LNER Hush Hush: Gresley's Unique Failure.

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A short history of the LNER Hush Hush
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For a thorough technical dissertation on the operation of various valve-gears, visit you local library and get hold of a stack of "Model Engineer" magazines commencing with issue # 4718, Volume 230, 2nd June to 15th June. Author, Duncan Webster commences a multi-part series on a technically immersive description of just about every form and manner of steam-engine valve-gear known to man.

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