-
Gristmill
Centuries ago, windmills usually were used to mill grain, pump water, or both. Thus they often were gristmills, windpumps, or both.[3] The majority of modern windmills take the form of wind turbines used to generate electricity, or windpumps used to pump water, either for land drainage or to extract groundwater. -
Wind Pumps
A windpump is a type of windmill which is used for pumping water. -
The orgin of the wind mill
The earliest known wind powered grain mills and water pumps were used by the Persians in A.D. 500-900 and by the Chinese in A.D. 1200. The first windmill manufactured in the United States was designed by Daniel Halladay, who began inventing windmills in 1854 in his Connecticut machine shop. -
Magnetic Levitation
A Japanese magnetic levitation train has broken its own world speed record, hitting 603km/h (374mph) in a test run near Mount Fuji. The train beat the 590km/h speed it had set last week in another test. Maglev trains use electrically charged magnets to lift and move carriages above the rail tracks. -
Jet Engine
An engine using jet propulsion for forward thrust, mainly used for aircraft. -
Bladeless windmill
Wind power has become a legitimate source of energy over the past few decades as larger, more efficient turbine designs have produced ever-increasing amounts of power. But even though the industry saw a record $99.5 billion global investment in 2014, turbine growth may be reaching its limits
