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 ...

If you’re running an army, chances are good that you need a lot of portable power for everything from communications to weapons control systems. When it comes to your generators, every ounce counts.

When people say rotary engine, they usually mean Wankel. Mazda put it in some of their coolest cars, and recently in the MX-30 REV, though there it does the most humiliating job ever: it's a range ...