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|length = |locoweight = |fueltype = Coal |fuelcap = |watercap = , later |boilerpressure = |firearea = |totalsurface = |cylindercount = Two, inside |cylindersize = |valvegear = Allan |tractiveeffort = |operator = |powerclass = LMS: 1P |numinclass = ''1 January 1923:'' 76 |nicknames = ''Jumbos'', '' large Jumbos'' |withdrawndate = 1905–1933 |disposition = One preserved, remainder scrapped }} The London and North Western Railway (LNWR) Improved Precedent class or Renewed Precedent class is a class of 2-4-0 steam locomotive originally designed for express passenger work. They later gained the nickname of ''Jumbos''. ==History== The locomotives were designed by F. W. Webb. A total of 158 were built in batches by Crewe Works 1887–1897 with two further additions in 1898 and 1901 respectively. They were officially "renewals" (i.e. replacements) of 96 Newton Class and 62 Precedent Class, so that, accountancy purposes, they could be charged against the Revenue account rather than the Capital account of a "new" locomotive. On renewal, they kept the numbers and names of their predecessors, and as a result the numbering system continued to be completely haphazard. In addition, the eight Precedent class locomotives that were not renewed, were rebuilt to the Improved specification, but they retained their original thick frames, whereas the renewed locomotives had frames. On 22 August 1895, 790 ''Hardwicke'' took 2 hours and 6 minutes for the from to , with an average speed of , setting up a new speed record during the Race to the North. Withdrawals started in December 1905. The London, Midland and Scottish Railway acquired 76 upon the grouping of 1923, and gave them the power classification 1P. The LMS assigned these the numbers 5004–79, in order of build date, though not all received them as withdrawals continued apace. By the end of 1933, only 5001 ''Snowdon'' survived and in April 1934 it was renumbered 25001 to clear the number 5001 for an LMS Stanier Class 5 4-6-0, but was withdrawn in October that year. 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「LNWR Improved Precedent Class」の詳細全文を読む スポンサード リンク
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