LSWR S15 class

Last updated

LSWR/SR S15 class [1]
SR express freight 4-6-0, 833 (CJ Allen, Steel Highway, 1928).jpg
S15 No. 833
Type and origin
Power typeSteam
Designer Robert Urie, modified by Richard Maunsell
BuilderLSWR/SR Eastleigh Works
Build date19201936
Total produced45
Specifications
Configuration:
   Whyte 4-6-0
   UIC 2′C h2
Gauge 4 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 type Coal
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)
Cylinders Two, outside
Cylinder size Urie: 21 in × 28 in (533 mm × 711 mm);
Maunsell: 20+12 in × 28 in (521 mm × 711 mm)
Valve gear Walschaerts
Performance figures
Tractive effort Urie: 28,200  lbf (125.4  kN);
Maunsell: 29,860 lbf (132.8 kN)
Career
Operators
Class S15
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"
Locale Southern 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]

Contents

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]

Background

During the First World War, the LSWR management wished to address the requirement for a modern, standard heavy freight locomotive to work from London's freight yards to the southwest of England. [1] As the LSWR lacked existing freight designs capable of undertaking this task, a new design was needed to serve the south coast ports of Portsmouth, Weymouth and Southampton. The design was also to power traffic including milk trains, which required fast transit to the dairies in London. [5] Robert Urie used this opportunity to develop his recent H15 class design further, applying the 4-6-0 locomotive concept to a purpose-built freight design built to order number S15. It was this order number that gave the class the name "S15". [6]

Construction history

The S15 class were all built by Eastleigh Works in three discrete batches between February 1920 and December 1936.

First batch – Urie 1920–21

This was the third design by Robert Urie for the LSWR. The outline was made during the First World War, and incorporated lessons learned from the operation of his H15 class, a design that was to provide the basis for future standardisation on the LSWR. [7] To economise on maintenance, the S15 class had interchangeable components that could be used on a similar design, the N15 class passenger locomotive, which had the same overall appearance. [1] Details such as the boiler, the two-cylinders and valve gear were standardised between the classes, although a taper boiler was used on the S15 and N15 classes, as opposed to the parallel boiler of the H15 class. [8] The only other major difference was the smaller diameter of the driving wheels. [9] Smaller diameter wheels gave better traction, essential for a fast freight locomotive. [1]

By May 1921, sixteen were in service, and were mostly allocated to the London area, including the new marshalling yard at Feltham. [7] Despite being mechanically sound, changes were made to Urie's original design after the Grouping of railway companies in 1923. [1]

Urie retired as Locomotive Superintendent when the LSWR was amalgamated into the Southern Railway in 1923. Richard Maunsell was given the newly created post of CME to the Southern Railway, and decided to revise the cylinder arrangement of the locomotive. In doing so, he delayed the construction of further locomotives until the modifications had been made. [10] When the modifications were trialled in service, it became evident amongst locomotive crews that Maunsell had taken a sound design and made it better, achieving a consistent locomotive capable of undertaking all the tasks for which it was intended. [8] With the successful implementation of the modifications, permission was given by the management of the Southern Railway for a second batch of locomotives to be constructed. [10]

In November 1941 during World War II, Nos. 496-499 were loaned to the Great Western Railway to assist with increased freight traffic on that railway. They were returned to the SR between March and July 1943. [11]

Second batch – Maunsell 1927–28

Maunsell's modifications included increasing the boiler pressure from 180 psi (1.24 MPa) to 200 psi (1.38 MPa), and the reduction of the cylinder bore by half an inch. [12] The footplate was also modified for operation on the Southern's new composite loading gauge, and differed from previous batches in having the Ashford-style cab, which was usually fitted to LBSCR locomotives. [1] Unlike the original Drummond cab that was also favoured by Urie, the Ashford-style cab was of an all-steel construction and had a roof that was flush with the cab sides. It was inspired by the standard cab developed in 1904 by R. M. Deeley for the Midland Railway, and was one of a number of Midland features introduced by Maunsell's chief draughtsman James Clayton, who transferred to Ashford Works in 1914 from the Midland Railway. [8] Variants of this cab became standard for all new Southern Railway locomotives and converted tank engines.

Other modifications included the lengthening of valve travel, and fitting larger outside steam pipes to streamline the flow of steam into the cylinders. [13] Fifteen locomotives of this revised design were built in 1927, and some were given 4,000-imperial-gallon (18,000 L; 4,800 US gal) six-wheeled tenders for use on the Southern Railway's Central section. [12] This allowed the locomotive to be turned on the shorter turntables found on this part of the network. [12] From new, the rest of the class was equipped with the Urie 5,000-imperial-gallon (23,000 L; 6,000 US gal) eight-wheel bogie tender, which allowed the class to operate on the extended freight routes of the Southern Railway's Western section. [14] The standardisation measures undertaken by both Urie and Maunsell were soon vindicated by the fact that tenders and other parts were swapped with those of other classes on the Southern Railway when locomotives were under overhaul. [1]

Third batch – Maunsell 1936

The benefits gained by Maunsell's modifications showed in the improved performance of the first batch of Maunsell S15s over their Urie-built predecessors. [1] A third batch was ordered in 1931, coinciding with a downturn in the volume of freight due to the Great Depression. This meant that the last of the S15 class was not completed until 1936, although weight-saving modifications were undertaken to this batch. [1] A final modification was also applied to the class at this time, when all locomotives were equipped with smoke deflectors to improve visibility from the footplate when travelling at speed. [15] This modification was a feature that became common to most Maunsell-influenced designs.

Operational details

After modification by Maunsell, the S15 class was regarded by locomotive crews as an excellent goods engine best known for working heavy night express goods trains between Exeter, Southampton and Nine Elms. The S15s were also very capable passenger engines, being able to deputise in situations where there was a shortage of passenger locomotives during peak holiday periods. [1] Both Urie and Maunsell S15s spent most of their working lives on the Southern Railway's Western section, although they were sometimes used on inter-regional freights. [16] In order to increase maintenance efficiency, all Urie S15 locomotives (which had the lower boiler pressure) were concentrated at the Southern Railway's London freight depot at Feltham. [17] This yard also featured the Maunsell S15s, which were allocated to Exmouth Junction, Hither Green and Salisbury, demonstrating the "go anywhere" nature of the class. [1] Despite the design being only a year newer, the S15s outlasted their N15 King Arthur class counterparts because of their dual freight/passenger abilities, though they were retired between 1962 and 1966 as part of the British Railways Modernisation Plan. [15] Maunsell S15 number 30837 became the final member of the class in operation, returning to Feltham in January 1966 to work a farewell rail tour. [1]

Table of withdrawals
YearQuantity in
service at
start of year
Quantity
withdrawn
Locomotive numbersNotes
196245430502/04–05, 30826
1963411830496–98, 30500–01/03/07–11/13–15, 30829/31/45–46
1964231730499, 30506/12, 30823/25/27–28/30/32/34–36/40–41/43–44/4730512 was the last ex-LSWR loco withdrawn
19656630824/33/37–39/42

Accidents and incidents

Preservation

Seven S15s have been preserved, two Urie examples and five by Maunsell, which can be seen at several heritage railways around the country. All the surviving members of the class were purchased from Woodham Brothers scrapyard in Barry, Vale of Glamorgan, South Wales. Currently only 499 and 830 have yet to steam in preservation. Of the five others that have run in preservation 825, 828 and 841 have all operated on the main line at certain points, though 825 has only run between Grosmont & Whitby. [19]

Details of preserved engines
NumberImageBuiltWithdrawnService LifeHome LineOwnerStatusNotes
SRBR
49930499 LSWR Urie 499 Frames.jpg May 1920Jan 196443 Years, 8 months Mid-Hants Railway Urie Locomotive Society. [20] Undergoing restoration.Being restored to original LSWR (London & South Western Railway) design.
50630506 LSWR S15 No. 506 at Ropley.jpg Oct 1920Jan 196443 Years, 3 months Mid-Hants Railway Urie Locomotive Society [20] Operational, boiler ticket expires: 2029Returned to service 2 June 2019 after an 18-year overhaul including front frame replacement.
82530825 A long way from home - geograph.org.uk - 761062.jpg Jun 1927Jan 196436 Years, 9 months North Yorkshire Moors Railway Essex Locomotive SocietyOperational, boiler ticket expires: 2029Returned to service September 2019. Main line certified (Whitby to Grosmont and Battersby only). Running with the boiler and tender from 30841. [21]
82830828 SR 828.jpg Jul 1927Jan 196436 Years, 6 monthsWatercress LineEastleigh Railway Preservation Society [22] Undergoing overhaul.Named Harry A Frith during its preservation career. [23]
83030830 SR Maunsell Class S15 30830 (8430059925).jpg Aug 1927Jul 196436 Years, 11 monthsNorth Yorkshire Moors RailwayEssex Locomotive SocietyStored awaiting restorationUsed to be based at the Bluebell Railway. [24]
84130841 Southern 841 - geograph.org.uk - 1522860.jpg Jul 1936Jan 196427 Years, 6 monthsNorth Yorkshire Moors RailwayEssex Locomotive SocietyCannibalised, Frames StoredThe locomotive's boiler and tender are currently in use on 825. Frames are stored in a field near Grosmont headshunt. Carried the name Greene King during its preservation career. [25]
84730847 S15 847 running round at Sheffield Park.jpg Dec 1936Jan 196427 Years, 1 month Bluebell Railway Maunsell Locomotive SocietyOut of serviceThe locomotive appeared in the 2017 film Goodbye Christopher Robin and in the 2018 film Christopher Robin . [26]

Livery and numbering

LSWR and Southern Railway

Under LSWR ownership the S15s were painted in the late LSWR dark Holly Green livery, with the same black and light green lining applied to most of the LSWR's freight designs. Gilt lettering and numbering was located on the tender and cabside respectively. [27] The initials "LSWR" were located on the tender.

825 approaching Levisham Station on the North Yorkshire Moors railway Southern 825 approaching Levisham Station.jpg
825 approaching Levisham Station on the North Yorkshire Moors railway

The first Southern Railway livery continued that of the LSWR, but with the number displayed on the tender. However from 1925, a darker Olive-type green was substituted, and the entire class was so painted. [27] Wheels were green with black tyres, and the cabside numbers were replaced by a cast oval plate with "Southern Railway" around the edge and the number in the centre. [12] Primrose Yellow "Southern" and locomotive number transfers were placed on the tender tank. From 1927, the Maunsell locomotives were given black livery with green lining, and remained in that guise with little modification until nationalisation. [27]

The only slight livery modification occurred before the Second World War, when Oliver Bulleid introduced the "Sunshine Yellow" lettering and numbering. [27] A further modification was the application of a green shaded "Sunshine" lettering during the war. This was finally reverted to "Sunshine Yellow" lettering and numbering after the war. [28] Nos. 496515 were built between 1919 and 1921, and Nos. 823837 were delivered from Eastleigh during 1927 and 1928 and a further ten, No.838847, were authorised in 1931.

British Railways

After a period in British Railways transitional livery the entire class was painted in British Railways Goods Black livery with no lining, the numbering located on the cabsides and the British Railways crest on the tender sides. [29] Numbering was initially as per Southern Railway with an "s" prefix, but the locomotives were eventually re-numbered under the British Railways standard numbering system according to batch. They were numbered in the series of 3049630515 for the Urie batch, 3082330837 for the second batch, and 3083830847 for the third. [30]

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References

Notes

  1. 1 2 3 4 5 6 7 8 9 10 11 12 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. 1 2 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.
  5. Russell (1991). p. 257.
  6. Clarke (April 2008). p. 48.
  7. 1 2 Bradley (1987). Section "S15 class".
  8. 1 2 3 Clarke (April 2008). p. 49.
  9. Russell (1991). pp. 257–260.
  10. 1 2 Russell (1991). p. 293.
  11. Sterndale et al. 1974 , pp. M41–M42
  12. 1 2 3 4 Haresnape (1977). Section "S15 class".
  13. Russell (1991). p. 294.
  14. Russell (1991). p. 296.
  15. 1 2 Russell (1991). p. 383.
  16. Russell (1991). p. 382.
  17. Russell (1991). p. 295.
  18. Bishop, Bill (1984). Off the Rails. Southampton: Kingfisher. p. 25. ISBN   0-946184-06-2.
  19. "Archived copy". Archived from the original on 7 May 2018. Retrieved 7 May 2018.{{cite web}}: CS1 maint: archived copy as title (link)
  20. 1 2 Langston (2008). pp. 104–105.
  21. "30825 (SR 825 & BR 30825)". Preserved British Steam Locomotives. 21 June 2017. Retrieved 20 September 2022.
  22. "Home | Eastleigh Railway Preservation Society". Archived from the original on 8 May 2018. Retrieved 7 May 2018.
  23. "30828 (SR 828 & BR 30828)". Preserved British Steam Locomotives. 21 June 2017. Archived from the original on 28 September 2020. Retrieved 8 May 2020.
  24. "Profile of S15 Class No.830". Maunsell Society. Archived from the original on 5 March 2016.
  25. "30841 (SR 841 & BR 30841)". Preserved British Steam Locomotives. 21 June 2017. Archived from the original on 30 September 2020. Retrieved 8 May 2020.
  26. "Goodbye Christopher Robin". HD\HQMOVIE SCREENCAPS GALLERY. Archived from the original on 7 November 2021. Retrieved 5 April 2021.
  27. 1 2 3 4 Swift (2006). p. 50.
  28. Swift (2006). p. 56.
  29. Longworth (2005). Section "Southern Locomotives".
  30. Ian Allan ABC (1958–59). "S15".

Bibliography

  • Bradley, D.L. (1987). LSWR Locomotives: The Urie classes. Didcot, Oxon: Wild Swan Publications. ISBN   0-906867-55-X.
  • Clarke, Jeremy (April 2008). "The Locomotives of R. E. L. Maunsell". Steam World (250).
  • Haresnape, Brian (1977). Maunsell Locomotives: A Pictorial History. Shepperton, Surrey: Ian Allan Limited. ISBN   0-7110-0743-8.
  • Herring, Peter (2000). Classic British Steam Locomotives. Section "S15 Class". London: Abbeydale Press. ISBN   1-86147-057-6.
  • Ian Allan ABC of British Railways Locomotives (Winter 1958–59 ed.). Shepperton, Surrey: Ian Allan Limited.
  • Langston, Keith (2008). British Steam Preserved: Illustrated Comprehensive Listing of Ex-British Railways Steam Locomotives. Horncastle: Morton's Media Group Limited.
  • Longworth, Hugh (2005). British Railway Steam Locomotives: 1948–1968. Hinckley: Oxford Publishing Company. ISBN   0-86093-593-0.
  • Russell, J. H. (1991). A Pictorial Record of Southern Locomotives. Hinckley: Oxford Publishing Company.
  • Sterndale, A.C.; Parker, L.T.; Smith, C.; Reed, P.J.T.; Tabor, F.J.; Davies, F.K.; Allcock, N.J.; Lucking, J.H. (May 1974). White, D.E. (ed.). The Locomotives of the Great Western Railway, part twelve: A Chronological and Statistical Survey. Kenilworth: RCTS. ISBN   0-901115-28-2. OCLC   499807460.
  • Swift, Peter (2006). Maunsell 4-6-0 King Arthur Class. Locomotives in Detail, volume 4. Hinckley: Ian Allan Publishing. ISBN   0-7110-3086-3.

Further reading