NEW DELHI, March 7 (Reuters) - India has signed a $248 million contract with Russian state arms exporter Rosoboronexport to acquire more powerful engines for its Soviet-era battle tanks ...

The second patent is a start-stop system for a rotary engine. Due to the engine’s pistonless layout and lack of valvetrain, it’s understood this has always been a challenge to engineer.

The world’s first oblique detonation engine (ODE) powered by standard aviation kerosene has been successfully tested by Chinese scientists, marking a potential game-changer in hypersonic ...