Wikipedia

GWR 4500 Class

The Great Western Railway (GWR) 4500 Class or Small Prairie is a class of 2-6-2T steam locomotives.

GWR 4500 Class
4569 at Dawlish in 1954
Type and origin
Power typeSteam
DesignerGeorge Jackson Churchward
Builder
  • Wolverhampton Works (20)
  • Swindon Works (55)
Order number
  • Wolverhampton: Lot N3
  • Swindon: Lots 174, 191, 201, 226
Serial number
  • Wolverhampton 775–794
  • Swindon: 2310–2319, 2496–2505, 2597–2611
Build date1906–1924
Total produced75
Specifications
Configuration:
​
 • Whyte2-6-2T
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.4 ft 7+1⁄2 in (1.410 m)
Loco weight57 long tons (58 t; 64 short tons)
Fuel typeCoal
Fuel capacityOriginally: 3 long tons 0 cwt (6,700 lb or 3 t)
From 1924 onwards: 3 long tons 14 cwt (8,300 lb or 3.8 t)
Water cap.1,000 imp gal (4,500 L; 1,200 US gal)
Boiler:
​
 • TypeStandard 5[1]
Boiler pressure200 psi (1.4 MPa)
CylindersTwo, outside
Cylinder size17 in × 24 in (432 mm × 610 mm)
Performance figures
Tractive effort21,250 lbf (94.5 kN)
Career
Operators
Class4500
Power class
  • GWR: C
  • BR: 4MT
Axle load classGWR: Yellow
LocaleWestern Region
WithdrawnFebruary 1950 – September 1964
DispositionThree preserved, remainder scrapped

History

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They were designed as small mixed traffic locomotives, mainly used on branch lines. The design was based on the earlier 4400 Class, but with larger driving wheels and altered wheel spacing. This gave them extra speed — capable of 60 mph (97 km/h) in service.[2] A total of 75 were built; 55 were built in four batches between 1906 and 1915 and a fifth batch of 20 locos was built in 1924, during Collett's tenure at Swindon. The first two batches were originally numbered 2161–2190 but were renumbered 4500–4529 during 1912. The first batch (2161–2180) is significant in that it was the last batch of locos built at Stafford Road Works, Wolverhampton.[3] Of this batch 2168 (as 4507) was the last Wolverhampton-built loco to remain in service with BR, not being withdrawn until 1963. The final two batches built were nos. 4530–4554 in 1913-15 and nos. 4555–4574 in 1924.

Table of orders and numbers[4]
Year Quantity Lot No. Works Nos. Locomotive numbers Notes
1906–08 20 Wolverhampton N3 Wolverhampton 775–794 2161–2180 renumbered 4500–4519 in 1912
1909–10 10 Swindon 174 Swindon 2310–2319 2181–2190 renumbered 4520–4529 in 1912
1913 10 Swindon 193 Swindon 2516–2525 4530–4539
1914–15 15 Swindon 201 Swindon 2597–2611 4540–4554
1924 20 Swindon 226 — 4555–4574

The 4575 Class was a later development with larger side tanks.

Rhondda and Swansea Bay Railway and Port Talbot Railway

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The Rhondda and Swansea Bay Railway (R&SBR) had been worked by the GWR since 1 July 1906, although it was not absorbed until 1 January 1922.[5][6][7] In April 1907, the GWR sent three new locomotives of the first batch, nos. 2165–7, to the R&SBR; these were given R&SBR numbers 31–33.[8] The Port Talbot Railway (PTR) was absorbed by the GWR on 1 January 1908, but its locomotive fleet remained separate until 1 January 1922.[9][6][10] In March 1909, R&SBR nos. 31 and 32 were transferred to the PTR, regaining their GWR numbers 2165 and 2166. These two were returned to the GWR in 1912, being renumbered 4504 and 4505 in December that year. No. 33 was not returned until January 1914, when it was renumbered 4506.[8][11]

Preservation

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Three of the class still exist, two of them survivors from Woodham Brothers scrapyard in Barry, Vale of Glamorgan, South Wales. All of them have run in preservation.

4555: Warrior

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4555 was bought in working order from British Railways by Patrick Whitehouse and fellow Talyllyn Railway member Pat Garland, so has never had to be restored. Originally working on the Dart Valley Railway, she later moved to the Dartmouth Steam Railway. She returned to steam in 2020 after having been under a major overhaul since 2014.[12] Currently on a 3-year loan to the East Somerset Railway from March 2020. Went on loan to the Chinnor & Princes Risborough Railway for the 2024 season. She currently carries the name: Warrior.

4561

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This locomotive left Woodham Brothers in September 1975. It is currently undergoing an extensive overhaul on the West Somerset Railway, having been out of service since 1998.[13]

4566

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4566 waiting at Kidderminster

Currently stored out of service on the Severn Valley Railway awaiting an overhaul, this locomotive left Woodham Brothers in August 1970. It returned to service in late 2006 following an overhaul and after several years painted in Great Western green, was repainted into BR unlined black with the early crest for the first time in preservation. It was withdrawn from service in January 2017 following the expiry of her boiler certificate.[14] It is on display inside the Engine House at Highley until its turn to overhaul comes again.

Model railways

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In 2004, Bachmann introduced six model versions of the locomotive in OO gauge: These were locomotives 4569 in BR lined green; 4550, 5531 and 5555 in GWR green; and 4573 and 5500 in BR black.[15]

See also

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References

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  1. ^ Champ, Jim (2018). An Introduction to Great Western Locomotive Development. Barnsley: Pen & Sword Transport. p. 319. ISBN 978-1-4738-7784-9. OCLC 1029234106. OL 26953051M.
  2. ^ le Fleming (1962), pp. J46–J50.
  3. ^ Holcroft (1957), p. 44.
  4. ^ Allcock et al. (1968), pp. 23, 31–32, 34.
  5. ^ MacDermot (1931), p. 436.
  6. ^ a b Allcock et al. (1951), p. 13.
  7. ^ Davies et al. (1966), p. K248.
  8. ^ a b le Fleming (1962), p. J48.
  9. ^ MacDermot (1931), p. 443.
  10. ^ Davies et al. (1966), p. K242.
  11. ^ Davies et al. (1966), pp. K247, K252.
  12. ^ "South Devon Railway | Locomotives | Gone but not forgotten | GWR 2-6-2T No 4555". 10 March 2020.
  13. ^ "The Locomotives - WSRA". Archived from the original on 14 October 2013.
  14. ^ "SVR - Meet the Loco". Archived from the original on 6 January 2014.
  15. ^ "More new releases from Bachmann". British Railway Modelling. Vol. 12, no. 8. Bourne: Warners Group Publications. November 2004. p. 39. ISSN 0968-0764. OCLC 1135061879.
  • Allcock, N.J.; Davies, F.K.; le Fleming, H.M.; Maskelyne, J.N.; Reed, P.J.T.; Tabor, F.J. (June 1951). White, D.E. (ed.). The Locomotives of the Great Western Railway, part one: Preliminary Survey. Kenilworth: RCTS. ISBN 0-901115-17-7. OCLC 650412984.
  • Allcock, N. J.; Davies, F. K.; le Fleming, H. M.; Maskelyne, J. N.; Reed, P. J. T.; Tabor, F. J. (1968) [1951]. White, D. E. (ed.). The Locomotives of the Great Western Railway, part one: Preliminary Survey. Kenilworth: RCTS.
  • Davies, F.K.; Firth, J.M.; Lucking, J.H.; Thomas, R.E.; Allcock, N.J.; Sterndale, A.C.; Barrie, D.S.M.; Reed, P.J.T.; Mountford, E.R. (April 1966). White, D.E. (ed.). The Locomotives of the Great Western Railway, part ten: Absorbed Engines, 1922-1947. RCTS. ISBN 0-901115-20-7.
  • le Fleming, H.M. (February 1962). White, D.E. (ed.). The Locomotives of the Great Western Railway, part nine: Standard Two-Cylinder Classes. RCTS.
  • Holcroft, H. (1957). Great Western Locomotive Practice 1837–1947. London: Locomotive Publishing Company.
  • MacDermot, E.T. (1931). History of the Great Western Railway, vol. II: 1863-1921. Paddington: Great Western Railway. OCLC 55853736.
  • Whitehurst, Brian (1973). Great Western Engines, Names, Numbers, Types and Classes (1940 to Preservation). Oxford, UK: Oxford Publishing Company. ISBN 978-0-9028-8821-0. OCLC 815661.

Further reading

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  • Green-Hughes, Evan (March 2008). "Small is beautiful". Hornby Magazine. No. 9. Hersham: Ian Allan Publishing. pp. 68–71. ISSN 1753-2469. OCLC 226087101.
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