One way to describe it in words is that it's like a normal wind turbine, but instead of 3 blades, you have one wing that moves in a circle like a blade. And in

One way to describe it in words is that it's like a normal wind turbine, but instead of 3 blades, you have one wing that moves in a circle like a blade. And instead of the energy being extracted by a generator where the 3 blades meet, the energy is extracted at the wing itself, by many small turbines.