Wankel rotors of 13B The 13B is definitely the most generally produced rotary engine. It had been The idea for all foreseeable future Mazda Wankel engines, and was made for more than 30 decades. The 13B has no relation for the 13A. Alternatively, it is a lengthened Variation of your 12A, acquiring 80 mm (three.In 1974, a brand new method was utili