In the early 1970s, Spanish inventor Arturo Estévez Varela introduced a pioneering engine powered by water — a concept that held the potential to revolutionize automotive technology. Despite its ...

In a surprising turn of events, the automotive world has been rocked by Toyota’s announcement of a new engine technology that could challenge the dominance of electric vehicles. The CEO of Toyota has ...

Astron aerospace has shown a partial prototype of a new rotary combustion engine it claims runs at an extraordinary 60% thermal efficiency, burning totally clean with zero NOx emissions and nothing ...

Air engines are a common occurrence here on Hackaday. They’re relatively novel and reasonably easy to 3D print without requiring any fluids or supporting machinery. For example, [Tom Stanton] took a ...