Engines such as automobiles and airplanes, vehicles and machines around the world are equipped with engines that generate power. Ever since the first steam engine was invented in the mid 1600's, ...

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 ...

Manufacturers from Alfa Romeo to Rolls-Royce have toyed with rotary engines; yet all but Mazda have pretty much given up. What goes around, comes around - and around, and around in the case of rotary ...