Radial Engines
In a radial engine, cylinders are arranged radially in a circle. Simple radials use one row (i.e. one circle) of cylinders. Larger radials use two rows, or even four. Most radials are air-cooled with separate cylinders and so there are no banks as such. Most radials also have odd numbers of cylinders in each row and stagger these between successive rows, for better cooling.
A few rare radial engines, such as the Armstrong Siddeley Deerhound and the Zvezda M503 (illustrated) have arranged their multiple rows so as to align their cylinders into banks.
Read more about this topic: Cylinder Bank
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