Build an interesting prototype, but the wind keep causing havoc with it. It only has 1 set of 4 blades.( The blades are 48" by 80" or three quarter sheets of plywood) It was a very interesting prototype that work well in medium wind. Every time there was wind of over 25MPH it suffered from some kind of failure . This last time it in pulled support cable stakes out of the ground and tip over. One set of 4 blades just don't seam to work that well, but it was the size of the blades that made this prototype so interesting.

Ronald Ackerman