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 the difference between them? We are on hand to explain ...

Scientists say they have designed a propeller system that can replace electrical and diesel-operated engines currently used ...

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 ...