Three Cylinder Engines

—In steam engineering, these may be divided into two| main cla es, those in which the cylinders are placed at an angle of 120° to each other, and those in which they are ranged side by side. The pistons of three cylinder engines being in equilibrium, there is no | balancing of reciprocating es required, and they can be run at a much higher speed and steadier than engines of the ordinary reciprocating type. Hence, they are employed for driving dynamos, centrifugal pumps, circulating pumps, and high speed machinery, generally. The foregoing relates to engines having three high pre uce cylinders of equal size, and does not apply to a three cylinder triple expansion engine with respect to the balancing features.