Business Green: Engineering giant General Electric (GE) is poised to unveil a new lightweight carbon fibre wind turbine blade design that promises to significantly increase turbine efficiency and revolutionise blade manufacture. Wind turbines typically use glass fibre blades, but for turbines with a blade length of more than 50 metres, carbon fibre can be more cost effective because it is up to a third lighter and causes less wear on the drive shaft, gear system and tower. As a result, carbon …