I would like to buy one of these, but don't know the price, nor the performance characteristics. What are the payback figures for a spiralairfoil? I the minimum airspeed really 1.5 mph when it is actually generating electricity? What is the maximum windspeed it will tolerate, and what happens ...
I would like to buy one of these, but don't know the price, nor the performance characteristics. What are the payback figures for a spiralairfoil? I the minimum airspeed really 1.5 mph when it is actually generating electricity? What is the maximum windspeed it will tolerate, and what happens ...