This structure was Employed in the Junkers Jumo 205 diesel aircraft engine, utilizing two crankshafts at either close of an individual bank of cylinders, and most remarkably in the Napier Deltic diesel engines. These employed 3 crankshafts to serve three banking institutions of double-ended cylinders organized within an equilateral triangle https://creopt.com/empowering-connections-the-dynamics-of-mentor-matching-engines/