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A "Scotch" marine boiler (or simply Scotch boiler) is a design of steam boiler best known for its use on ships. Sectional diagram of a "wet back" boiler. The general layout is that of a squat horizontal cylinder. One or more large cylindrical furnaces are in the lower part of the boiler shell. Above this are many small-diameter fire-tubes ...
Vessels typically contained several engines for different purposes. Main, or propulsion engines are used to turn the ship's propeller and move the ship through the water. . The fire room got its name from the days when ships burned coal to heat steam to drive the steam engines or turbines; the room was where the stokers spent their days shoveling coal continuously onto the grates under the ...
The LNER then ordered a fifth batch of 13 to a modified design, incorporating reduced boiler mountings and detail differences, and these were built by the outside contractors Hawthorn, Leslie & Co. during 1925–26 (works numbers 3616–28).
The first Yarrow boilers were intended for small destroyers and filled the entire width of the hull. In the early classes, three boilers were used arranged in tandem, each with a separate funnel. The later sets supplied for capital ships used multiple boilers and these were often grouped into sets of three, sharing an uptake.
Robinson GCR design with small boiler, Belpaire firebox, steam and vacuum brakes and water scoop. O4/2, Introduced 1925. O4/3 with cabs and boiler mountings reduced. O4/3, Introduced 1917. ROD locos with steam brake only and no water scoop. O4/4, Rebuilt with O2 boiler, extended rear frames and side window cab, since rebuilt again.
A steam generator on a ship is an auxiliary boiler which draws high-pressure superheated steam from the vessel's propulsion system [1] to generate low pressure saturated steam. This secondary steam is then used to power auxiliary shipboard engines driving winches or pumps, or to meet any steam requirement that does not require superheating ...
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donkey boiler: A donkey boiler is used to supply non-essential steam to a ship for 'hotel' services such as heating or lighting when the main boilers are not in steam, for example, when in port. [3] Donkey boilers were also used by the last sailing ships for working winches and anchor capstans.
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