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How the rotary engine works — and why it’s so different

Pop the hood on a classic Mazda RX-7 or RX-8 and the engine bay looks oddly empty. That is the charm of the rotary engine: a compact lump of metal that trades pistons and valves for a spinning ...

Yes, there is a 12-rotor engine — here's how much HP it's trying to push

Could there possibly be a rotary engine with 12 rotors? The answer is yes, and here's everything we know about it including ...
Jalopnik

Why Mazda Built The Three-Rotor 20B Engine (And Used It Just Once)

Mazda made a splash in the market in 1990, launching the Eunos Cosmo with the three-rotor 20B engine. Compared with contemporary Wankel rotary engines, the 20B's extra rotor beefed the compact ...