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 ...

Everyone generally knows about piston and rotary engines, with many a flamewar having been waged over the pros and cons of each design. The “correct” answer is thus to combine both into a single ...

The RX-7 sits at the center of Mazda lore. Light, sharp, and fearless, it taught a generation that a small rotary can punch above its size. After years of hints, Mazda now points to a follow-up for ...

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, ...

The Mazda RX-8's unique rotary engine and analog driving experience are attracting new enthusiasts. Prices start at $5,000 ...

Like adding microtextures to plastics, the rotary valve idea in the RevForce design could potentially be an industry game-changer. Traditional Two-Stroke Engine Issues A traditional two-stroke engine ...

Wankel rotary engines, typically but not exclusively found in Mazdas, certainly lean on the "quirkier" side of modern powertrain systems, made quirkier because most rotary-powered cars on the road ...

Alina has been enthusiastic about vehicles her entire life, and even from an early age found herself itching to get behind the wheel. Through high school and college, she could be found reading ...

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 ...