LNWR Alfred the Great Class

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LNWR Alfred the Great Class
LNWR engine No.1942.jpg King Edward VII.jpg
Type and origin
Power type Steam
Designer F. W. Webb
Builder Crewe Works
Serial number 4125–4134, 4195–4204, 4285–4294, 4335–4344
Build date 1901–1903
Total produced 40
Specifications
Configuration:
 • Whyte 4-4-0
 • UIC 2′B n4v
Gauge 4 ft 8 12 in (1,435 mm)
Leading dia. 3 ft 9 in (1.143 m)
Driver dia. 7 ft 1 in (2.159 m)
Loco weight 57.60 long tons (58.52 t)
Boiler pressure 200 lbf/in2 (1.38 MPa)
Heating surface 1,579.5 sq ft (146.74 m2)
Cylinders Four: two HP (outside); two LP (inside)
High-pressure cylinder 16 in × 24 in (406 mm × 610 mm)
Low-pressure cylinder 20 12 in × 24 in (521 mm × 610 mm)
Valve gear Joy
Performance figures
Tractive effort 80%: 30,544 lbf (135.87 kN)
Career
Operators
Power class LMS: 2P
Number in class 1 January 1923: 15
Withdrawn 1923–1928
Disposition 33 rebuilt as 2-cylinder simple Renown-class locomotives (1913–1924); remainder (and all Renowns) scrapped.

The London and North Western Railway (LNWR) Alfred the Great class, after modification known as the Benbow Class was a class of 4-4-0 4-cylinder compound locomotives by F.W. Webb. A total of forty were built from 1901–1903. They were a development of the Jubilee Class, with a slightly larger boiler.

Unusually for the LNWR, the locomotives were assigned a number series, this being 1941–1980.

Compounds had proven unreliable, so starting in 1908 Whale started rebuilding the Jubilees into the 2 cylinder simple Renown Class. Bowen-Cooke started the same process with the Benbows in 1913, and these too were added to the Renown Class. Rebuilt engines retained their numbers. Benbow 1974 Howe was superheated in 1921; the only member of the class so treated.

Number 1976 Lady Godiva was withdrawn in December 1922 without rebuilding. By the grouping of 1 January 1923, when the LNWR passed into London, Midland and Scottish Railway (LMS) ownership, 25 had been rebuilt to Renowns, leaving fourteen Benbows. Of these, 1956 was withdrawn in early 1923, before it could be allocated an LMS number, but the remaining 13—1944/52–55/64/66/67/69/70/74/77/79 were allocated the LMS numbers 5118–5130, sequentially. The LMS continued conversions, rebuilding another eight—1952–54/64/67/69/70/74 in 1923/4. The remainder four Benbows 1944/55/66/79 were withdrawn between 1923–1927, the last being 1974 Howe in 1928 – none of these last five received their allocated LMS numbers. And thus the class was made extinct.

Stock list[edit]

References[edit]

  • 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. 199–201. 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. p. 61. ISBN 0-7110-0554-0. 
  • Yeadon, W. B. A Compendium of LNWR Locomotives 1912–1949, Volume 1. Nottingham: Challenger Publications. ISBN 978-1-901945-90-4.