GWR_4500_Class Knowpia

Specifications
Specifications
Configuration:;
• Whyte	2-6-2T
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.	4 ft 7+1⁄2 in (1.410 m)
Loco weight	57 long tons (58 t; 64 short tons)
Fuel type	Coal
Fuel capacity	Originally: 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:;
• Type	Standard 5
Boiler pressure	200 psi (1.4 MPa)
Cylinders	Two, outside
Cylinder size	17 in × 24 in (432 mm × 610 mm)

Type and origin
Type and origin
Power type	Steam
Designer	George 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 date	1906–1924
Total produced	75

GWR 4500 Class
GWR 4500 Class
	4569 at Dawlish
Power type
Type and origin
Power type	Steam
Designer	George 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 date	1906–1924
Total produced	75
Configuration:;
Specifications
Configuration:;
• Whyte	2-6-2T
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.	4 ft 7+1⁄2 in (1.410 m)
Loco weight	57 long tons (58 t; 64 short tons)
Fuel type	Coal
Fuel capacity	Originally: 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:;
• Type	Standard 5
Boiler pressure	200 psi (1.4 MPa)
Cylinders	Two, outside
Cylinder size	17 in × 24 in (432 mm × 610 mm)
Tractive effort
Performance figures
Tractive effort	21,250 lbf (94.5 kN)
Operators
Career
Operators	Great Western Railway; British Railways;
Class	4500
Power class	GWR: C; BR: 4MT;
Axle load class	GWR: Yellow
Locale	Western Region
Withdrawn	February 1950 – September 1964
Disposition	Three preserved, remainder scrapped

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

History edit

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 edit

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 edit

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 edit

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 edit

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 edit

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.

References edit

^ 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.
^ le Fleming (1962), pp. J46–J50.
^ Holcroft (1957), p. 44.
^ Allcock et al. (1968), pp. 23, 31–32, 34.
^ MacDermot (1931), p. 436.
^ ^a ^b Allcock et al. (1951), p. 13.
^ Davies et al. (1966), p. K248.
^ ^a ^b le Fleming (1962), p. J48.
^ MacDermot (1931), p. 443.
^ Davies et al. (1966), p. K242.
^ Davies et al. (1966), pp. K247, K252.
^ "South Devon Railway | Locomotives | Gone but not forgotten | GWR 2-6-2T No 4555".
^ "The Locomotives - WSRA". Archived from the original on 14 October 2013.
^ "SVR - Meet the Loco". Archived from the original on 6 January 2014.

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.