Propulsion for human-powered boats occurs via rowing, and wind-powered ships use sails. Internal combustion-engined boats work in one of two ways. They can use a propeller or a jet drive. So what’s ...
But what would make me happy would be a machine like Grind Hard Plumbing Co's tiny jet boat. Of all their experiments, this is the one that hit me the hardest. They've been working on it for two ...