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 ...

The Wankel rotary engine is an engineer's dream. Smaller, lighter and simpler than any piston engine, the spinning-triangle design can crank out major power from a tiny package with a minimum of ...

In theory, Wankel-style rotary internal combustion engines have many advantages: they ditch the cumbersome crankcase and piston design, replacing it with a simple, single-chamber design and a thick, ...

Imagine triangles spinning around a shower curtain rod inside a beer keg—that is an elemental description of the screaming Wankel rotary engine. This powerplant is beloved by gearheads the world over ...

Rotary engines are already known for their high RPM; the smaller they get, the higher they tend to rev. So what happens when the world’s smallest rotary engine gets put to the test? Well, 30,000 RPM ...

The rotary engine, once heralded as a revolutionary alternative to traditional piston engines, has experienced a tumultuous journey through the annals of automotive history. Despite its decline in ...

A Wankel engine is a type of rotary engine, but not all rotary engines are Wankel engines. Wrapping your mind around this idea will help you to better understand the similarities as well as the ...

The rotary engine is unique in its success and failure and its ability to make an impact with a completely different way of thinking. As it is, every production car for the last 130 years, aside from ...

It rose to prominence in the Mazda RX-7 model line, but the last new car feature one was the Mazda RX-8. Since then, Mazda has been continually developing the technology with the aim of bringing it ...

The rumor is now a fact: Mazda announced today that it would bring back the legendary rotary engine, though not as the main powerplant of a car. Instead, a version of the rotary will act as a range ...

It seems like we've been waiting forever for Mazda to come out with a new rotary engine. The last production car to use the unique powerplant was the RX-8, and that car was cancelled all the way back ...