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Stealth-Mode Wind Turbines

from Technology Review

Last month Danish wind turbine company Vestas and U.K. defense contractor QinetiQ demonstrated the first "stealth" wind-turbine blade--their solution to the aviation radar interference problem holding up the installation of gigawatts-worth of proposed wind farms worldwide.

Vestas composites specialist Steve Appleton says the firm is eager to test a complete stealth turbine and begin limited production by the end of 2010. "Clearly this technology, if proven fully and then adopted by Vestas, would give us a competitive advantage," says Appleton.

Lingering doubts over how stealthy turbines can be, especially when it comes to long-range military radars, are prompting continued research on alternate solutions. Just last month the U.K. government launched an $8.5 million research project with Calgary-based radar system maker Raytheon Canada to make existing air-traffic control systems capable of recognizing and discounting the radar signature from a wind farm.

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