GCR Class 9P
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GCR Class 9P was a design of four-cylinder steam locomotive of the 4-6-0 wheel arrangement built for hauling express passenger trains on the Great Central Railway in England. A total of six were built
GCR Class 9P No. 1165 Valour
Caprotti valve gear
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The Caprotti valve gear is a type of steam engine valve gear invented in the early 1920s by Italian architect and engineer Arturo Caprotti. It uses camshafts and poppet valves rather than the piston v
GCR Class 9P
…instead of operating these by Lentz valve gear, as he had done with some of his other poppet valve fitments (such as Class B12), Gresley chose to use Caprotti valve gear. This was driven from the driving axle by a longitudinal shaft along the centre of the locomotive to a transverse shaft above the cylinders. No. 6168…
Duke of Gloucester
Caprotti valve gear on BR no. 73129