IN RECENT YEARS the manufacture of blades for wind generators has undergone a revolution, because it had been. 20 years in the past lengths of 40 metres or so had been an achievement. Thanks largely to lighter and stronger carbon-fibre composites, the state-of-the-art is now triple that. As turbine output is proportional to the sq. of blade size, this has additionally elevated how a lot energy might be produced. The largest generators in 2004 might generate about two megawatts. Right this moment’s giants can exceed 15.
