The Bulleid chain-driven valve gear is a type of steam locomotive valve gear designed by Oliver Bulleid during the Second World War for use on his Pacific (4-6-2) designs. It was peculiar to the Southern Railway in Britain, and borrowed from motor-vehicle practice in an attempt to create a compact and efficient design with a minimum of service requirements.
Read more about Bulleid Chain-driven Valve Gear: Design Principles, Problems
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“But Lord, remember me and mine
Wi’ mercies temporal and divine!
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Excelled by nane!
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—Robert Burns (1759–1796)