Here's the process of making this rotary valve engine with a different intake and an exhaust system. It wasn't easy to start ...

These overlooked rotary-powered classics remain attainable today but may not stay affordable for much longer.

When it comes to unconventional engine design, few exceed the Wankel rotary in terms of weirdness. Despite that, the same basic principles of internal combustion apply here: Fuel and air are mixed and ...