VAWT (Vertical Axis Wind Turbine) Calculator.
http://www.poormanguides.iblogger.org/VAWT.html
Just getting ready for my new book about making your own VAWT from easy to find parts for cheap. It will include grid tie with an AC induction motor, or you can use a DC motor or even a car alternator to charge batteries.
آی-ویدئو