The U.S. Army’s M1 Abrams main battle tank draws its power not from a conventional diesel engine but from the Honeywell ...

It's been quite some time since we first covered the exploits of a company called LiquidPiston, and given what we've learned since then, we were quite anxious to find out what these guys are up to ...

Screenshot from social media post of Ukrainian volunteers assembling a small cruise missile with a pulsating Trembita engine. Its task is to destroy objects and exhaust the enemy’s anti-aircraft ...