LNWR Improved Precedent Class

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LNWR Improved Precedent Class
LNWR Jumbo class locomotive 790 Hardwicke (Howden, Boys' Book of Locomotives, 1907).jpg
LNWR No. 790 Hardwicke, circa 1907.
Type and origin
Power type Steam
Designer F. W. Webb
Builder Crewe Works
Build date 1887–1901
Total produced 158
Specifications
Configuration 2-4-0
UIC classification 1B n2
Gauge 4 ft 8 12 in (1,435 mm)
Leading wheel
diameter
3 ft 6 in (1,067 mm) + 3-inch (76 mm) tyres
Driver diameter 6 ft 9 in (2,057 mm)
Wheelbase
  • Coupled: 8 feet 3 inches (2.51 m)
  • Loco: 15 ft 8 in (4.78 m)
Locomotive weight 35.60 long tons (36.17 t)
Fuel type Coal
Water capacity 1,800 imp gal (8,200 l; 2,200 US gal), later 2,000 imp gal (9,100 l; 2,400 US gal)
Boiler pressure 150 lbf/in2 (1.03 MPa)
Heating surface:
– Total
1,063.7 sq ft (98.82 m2)
Cylinders Two, inside
Cylinder size 17 in × 24 in (432 mm × 610 mm)
Valve gear Allan
Performance figures
Tractive effort 10,918 lbf (48.6 kN)
Career
Operator(s)
Power class LMS: 1P
Number in class 1 January 1923: 76
Nicknames Jumbos, large Jumbos
Withdrawn 1905–1933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[edit]

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 78 inch (22 mm) thick frames, whereas the renewed locomotives had 1-inch (25 mm) frames.

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 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.

Accidents and incidents[edit]

  • On 15 August 1895, locomotive No. 275 Vulcan was one of two locomotives hauling an express passenger train that derailed at Preston, Lancashire due to excessive speed on a curve. One person was killed.[1]
Main article: Weedon rail crashes
  • On 14 August 1915, a locomotive hauling a passenger train suffered a mechanical defect which resulted in track being damaged at weedon, Northamptonshire. Locomotive No. 1189 Stewart was one of two hauling a mail train that was derailed on the damaged track. Ten people were killed and 21 were injured.

Preservation[edit]

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. In the same year it made a special run on the Settle - Carlisle railway, double heading with Midland compound 1000, to celebrate the line's centenary. During this period it was allocated T.O.P.S. number 98190.[2]

Hardwicke at the NRM

It is currently a static exhibit in the National Railway Museum in York.


Fleet list[edit]

† LMS number allocated, but never applied

References[edit]

  1. ^ Trevena, Arthur (1981). Trains in Trouble: Vol. 2. Redruth: Atlantic Books. p. 7. ISBN 0-906899-03-6. 
  2. ^ Harris, Roger (2004). The Allocation History of BR Diesels & Electrics (Part Four). Roger Harris, Bromsgrove, UK. 
  • Baxter, Bertram (1979). Baxter, David, ed. British Locomotive Catalogue 1825–1923, Volume 2B: London and North Western Railway and its constituent companies. Ashbourne, Derbyshire: Moorland Publishing Company. pp. 188–191. ISBN 0-903485-84-2. 
  • 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. 
  • Yeadon, W. B.. Yeadon's Register of LNWR Locomotives, Volume 1: Passenger Tender Engines. 

External links[edit]