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LSWR S15 class information


LSWR/SR S15 class[1]
S15 No. 833
Type and origin
Power typeSteam
DesignerRobert Urie, modified by Richard Maunsell
BuilderLSWR/SR Eastleigh Works
Build date1920–1936
Total produced45
Specifications
Configuration:
 • Whyte4-6-0
 • UIC2′C h2
Gauge4 ft 8+12 in (1,435 mm) standard gauge
Leading dia.3 ft 7 in (1.092 m)
Driver dia.5 ft 7 in (1.702 m)
Length65 ft 6+34 in (19.98 m)
Total weight
  • Urie: 136 long tons 1 cwt (138.2 t; 152.4 short tons)
  • Maunsell: 135 long tons 13 cwt (137.8 t; 151.9 short tons)
Fuel typeCoal
Fuel capacity5 long tons (5 t; 6 short tons)
Water cap.5,000 imp gal (23,000 L; 6,000 US gal)
Boiler pressureUrie locomotives: 180 lbf/in2 (1.24 MPa); Saturated Boiler: 175 lbf/in2 (1.21 MPa); Maunsell locomotives: 200 lbf/in2 (1.38 MPa)
CylindersTwo, outside
Cylinder sizeUrie: 21 in × 28 in (533 mm × 711 mm);
Maunsell: 20+12 in × 28 in (521 mm × 711 mm)
Valve gearWalschaerts
Performance figures
Tractive effortUrie: 28,200 lbf (125.4 kN);
Maunsell: 29,860 lbf (132.8 kN)
Career
Operators
  • London and South Western Railway
  • → Southern Railway
  • → British Railways
ClassS15
Power class
  • LSWR / SR: A
  • BR : 6F
Numbers
  • LSWR: 496–515
  • SR: E496–E515, E823–E847 → 496–515, 823–847
  • BR: 30496–30515, 30823-30837 30838–30847
Nicknames"Goods Arthurs"
LocaleSouthern Region
Withdrawn1962–1966
Disposition6 preserved or extant, 1 cannibalised, remainder scrapped

The LSWR S15 class is a British 2-cylinder 4-6-0 freight steam locomotive designed by Robert W. Urie, based on his H15 class and N15 class locomotives. The class had a complex build history, spanning several years of construction from 1920 to 1936. The first examples were constructed for the London and South Western Railway (LSWR), where they hauled freight trains to the south coast ports and further west to Exeter, as well as occasional passenger work in conjunction with their larger-wheeled N15 class counterparts.[2][3]

Following the Grouping of railway companies in 1923, the LSWR became part of the Southern Railway, and the Chief Mechanical Engineer (CME) of the newly formed company, Richard Maunsell, increased the S15 class strength to 45 locomotives. Maunsell incorporated several improvements, notably to the steam circuit and the locomotive's loading gauge, allowing it to operate on routes with height and width restrictions.[3]

The new locomotives were built in three batches at Eastleigh, and were in service with the Southern Railway for 14 years. The locomotives continued in operation with the Southern Region of British Railways until 1966. Seven examples have been preserved for use on heritage railways, and are currently in varying states of repair. These locomotives were given the nickname "Goods Arthurs" due to their similar appearance to the N15 Class locomotives.[4]

  1. ^ Herring (2000). pp. 100–101.
  2. ^ Duggan, Jamie (9 December 2018). "LSWR/SR S15 Class steam locomotives - Class Information". RailAdvent. Retrieved 12 September 2022.
  3. ^ a b Maidment, David (2020). Urie & Maunsell 2-Cylinder 4-6-0s. Pen & Sword Transport. ISBN 978-1-4738-5253-2. OCLC 1033440846.
  4. ^ Harbridge, Len (21 October 2016). "Goods Arthur". Unseen Steam. Archived from the original on 20 August 2018. Retrieved 20 August 2018.

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