conjugated valve gear

conjugated valve gear

The system for operating the valves of a third cylinder by means of levers driven by the motion of the valve gear of the other two cylinders. Its most famous version in the UK was that used by H. N. Gresley on his 3-cylinder locomotives for the Great Northern and LNE Railways from 1922 and adopted by some other railways world wide. Although it reduced the number of moving parts, its most serious disadvantage was the whip effect produced by the levers which caused excessive wear.

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