Both of those vehicles do work, the horse shoe shaped wing works the same as a sail on a sail boat, taking a cross wind and using it to go forward, around 3 times the forward speed of the cross wind, I have the Popular Mechanics magazine some where that talked about the design, it's also in the book by
Michael Hackleman, The New Electric Vehicles.
Apparently after the creator of that car died (old age and health problems) his design got tied up in his estate, or so I hear.
If anyone would like to read more about the pushed by the wind faster then the wind car, there is at least one other thread that was started a few years back that does a wonderful job explaining how it works with links to videos showing that it does work, I was skeptical at first as well.