Manufacturer sought for new Swiss blade design

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Swiss technology company Blatec Blade Technologies is looking for a turbine manufacturer to work with it to adapt its Blatec blade design now that the concept development stage has been completed. The aim, says the company's Ferdinand Lutz, is to improve turbine profitability through a number of blade features including a weight which is 50% less than most existing blades and "blade segmentation with final assembly at the site of installation, which will substantially ease transportation." The company says this will be especially important in Asian markets. The carbon fibre reinforced plastic blade beam is highly loaded and stiff and the ribs can be manufactured from a variety of materials, but Blatec currently favours a light and strong sheet-metal box design. In addition, the blade is covered by a thick glass fibre reinforced flexible foil providing a smooth surface without any requirement for grinding. "The basic design at first appears to be conservative, with the blade consisting of a beam, shaped ribs and a foil skin," says Lutz. But the difference compared with established design concepts for rotor blades "could hardly be bigger," he insists.

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