Worlds first large 10 kw 3 bladed helical vertical axis wind turbine 361-444-3711
2012-08-01 16 Dailymotion
Worlds first large 10 kw 3 bladed helical vertical axis wind turbine <br />Affordable Wind Turbines <br />361-444-3711 <br />http://www.affordablewindturbines.org