This setup is an interesting idea, if nothing else. Looks like it would have a lot of blade area to work with. Maybe use two fins on the sides to direct wind from sides onto the back blades as they come down?
Anyway, at least it's something different to look at and consider.
And then the flying monkeys attacked. My only defense was this tiny ad:
montana community seeking 20 people who are gardeners or want to be gardeners
