Three-drum boiler
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Three-drum boilers are a class of water-tube boiler used to generate steam, typically to power ships. They are compact and of high evaporative power, factors that encourage this use. Other boiler desi
Three-drum boiler, casing removed
A flat of three Yarrow boilers
A Yarrow boiler, with the casing removed
A Royal Navy sailor cleans the water tubes inside a ship's boiler with a ribbon brush, c. 1939–1945.
Yarrow boiler
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Yarrow boilers are an important class of high-pressure water-tube boilers. They were developed by Yarrow & Co., Shipbuilders and Engineers and were widely used on ships, particularly warships.
Three-drum boiler
…of higher pressures and compound engines in marine practice, Gresley was keen to experiment with this approach in a railway locomotive. As with the land-based boilers, Harold Yarrow was keen to expand the market for Yarrow's boiler. The boiler was not the usual Yarrow design. In operation, particularly its circulation…
Yarrow's U-tube circulation experiment
Cleaning a Yarrow boiler
End half-section of a boiler, showing the enclosing furnace and flue