hummingbird3d,
Usually called a land-sailer or land yacht(sp) and there are quite a few different models. Their biggest 'draw-back' is finding a large enough, empty, parking lot to run them (at least for me, where I live, and the particular one that I have). They are sail/wind powered which is really the only thing they have in common with sailboats. Land sailing is much faster, not as much friction as in water. You do have to be able to control the sail, just like a sailboat, but it isn't exactly the same thing (terrible way to put it, but I'm not sure how else to say it). Try it, you might like it.
- 'Doc