Applications
Joy valve-gear was used extensively on Lancashire and Yorkshire Railway and London and North Western Railway locomotives, and also on the Manning Wardle-built narrow gauge 2-6-2 locomotives of the Lynton and Barnstaple Railway. Joy gear was also used by John Fowler & Co. and several other steam traction engine manufacturers. The most numerous locomotive class using Joy valve gear was Russian O class, in Od and OD variants (over 4500 built) - a letter "d" / "D" in their designations stood for Joy (in Russian phonetically: Джой - Dzhoy).
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