I think he's talking about a boat (not a hydrofoil) that can build sufficient speed to lift itself just barely out of the water to reduce the drag. I remember the military built one (full scale) as a troop transport. It was huge and had 6 massive jet engines that were mounted on a bow mounted airfoil. Don't remember much more than that.

I think with a model, being that they are so light, you'd have to walk a fine line to make it work.