30 Jul '12, 5pm

Impressive Beast! World's Longest Wind Turbine Rotor Blade Measures 246 Feet!

Impressive Beast! World's Longest Wind Turbine Rotor Blade Measures 246 Feet!

A single of these giant wind turbine blades produced by German manufactuer Siemens is almost as big as the wingspan of an Airbus A380, the world's largest airliner. At 75 meters (246 feet), this massive beast is destined for a prototype 6-megawatt turbine to be erected at Denmark's Østerild test station. This arms' race in wind turbine size is due to the simple fact that as turbine blades get longer, the amount of electricity produced increases exponentially - it's all about the surface area covered by the rotor - and as more offshore projects are built, it makes more sense to build fewer big turbines than lots of small ones to control costs. © Siemens Siemens writes: "As it moves, each rotor covers 18,600 square meters, which is the size of two and a half soccer fields. The tips of the blades move at up to 80 meters per second, or 290 kilometers per hour. The huge rotor w...

Full article: http://www.treehugger.com/renewable-energy/worlds-longest...

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