Not seen that before. It's an interesting design, but may present some challenges in manufacturing and reliability. A normal rotor has some issues, but it's probably pretty reliable as it's old technology.
We can learn a lot from nature. Those designs have stood the test of time.
Indeed we can. I wonder if this will be a success. There is not much data so far, but it looks promising ;) Thanks for the feedback.
There are lots of people working on new designs. Some places could get a lot of their energy from wind, but we've had issues in the UK with where they put the turbines. There are some fairly near us and I think they look great. I know people say they kill birds, but so do cars, cats and buildings.