superseded by the screw propeller and other marine propulsion systems that have a higher efficiency, especially in rough or open water. Paddle wheels continue to be used by small, pedal ...
The water caterpillar boat propulsion system (Popular Science Monthly, December 1918) An early uncommon means of boat propulsion was the water caterpillar. This moved a series of paddles on chains along the bottom of the boat to propel it over the water and preceded the development of tracked vehicles. [34]
The first such ship to use the Voith Schneider propeller was the excursion boat Kempten. Two German 1935-type M class minesweepers M-1 and M-2 were fitted with VSPs. The first British ship to use Voith Schneider propellers was the double-ended Isle of Wight ferry MV Lymington , launched in 1938.
Paddle propulsion gradually gave way to the screw propeller, and the introduction of iron and later steel hulls to replace the traditional wooden hull allowed ships to grow ever larger, necessitating steam power plants that were increasingly complex and powerful.
The development of screw propulsion relied on the following technological innovations. Steam engines had to be designed with the power delivered at the bottom of the machinery, to give direct drive to the propeller shaft. A paddle steamer's engines drive a shaft that is positioned above the waterline, with the cylinders positioned below the shaft.
Experiment is important as a precursor of public transportation on rivers, and it was the forerunner of a number of horse-powered boats, chiefly ferries used for more than a half-century along the eastern seaboard of the United States. Most commonly, those were paddle wheel boats, not screw-type propellers.
In 1802, American lawyer and inventor John Stevens built a 25-foot (7.6 m) boat with a rotary steam engine coupled to a four-bladed propeller. The craft achieved a speed of 4 mph (6.4 km/h), but Stevens abandoned propellers due to the inherent danger in using the high-pressure steam engines. His subsequent vessels were paddle-wheeled boats. [15]
A few paddle steamers serve niche tourism needs as cruise boats on lakes [a] and others, such as Delta Queen, still operate on the Mississippi River. In Oregon , several replica paddle steamers , which are non-steam-powered sternwheelers built in the 1980s and later, are operated for tourism purposes on the Columbia and Willamette Rivers .
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