In the late 1960s, a Japanese automaker took a bold leap with an unconventional engine that defied traditional design.

I have already written about LiquidPiston and its XTS-210, but Avadi's idea is even more striking: it is a reciprocating engine that works as a rotary. Imagine an ICE with a single piston.

In the end, emerging rotary technology was simply not as viable as implementing restrictions on the well-understood piston engine during such a critical and delicate time period in automotive history.

The engine is the heart of any car. Check out which car brands have earned a reputation for building the most reliable ...

The U.S. Army is no stranger to flying Schweizer products. The S-300 family of helicopters were derived from the Hughes 269, ...

As the piston moves back up the cylinder ... One example is Mazda with its Renesis rotary engine. This lives under the hood of its 2004-2011 RX-8 sports car, and due to an abnormal amount of failures, ...

Ken Jones bought a bike from an Oregon dealership, then found a second one for free this month in Torrington. Another miracle: he got it started.

The last-ever V12 Vantage wasn't as good to drive as its predecessor, but it was spectacular enough in other ways ...