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LNWR Precursor class (Webb)
LNWR engine No. 680 'Giffard'
Type and origin Power type Steam Designer F. W. Webb Builder Crewe Works Serial number 1902–1821, 2229–2238, 2249–2258 Build date 1874–1879 Total produced 40
Specifications Configuration: ​  • Whyte 2-4-0  • UIC 1B n2 Gauge 4 ft 8+1⁄2 in (1,435 mm) Leading dia. 3 ft 6 in (1.067 m) Driver dia. 5 ft 6 in (1.676 m) Wheelbase 7 ft 5 in (2.261 m) + 8 ft 3 in (2.515 m) Loco weight 32 long tons (33 t) Boiler: ​  • Diameter 4 ft 2 in (1.27 m)  • Tube plates 9 ft 10 in (3.00 m) Boiler pressure 140 lbf/in (0.97 MPa) Heating surface 1,074.6 sq ft (99.83 m) Cylinder size 17 in × 24 in (432 mm × 610 mm) Valve gear Allan
Career Operators London and North Western Railway Scrapped 1892–1895 Disposition All scrapped

The London and North Western Railway (LNWR) Precursor class was a class of forty 2-4-0 steam locomotives designed by F. W. Webb and built at the railway's Crewe Works between 1874 and 1879.

History

The Precursor class was the first locomotive class to be designed wholly by F. W. Webb. He had previously ordered further examples of his predecessor's Samson and Newton classes.

The class featured enclosed wheel splashers and cabs from new, but no brakes were initially fitted; some received steam brakes and others vacuum brakes.

They were fitted with 1,500-imperial-gallon (6,800 L; 1,800 US gal) tenders.

Fleet list

References

1. Baxter 1979, pp. 185–186.

• 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. ISBN 0-903485-84-2.

v t e London and North Western Railway locomotives
John Ramsbottom (North Eastern Division 1846–1857)
Francis Trevithick (Northern Division 1846–1857)	SFB passenger 187 Velocipede 173 Cornwall 290 Rocket LFB passenger 7ft Single (Raven) 176 Courier SFB goods LFB goods SFB goods tank LFB goods tank
John Ramsbottom (Northern Division 1857–1862)	3020 Cornwall (renewed) 271 DX Problem / Lady of the Lake
Edward Bury (Southern Division 1846–1847)	Bury Bar Frame locomotive
James McConnell (Southern Division 1847–1862)	Bloomer McConnell Goods Wolverton Express Goods
John Ramsbottom (1862–1871)	4ft Shunter Samson Newton Special Tank
Francis William Webb (1871–1903)	Alfred the Great Chopper Tank Coal Engine Coal Tank Experiment Dreadnought Teutonic Greater Britain John Hick Dock Tank Precursor Precedent Improved Precedent Jubilee Waterloo 4ft 6in Tank 5ft 6in Tank 18in Goods (Cauliflower) 18in Tank A B 1400 Class
George Whale (1903–1909)	Experiment 19in Express Goods Precursor Precursor Tank Renown C D E F G
Charles John Bowen Cooke (1909–1920)	1185 Claughton George V Queen Mary Prince of Wales Prince of Wales Tank C1 G1 MM
H. P. M. Beames (1920–1921)	380 G2 G2A
George Hughes (1922–1923)	No new locomotive classes
Locomotives of the London and North Western Railway LMS locomotives British Railways steam locomotives

• London and North Western Railway locomotives
• 2-4-0 locomotives
• Railway locomotives introduced in 1874
• Scrapped locomotives
• Standard gauge steam locomotives of Great Britain