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The world's longest wind turbine rotor blades

October 2012 News

Siemens has produced the world’s longest rotor blades at a length of 75 metres each. Transporting these Titans is an impressive logistical feat. In early August, the world’s biggest fibreglass components were transported over a distance of 320 kilometres across Denmark, where the blades will be installed in the first prototype of a 6-megawatt wind turbine.

A crucial factor affecting the energy yield of a wind turbine, besides air density and wind speed, is the rotor swept area over which the wind flows. The Siemens rotor consisting of three 75-metre rotor blades has a diameter of 154 metres and covers a surface area of approximately 18 600 square metres, equal to about two and a half football fields.



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