What If The Labour Party Got Rid Of...
Politics2 mins ago
No best answer has yet been selected by boobesque. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.The vertical sort are called Savonius rotors, try a google search on this for more info.
I think for a backyard installation they are more convenient and less likely to provoke the neighbours into hatred. They are just as efficient as the fan sort, and have the advantage that they are always correctly aligned with the wind.