The Seawind design picks up from technology developed by US space agency NASA from the 1980s, abandoned when oil prices fell and superseded by the three-blade designs pioneered in Denmark.
Launched at the WindEurope and RenewableUK trade show in London (6-8 June), the upwind turbine has a rotor diameter of 126 metres, but, according to CEO Martin Jakubowski, there is ample room to scale up to a rated capacity of 10MW and a 160-metre rotor diameter.
A concrete gravity-based foundation, capable of operating in water depths of up to 50 metres, is part of the package, although floating foundations could be used in later developments.