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Gnr class j23

The meaning of «gnr class j23»

The Great Northern Railway Class J23 was a class of 0-6-0T steam locomotive. They had long side tanks that came to the front of the smokebox, which sloped forwards to improve visibility and had a recess cut in to aid maintenance. Forty were built by the Great Northern Railway (GNR) between 1913 and 1922, with a further 62 being added by the London and North Eastern Railway (LNER) between 1924 and 1939. They were given the nickname "Submarines" due to their long tanks.[1]

For shunting and local goods work, the Great Northern Railway (GNR) had traditionally used saddle-tank engines of the 0-6-0 wheel arrangement; the last of these, of GNR Class J13, having been built in 1909 to the designs of H.A. Ivatt, the GNR Locomotive Superintendent.[2][3]

Nigel Gresley succeeded Ivatt in 1911,[4] and soon identified a need for engines to work the short-haul coal traffic in the West Riding of Yorkshire; the nature of which required that the locomotives also be suitable for shunting. He designed a new class of 0-6-0T engine, using side tanks instead of saddle tanks.[5] Gresley had recently begun the rebuilding of the GNR Class L1 0-8-2T locomotives with larger boilers, 4 feet 8 inches (1.42 m) in diameter,[6] which left a number of 4-foot-2-inch (1.27 m) diameter boilers spare. Thirty of these were used in the construction of the new goods tank engines between 1913 and 1919;[5] when ten more were built in 1922, these again used secondhand boilers, but 4 feet 5 inches (1.35 m) in diameter.[7] On the GNR, both varieties were classified J23, but the LNER divided them into J51 with smaller boilers, and J50 with larger boilers.[5] The LNER continued the construction of Class J50, building a further 62 up to 1939,[8] only the first ten of which were given secondhand boilers.[9] Class J51 were rebuilt to class J50 between 1929 and 1935.[5]

Each of the two main classes exhibited variations: locomotive brakes could be operated by vacuum or steam pressure; the driving position could be on the right- or the left-hand side of the cab; and there were three sizes of coal bunker. These variations were recognised by class subdivisions:[8]

All were built at Doncaster, except the last fourteen which were built at Gorton.[10] Further orders were placed in 1939 and 1941 totalling 25 more locomotives, but these were cancelled in 1942 after a number of components had been manufactured.[11] Withdrawals began in 1958 with the arrival of diesel shunters and ended in 1963 for the normal stock. 7 of them survived as departmental stock until 1965. The class became extinct in September 1965 when Departmental No. 14 (ex-68961) was withdrawn and scrapped. None of them survived into preservation.[12]

On the GNR, the numbers were 157–164, 166–176, 178, 211–230; these were increased by 3000 by the LNER.[13] The first ten engines built by the LNER were numbered 3231–40, following on from the GNR engines;[14] but those built from 1926 were given scattered numbers between 583 and 636, between 1037 and 1086, and 2789–94.[15]

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