The build is just a few pieces of wood, drill rod, some hardware and a prop. Definitely not the most ... but it is a nice bit of MacGyverism to build a boat motor out of spare parts.

Scientists say they have created a methodology that could replace two diesel engines powering a ferry boat with pneumatic ...

Most famous of these is probably the toroidal propeller that made waves a while ago, mostly in the field of flying drones, but commercial toroidal boat props exist too. Test results of the ...