Editing Stationary steam engine (section)

==Types of stationary steam engine==
[[Image:Steam engine in action.gif|thumb|right|Double-acting horizontal stationary steam engine. The [[piston]] is on the left, the [[Crank (mechanism)|crank]] is mounted on the flywheel axle on the right.]]
[[File:Mill engine, Queen Street Mill - geograph.org.uk - 1177536.jpg|thumb|Mill engine, Queen Street Mill, [[Burnley]]. William Roberts horizontal tandem compound engine - 'Peace'. ]]
[[File:Marshall undertype steam engine, Fengate Farm - geograph.org.uk - 1193829.jpg|right|thumb|Marshall undertype steam engine]]
There are different patterns of stationary steam engines, distinguished by
the layout of the [[Cylinder (engine)|cylinders]] and [[crankshaft]]:
*[[Beam engine]]s have a rocking [[Beam (structure)|beam]] providing the connection between the vertical cylinder and crankshaft.
*[[Table engine]]s have the [[crosshead]] above the vertical cylinder and the crankshaft below.
*Horizontal engines have a horizontal cylinder.
*Vertical engines have a vertical cylinder.
*Inclined engines have an inclined cylinder.
*Undertype engines are distinguished by having a locomotive-style [[Fire-tube boiler|boiler]] over top of a horizontal engine. 

Stationary engines may be classified by secondary characteristics as well:
*[[High-speed steam engine|High-speed engine]]s are distinguished by fast-acting valves.
*[[Corliss steam engine|Corliss engine]]s are distinguished by special rotary [[valve gear]].
*[[Uniflow steam engine|Uniflow engine]]s have admission valves at the cylinder heads and exhaust ports at the midpoint.

When stationary engines had multiple cylinders, they could be classified as:
*Simple engines, with multiple identical cylinders operating on a common crankshaft.
*[[Compound steam engine|Compound]] engines which use the exhaust from high-pressure cylinders to power low-pressure cylinders.

An engine could be run in simple or condensing mode:
* Simple mode meant the [[exhaust gas]] left the cylinder and passed straight into the atmosphere
* In condensing mode, the steam was cooled in a separate cylinder, and changed from vapour to liquid water, creating a vacuum that assisted with the motion. This could be done with a water-cooled plate that acted as a [[heat sink]], or pumping-in a spray of water.

Stationary engines may also be classified by their application:
*Pumping engines are found in [[pumping station]]s.
*Mill engines to power [[Cotton mill|textile mill]]s
*[[Winding engine]]s power various types of [[hoist (device)|hoist]]s.
*[[Refrigeration]] engines are typically coupled to ammonia compressors.

Stationary engines could be classified by the manufacturer
*[[Boulton & Watt]]
*[[George Saxon & Co]]
{{Clear}}
[[File:Coldharbour Mill - beam engine - geograph.org.uk - 2204582.jpg|thumb|325px|The restored [[Peter Brotherhood|Kittoe and Brotherhood]] beam engine at [[Coldharbour Mill Working Wool Museum|Coldharbour]], which is steamed up regularly on Bank Holiday weekends.]]