LNWR Webb Precursor Class

LNWR Precursor class (Webb)
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/in2 (0.97 MPa)
Heating surface 1,074.6 sq ft (99.83 m2)
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 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.
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