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GCR Class 9P : ウィキペディア英語版 | GCR Class 9P
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: one in 1917, and five in 1920. They were sometimes known as the ''Lord Faringdon'' class, from the name of the first one built. ==History== John G. Robinson served as Chief Mechanical Engineer of the Great Central Railway (GCR) from 1900 to 1922. Towards the end of his period of office, he introduced two classes of 4-6-0 locomotive with four cylinders and large-diameter boilers. They differed primarily in the diameter of their driving wheels: the first design, Class 9P (LNER Class B3 from September 1923), had diameter wheels, for express passenger service; and the second, Class 9Q (LNER Class B7), had wheels, for mixed-traffic work. The first locomotive of Class 9P to be built was costed at £5,871. The four cylinders had a bore of and a stroke of . They were set in line (like the LNWR Claughton Class), with the inside cylinders driving the front coupled axle, and the outside cylinders driving the middle coupled axle (like the GWR Star Class). The piston valves were actuated by two sets of Stephenson valve gear, mounted inside the frames and operating the valves of the outside cylinders through rocking shafts placed behind the cylinders. These rocking shafts caused the two valves on each side to move forwards and backwards together, and since the inside and outside cylinders on each side were out of phase by 180°, the valves of the outside cylinders were arranged for outside admission, instead of the normal inside admission layout. The boiler was the Gorton "No. 7 Standard", which was already used on two other GCR 4-6-0 classes: Class 1 (LNER Class B2) and Class 1A (LNER Class B8); it would later be used on Class 9Q as well. In July 1928, this boiler was assigned to LNER Diagram 13.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「GCR Class 9P」の詳細全文を読む
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