Stationary engine

A stationary engine is an engine whose framework does not move, used to drive a piece of immobile equipment, such as a pump, generator, or mill or factory machinery. The term usually refers to large immobile reciprocating engines, principally stationary steam engines and, to some extent, stationary internal combustion engines. Other large immobile power sources, such as steam turbines, gas turbines, and large electric motors, are categorized separately.