Dutch Lagerwey's prototype 750 kW turbine, now being tested in Oude Tonge in the province of Zeeland, has yet to pump power into the grid. "From early June we'll start producing electricity, but our testing will go on for a few months," says the company's Remco Boersma. Once tests are complete the machine will be commissioned and handed over to its owner, regional electricity distribution company Delta. With its huge ring generator (the design has no gearbox and resembles the German Enercon machine), the Lagerwey unit stands out among the six Bonus 600 kW machines which share its site. The turbine has a rotor diameter of 45 metres and is 50 metres tall. Boersma says its similarity in appearance to the Enercon cannot be helped. Lagerwey even hired the services of an artistic designer to make it look different, though without success. On the inside, though, there are a lot of differences between the two machines, he assures. The Lagerwey, for example, has no main axle, but a crown bearing giving it greater stiffness.