The rotary engine was an unconventional design that delivered great power for its size. Here's what's good and bad about it.

Despite being in use for more than a century, combustion engines are still way to complex and inefficient in turing fossil fuel to mechanical work. Naturally, engineers have been battling their way ...

The earliest piston engines typically had only one cylinder, and at best, produced horsepower measured in single digits. But once you have a working engine, it’s a relatively short step to adding ...

Can an internal combustion engine really run on gunpowder? The short answer is yes ... but there are lots of reasons why it's not a good idea.

You might have heard about high compression ratios, but what exactly are they, and what kind of effect do they have on an ...