A W12 engine is a twelve-cylinder piston engine in which either three banks of four cylinders, or four banks of three cylinders are arranged in a W configuration around a common crankshaft. W12 engines with three banks of four cylinders were used in several aircraft engines from 1917 until the 1930s.
A W12 engine is a twelve-cylinder piston engine in which either three banks of four cylinders, or four banks of three cylinders are arranged in a W configuration around a common crankshaft. W12 engines with three banks of four cylinders were used in several aircraft engines from 1917 until the 1930s.
Source: Wikipedia "W12 engine" · CC BY-SA 4.0
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