Mazda's five-decade-long, largely futile efforts on behalf of the rotary engine demonstrate ... It's the Achates opposed-piston (OP) engine, a prototype of which was shown in a Ford F-150 pickup ...

Production cars have come a long way since the invention of the combustion engine, and car manufacturers have always sought to innovate and push the limits of what is possible. An area of ...

I love weird engines—give me a rotary, a turbine ... Spain had produced a opposed-piston engine that packed a pretty powerful punch in an extremely tiny package. There’s no cylinder head ...

Some are promising, one is not. The Napier is a complicated extrapolation of a basic opposed-piston engine. Your average “engine” has cylinders and pistons lined up with a cylinder head on top ...

Although Mazda carried the banner for rotary engines through the latter part of the 20th Century, its cars were far from the only notable ones to use Wankel's design. Still, it would be impossible ...

It was allegedly designed to propel a Soviet-era torpedo and was fueled by hydrogen peroxide as opposed ... radial piston aircraft engines under license. It allegedly produced rotary engines ...

The free piston engine, a design with opposed pistons working against compressed air springs and combining both compression and firing strokes in a single axis, doesn’t turn anything in itself ...

Ferrari continues to explore hydrogen-powered drivetrain solutions, patent documents discovered by AutoGuide.com indicate Ferrari is looking at a two-stroke 3- or 6-cylinder opposed piston engine ...