Water turbines : 9781155506128 : 115550612X : Source: Wikipedia. Pages: 27. Chapters: Cross-flow turbine, Francis turbine, Gorlov helical turbine, Gravitation water vortex power plant, Jonval turbine, Kaplan turbine, Pelton wheel, Reverse overshot water-wheel, Segner wheel, Shrouded tidal turbine, Turgo turbine, Tyson turbine, Water turbine, Water wheel. Excerpt: A water wheel is a machine for converting the energy of free-flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a large wooden or metal wheel, with a number of blades or buckets arranged on the outside rim forming the driving surface. Most commonly, the wheel is mounted vertically on a horizontal axle, but the tub or Norse wheel is mounted horizontally on a vertical shaft. Vertical wheels can transmit power either through the axle or via a ring gear and typically drive belts or gears; horizontal wheels usually directly drive their load. Water wheels were still in commercial use