LNWR Improved Precedent Class

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LNWR Improved Precedent Class
LNWR No. 790 "Hardwicke" photographed in 1907.
Power type Steam
Designer F.W. Webb
Builder Crewe Works
Build date 1887–1901
Total produced 166
Configuration 2-4-0
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Driver diameter 6 ft 9 in (2,057 mm)
Locomotive weight 35.60 long tons (36.17 t)
Fuel type Coal
Boiler pressure 150 psi (1.03 MPa)
Cylinders Two, inside
Cylinder size 17 × 24 in (432 × 610 mm)
Valve gear Allan
Tractive effort 10,918 lbf (48.6 kN)
Career LNWR · LMS
Power class 1P
Number in class 1 January 1923: 80
Withdrawn 1908–1934
Disposition One preserved, remainder scrapped

The London and North Western Railway (LNWR) Improved Precedent Class or "Jumbo" Class is a class of 2-4-0 steam locomotive originally designed for express passenger work.

They were designed by F.W. Webb. 166 were built in batches Crewe Works 1887-1897 with two further additions in 1898 and 1901 respectively. They were officially rebuilds of 96 Newton Class and 80 Precedent Class, though in reality they were "paper" rebuilds – that is, they were recorded in the asset register as rebuilds for accountancy purposes, even though they were entirely new. On "rebuilding" (or renewal), they kept the numbers and names of their predecessors, and as a result the numbering system continued to be completely haphazard.

On 22 August 1895, 790 Hardwicke took 2 hours and 6 minutes for the 141 miles (227 km) from Crewe to Carlisle, with an average speed of 67.1 mph (108.0 km/h), setting up a new speed record during the Race to the North.

Withdrawals started in December 1905.

The LMS acquired 80 upon the grouping of 1923, and gave them the power classification 1P. The LMS assigned these the numbers 5000–79, 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survived and in April 1934 it was renumbered 25001 to clear the number 5001 for an LMS Stanier Class 5 4-6-0, but was withdrawn in October that year.

One, 790 Hardwicke (built 1892, LMS No. 5031, withdrawn 1932) has been preserved as part of the National Railway Collection. It was overhauled in 1976 and hauled some excursion trains on the main line, on one of which it double-headed with Flying Scotsman. During this period it was allocated T.O.P.S. number 98190.[1] It is currently a static exhibit in the National Railway Museum in York.

[edit] Stock list

[edit] References

  1. ^ Harris, Roger (2004). The Allocation History of BR Diesels & Electrics (Part Four). Roger Harris, Bromsgrove, UK. 
  • Casserley, H.C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. pp. 58–59. ISBN 0-7110-0554-0. 
  • Willie Yeadon Yeadon's Register of LNER Locomotives Vol 1 Passenger Tender Engines

[edit] External links

Wikimedia Commons has media related to: LNWR Jumbo class
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