Revenues in the wind industry slumped by almost a quarter in the space of a year, according to earnings figures from six leading firms. Analysis by Windpower Monthly of the latest results published by turbine suppliers Vestas, Nordex, Gamesa, Suzlon and Siemens, along with gearbox manufacturer Hansen, reveals a collective drop in revenues from EUR8.77 billion between January and June (H1) 2009 to EUR6.59 billion in the same period in 2010 – a decline of 23.9%. To allow for the . . .