I sense a new kind of jet boat coming....maybe more akin to a "fart" boat.

The idea has a little merit, but I doubt the big car manufacturers are much intimidated.

I once had an idea (beginner's luck ) that if I used an electric outboard and attached a paddle wheel type alternator to the side of the boat, I could recharge the battery as I went. You know the perpetual motion fishing machine... ....

It doesn't work....can't create energy without expending an equal amount. Some guy named Einstein had some theories along those lines.