Steam Locomotive Fire Tube Firebox

Title

Steam Locomotive Fire Tube Firebox

Artist

Gary Keesler

Medium

Photograph - Digital Art Photography

Description

Steam Locomotive Fire Tube Firebox such this located in Illinois Central Railroad Eng, No. 790 is a perfect illustration.

In the standard steam locomotive fire tube type boiler, the firebox is surrounded by water space on five sides.

The bottom of the firebox is open to atmospheric pressure, but covered by fire grates (solid fuel) or a firing pan (liquid fuel).

If the engine burns solid fuel, like wood or coal, there is a grate covering most of the bottom of the firebox to hold the fire.

An ash pan, mounted underneath the firebox and below the grates, catches and collects hot embers, ashes, and other solid combustion waste as it falls through the grates.

In a coal-burning locomotive, the grates may be shaken to clean dead ash from the bottom of the fire.

They are shaken either manually or (in larger locomotives) by a powered grate shaker.

Wood burning locomotives have fixed grates that can't be shaken.

Wood ash is generally powder which will fall through the grates with no more agitation required than the vibrations of the locomotive rolling down the track.

The fire grates must be replaced periodically due to the extreme heat they must endure.

Combustion air enters through the bottom of the firebox and airflow is usually controlled by damper doors above the ash collection pocket of the ash pan.

Dampers control air flow to the oil fire.

Illinois Central Railroad Eng, No. 790 is a preserved steam locomotive, the only 2-8-0 Consolidation type of its class to survive into the diesel age of train transportation.

It is part of the Steamtown National Historic Site collection in Scranton, Pennsylvania.

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Uploaded

September 1st, 2014

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