Nacelle

•  Anemometer

  An anemometer is a device for measuring the wind speed, and is one instrument used in a weather station. The term is derived from the Greek word anemos, meaning wind. The first known description of an anemometer was given by Leon Battista Alberti in around 1450.

  

  33.3%
  

  33.3%
  

  33.3%
  
•  Lift (force)

  A fluid flowing past the surface of a body exerts a force on it. Lift is defined to be the component of this force that is perpendicular to the flow direction. It contrasts with the drag force, which is defined to be the component of the fluid-dynamic force parallel to the flow direction.

  

  16.7%
  

  33.3%
  

  50.0%
  
•  Wind generator

  A wind generator is a device that generates electrical power from wind energy. Wind generators have traditionally been wind turbines, i.e. a propeller attached to an electric generator attached to appropriate electronics to attach it to the electrical grid or to charge batteries. Recently, however, a reciprocating non-turbine wind generator, the Windbelt, has been invented. It promises to reduce the cost for generating small amounts of power tenfold.

  

  25.0%
  

  12.5%
  

  62.5%
  
•  Windmill

  A windmill is a machine which converts the energy of wind to rotational motion by means of adjustable vanes called sails. The main use is for a grinding mill powered by the wind, reducing a solid or coarse substance into pulp or minute grains, by crushing, grinding, or pressing. Windmills have also provided energy to sawmills, paper mills, hammermills, and windpumps for obtaining fresh water from underground or for drainage (especially of land below sea level).

  

  50.0%
  

  50.0%
  

  0.0%
  
•  Wind speed

  Wind speed is the speed of wind, the movement of air or other gases in an atmosphere. It is a scalar quantity, the magnitude of the vector of motion. Wind speed has always meant the movement of air in an outside environment, but the speed of air movement inside is important in many areas, including weather forecasting, aircraft and maritime operations, building and civil engineering.

  

  0.0%
  

  0.0%
  

  0.0%
  
•  Wind power

  Wind power is the conversion of wind energy into a useful form of energy, such as using wind turbines to make electricity, wind mills for mechanical power, wind pumps for pumping water or drainage, or sails to propel ships. At the end of 2009, worldwide nameplate capacity of wind-powered generators was 159.2 gigawatts (GW).. Energy production was 340 TWh, which is about 2% of worldwide electricity usage; and is growing rapidly, having doubled in the past three years.

  

  0.0%
  

  0.0%
  

  0.0%
  
•  Lift-to-drag ratio

  In aerodynamics, the lift-to-drag ratio, or L/D ratio ("ell-over-dee" in the US, "ell-dee" in the UK), is the amount of lift generated by a wing or vehicle, divided by the drag it creates by moving through the air. A higher or more favorable L/D ratio is typically one of the major goals in aircraft design; since a particular aircraft's required lift is set by its weight, delivering that lift with lower drag leads directly to better fuel economy, climb performance, and glide ratio.

  

  50.0%
  

  50.0%
  

  0.0%
  
•  Blade element theory

  Blade element theory (BET) is a mathematical process originally designed by William Froude (1878), David W. Taylor (1893) and Stefan Drzewiecki to determine the behavior of propellers. It involves breaking a blade down into several small parts then determining the forces on each of these small blade elements. These forces are then integrated along the entire blade and over one rotor revolution in order to obtain the forces and moments produced by the entire propeller or rotor.

  

  0.0%
  

  100.0%
  

  0.0%
  
•  Wind farm

  A wind farm is a group of wind turbines in the same location used for production of electric power. Individual turbines are interconnected with a medium voltage (usually 34.5 kV) power collection system and communications network. At a substation, this medium-voltage electrical current is increased in voltage with a transformer for connection to the high voltage transmission system. Spain, Denmark, and Germany are Europe's main wind energy producers.

  

  100.0%
  

  0.0%
  

  0.0%
  
•  Guy-wire

  A guy-wire or guy-rope is a tensioned cable designed to add stability to structures. One end of the cable is attached to the structure, and the other is anchored to the ground at a distance from the structure's base. They are often configured radially (equally spaced about the structure) in trios, quads (pairs of pairs) or other sets. This allows the tension of each guy-wire to offset the others. For example, roof antennas are sometimes held up by three guy-wires.

  

  0.0%
  

  0.0%
  

  0.0%
  

• Wind power by likeorhate

Register now, and make your vote count more!

•  210 BC

  

  0.0%
  

  0.0%
  

  100.0%
  
•  Firebird (Slavic folklore)

  In Slavic folklore, the Firebird is a magical glowing bird from a faraway land, which is both a blessing and a bringer of doom to its captor. The Firebird is described as a large bird with majestic plumage that glows brightly emitting red, orange, and yellow light, like a bonfire that is just past the turbulent flame. The feathers do not cease glowing if removed, and one feather can light a large room if not concealed.

  

  0.0%
  

  0.0%
  

  0.0%
  
•  Lithostratigraphy

  Lithostratigraphy is a sub-discipline of stratigraphy, the geological science associated with the study of strata or rock layers. Major focuses include geochronology, comparative geology, and petrology. In general a stratum will be primarily igneous or sedimentary relating to how the rock was formed. Sedimentary layers are laid down by deposition of sediment associated with weathering processes, decaying organic matters (biogenic) or through chemical precipitation.

  

  0.0%
  

  0.0%
  

  0.0%
  
•  Margaret Fishback

  Margaret Fishback, later Margaret Fishback Antolini (March 10 1900 – September 25 1985), was a relatively well-published American poet and prose author from the late 1920s until the 1960s. Born in Washington, DC, she earned a degree from Goucher College before joining Macy's as a divisional advertising copywriter in 1926. During the 1930s she was reputed to be the world's highest-paid female advertising copywriter.

  

  0.0%
  

  0.0%
  

  0.0%
  
•  Majda Širca Ravnikar

  

  0.0%
  

  100.0%
  

  0.0%