Largest Wind Turbine Blade Unvieled

LM Glasfiber launched a gigantic new wind turbine blade, the LM 61.5 P, at the WindEnergy 2004 trade fair in Hamburg. With a rotor diameter of 126 meters, the blade is one of the biggest in the world and another development in the supersizing of wind turbines. However, due to composition of materials, new design and a new manufacturing process the company was able to reduce the weight to less than 18 tons making the new blade lighter than some of its smaller competitors.

Hamburg, Germany – June 18, 2004 [SolarAccess.com] LM Glasfiber launched a gigantic new wind turbine blade, the LM 61.5 P, at the WindEnergy 2004 trade fair in Hamburg. With a rotor diameter of 126 meters (413 ft.), the blade is one of the biggest in the world and another development in the supersizing of wind turbines. However, due to composition of materials, new design and a new manufacturing process the company was able to reduce the weight to less than 18 tons making the new blade lighter than some of its smaller competitors. “With this new design, we have again met our defined goal of constantly reducing the weight relative to the size of the new blades, thereby lowering the cost price per kilowatt hour produced”, Anders Christensen, the CEO of LM Glasfiber, said. The low weight is attributed to the use of LM’s FutureBlade technology, which has been further developed to combine fiberglass and carbon fiber in a new way. There is also the development of the SuperRoot. It is a new root concept that allows the design of blades that are about 20 percent longer than previously made without increasing the diameter of the blade root. A SuperRoot helps to create a blade and a hub that are lighter and less expensive. Carbon fiber used in the LM 61.5 P has resulted in the further development of LM Glasfiber’s lightning protection system, which is in the process of a patent application. Incorporating carbon fibers in the lightning protection system allows a lightning strike to be conducted through these fibers. In this way, the electricity conducting carbon fiber does not represent a risk in terms of lightning strikes. A new condition monitoring system, LM BladeMonitoring, combines technology within optic fibers, software and hardware, and LM Glasfiber’s blade design to constantly monitor critical conditions such as load, temperature, damage and lightning strikes. The new blade was designed for REpower Systems, which will erect the first wind turbines using the LM 61.5 P blades in northern Germany this year.

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