Quietrevolution wind turbine

[4] Both models consist of three vertical airfoil blades, each having a helical twist of 120 degrees.

This feature spreads the torque evenly over the entire revolution, thus preventing the destructive pulsations of the straight-bladed giromill (Darrieus turbine).

The wind pushes each blade around on both the windward and leeward sides of the turbine.

[10] A public relations setback for the qr5 and original company was the poor performance of the turbine installed at Welsh government offices in Aberystwyth.

The company blamed poor siting[11][12] for the £48,000 turbine's generation of a monthly average of £5.28 worth of electricity (33 kWh) in 2012.