Flippers inspire windmill innovation | Portland Press Herald
There is a new wing in town. It gets lift at higher AOAs and may even have less drag than regular wings a low AOAs.
But, one problem I see is, the nose of your car would look like a
killing machine! 
This design might not be the best choice for cars. But, it the buzz is true,
you may be seeing this saw-tooth design on your radiator fan blades before long.