Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

Justin Cupler has been a member of the TopSpeed team since 2012. Justin's love for cars started back when he was just five years old, helping his dad work on his 1957 Chevy Bell Air and then his 1966 ...

The 1974 Mazda REPU was the world's only mass-produced rotary pickup truck, featuring a 1.3L Wankel engine with 110 hp and ...

While most people might know rotary engines for their use in cars, a pair of companies made use of them in chainsaws — and ...

The automotive world hasn’t seen a rotary engine in production since the Mazda RX-8 was axed in 2012. However, the Crighton CR700W is bringing it back in spectacular fashion in a machine billed as the ...

Mazda has been building new parts for the original MX-5 Miata for a couple of years and even offers a full restoration service over in Japan. Now it's expanding the parts program to the RX-7, ...

The engine in question was the Wankel rotary, named after German engineer Felix Wankel, who first patented the concept in 1929. Instead of pistons moving back and forth, the rotary engine used a ...

The Mazda MX-30 is a compact electric SUV with some issues. The big one is range, specifically that there isn't enough of it, as the paltry 35.5-kWh battery only offers an EPA-estimated 100 miles on a ...

Over-the-top rotary builds are an enthusiast tradition. Because so few rotary cars have been made, the limits of the engine type haven't been fully exploited by automakers. It's been tuners who have ...

You're a master of all things LS. You completely understand the Ford FE big blocks. Those Honda B16 engines are no match for your knowledge base. At their core, these engines all behave the same way.

If you’re running an army, chances are good that you need a lot of portable power for everything from communications to weapons control systems. When it comes to your generators, every ounce counts.

This file type includes high resolution graphics and schematics when applicable. Automotive engineers are concerned with weight-to-power ratios when designing vehicles. While light-weighting is a ...