Wankel rotors of 13B The 13B would be the most widely created rotary engine. It absolutely was the basis for all foreseeable future Mazda Wankel engines, and was manufactured for more than 30 a long time. The 13B has no relation for the 13A. Alternatively, This is a lengthened Variation of the 12A, getting eighty mm (3.The most prominent 4-rotor e