20 years ago, I built a 90 size all aluminum tig welded air-boat, It had a pusher mounted heli engine, steering via twin aluminum rudders. I beat the heck out of it and it just kept coming back for more. You could run it at speed right out of the water, up the stoney beach then down the asphalt road, it sounded like someone was dragging a large metal garbage can behind a car. It had two runners on the bottom that took most of the wear and gave it directionality (slide control) when on the water. One thing I could never do was use full throttle on the water or it would blow over, and if you were near top speed, you could not chop power or it would also blow over. I think it was in the 40 mph neighborhood where this would happen.

I sold the slightly dented, greatly bottom scratched toy at a swap meet several years ago, I'm sure it's sill around somewhere.