From the Guardian – Radical vertical turbine aims to take wind power to towns and cities

The new turbine is designed to be used in urban areas where the wind direction changes constantly. The new turbines triple helix form and vertical axis make it almost silent. The new turbine is called Quiet Revolution and is being installed in the next couple of months at 3 sites in the UK.

“Named Quiet Revolution, the turbine is about five metres in length without a pole, and the designers claim it can produce 10,000kWh a year on an average wind speed of 5.8 metres a second. The company claims this would provide electricity for perhaps five energy-efficient homes. The combined cost and installation charge for a 6kW turbine would be about £28,000.”

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