Rim-driven thrusters turn the normal propeller-motor arrangement inside out; rather than mounting the motor at the center of the propeller, they use a large hollow motor, with the blades attached to ...

The Caproni Campini N.1 was Italy’s bold attempt to enter the jet age before true turbojets were ready, using a piston engine to drive a compressor in a motorjet layout. It became one of the earliest ...

PBS Aerospace's TJ40-G2 turbojet engine, designed for unmanned aircraft, produces about 425 N of thrust and features an integrated generator. (PBS Aerospace) PBS Aerospace, the US subsidiary of ...

Most boat builds start with a hull shape and work outward. This one started with a Russian supersonic fighter jet and worked ...