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London & North Western Railway Society
Glossary for the LNWR Society

Glossary Results for Word "Rocking Arms"

Rocking Arms or rocking levers, these are normally associated with four-cylinder engines where the motion from one set of valves is used to operate a second set by means of levers, rather than a complete additional set of valve gearExplain 'Valve Gear'. One example is the ‘Jubilee’ classExplain 'Jubilee 4-4-0 Locomotive Class' compounds where the inside valve gear was connected to valves for the outside cylinders via levers mounted ahead of the cylinders. In the ‘Claughton’ class locomotives the outside valve gear operated valves for the inside cylinders in a similar manner.