"No, you are not increasing the blade swing, you are increasing the collection area, by increasing the pressure at the front and decreasing the pressure behind and while it's not increasing the blade swing, it is increasing the frontal area, thus increasing the area that wind is being collected from.
Any time you keep the air from spilling over the tips of the blades you are going to increase the output, you can do this with a stationary rim, or you can do this with winglets on the tips of the blades."
When I look at the width of the ring being placed around the blades in the lab test,
(At 1 min 22 seconds into the video), it seems like they ring is only adding about 4 or 5 inches of width to edges of the frontal area..
That sure seems like a small ring, if they can actually get 2x to 3x power boost.
The total amount of sq inches of Ring, out there in the wind just seems too small to be having that kind of effect on efficiency.
But, it appears to be working..
Seems like a Spoiler..
