Back when I was a kid some 55 years ago or so, I spied a snow/ice plane (they used it on our frozen lakes) that someone had built. Simple construction...long V shaped with single ski up front and dual skis in back beneath what was probably a chainsaw motor with propeller attached. I bet that thing could really scoot along once it go going. That was back when we could count on the lakes freezing solid every winter. Not so anymore.