GWR 4575 Class
|GWR 4575 class|
|Builder||GWR Swindon Works|
|Order number||Lots 242, 249, 251, 253|
|UIC classification||1'C1' ht|
|Gauge||4 ft 8 1⁄2 in (1,435 mm)|
|3 ft 2 in (0.965 m)|
|Driver diameter||4 ft 7 1⁄2 in (1.410 m)|
|3 ft 2 in (0.965 m)|
|Minimum curve||5 chains (330 ft; 100 m) normal,
4.5 chains (300 ft; 91 m) slow
|Wheelbase||26 ft 10 in (8.18 m)|
|Length||36 ft 4 1⁄2 in (11.09 m) over buffers|
|Width||8 ft 9 in (2.67 m)|
|Height||13 ft 0 in (3.96 m)|
|Axle load||15 tons 11 cwt (34,800 lb or 15.8 t) full|
|Weight on drivers||46 tons 5 cwt (103,600 lb or 47 t) full|
|Locomotive weight||61 tons 0 cwt (136,600 lb or 62 t) full|
|Water capacity||1,300 imp gal (5,900 l; 1,600 US gal)|
|Boiler pressure||200 lbf/in2 (1.38 MPa)|
|Firegrate area||16.6 sq ft (1.54 m2)|
|992.51 sq ft (92.207 m2)|
|– Firebox||94.25 sq ft (8.756 m2)|
|Superheater type||4-element or 6-element|
|Superheater area||4-element: 52.98 sq ft (4.922 m2),
6-element: 69.84 sq ft (6.488 m2)
|Cylinder size||17 in × 24 in (432 mm × 610 mm)|
|Valve type||Piston valves|
|Tractive effort||21,250 lbf (94.5 kN)|
|Operator(s)||GWR » BR|
|Power class||GWR: C,
|Number in class||100|
|Axle load class||GWR: Yellow|
|Preserved||4588, 5521, 5526, 5532, 5538, 5539, 5541, 5542, 5552, 5553, 5572|
|Disposition||11 preserved, remainder scrapped|
They were designed as small mixed traffic branch locomotives, mainly used on branch lines. They were a development of Churchward's 4500 Class with larger side tanks and increased water capacity. 100 were built numbered 4575–4599 and 5500–5574. A number were fitted with auto apparatus in 1953 to enable them to run push-pull trains on South Wales lines with auto trailers.
No fewer than 11 of these tank engines survived:
|Number and name||Home||Status||Image|
|4588 Trojan||Dartmouth Steam Railway||Has run in preservation, but currently out of service requiring and for sale. |
|5521/L.150||Bluebell Railway||No. 5521 was built at Swindon in 1927 and spent most of its working life on branch lines in the West Country. After withdrawal, having run just over a million miles, it spent time at Barry and Bishops Lydeard before Richard and William Parker bought it in 1980. It moved first to the Dean Forest Railway, then to the industrial estate in Lydney, then to Swindon Works, then to the Swindon & Cricklade Railway and back again to the DFR before it was finally restored at The Flour Mill in the Forest of Dean from 2004 to 2007. In April 2007, 5521 went by sea from Hull to Gdynia in Poland via Helsinki and featured in the Wolsztyn Parade. It then travelled to Budapest, Hungary where it worked intermittently with MAV Nosztalgia, the heritage rail operator. In September 2007 it piloted the Venice Simplon-Orient-Express from Budapest Keleti to Kelenfold stations on its return from Istanbul to Venice before competing in the Zvolen Grand Prix in Slovakia and the Central European Steam Locomotive Grand Prix at the Railway Heritage Park in Budapest. It returned to Poland and in May 2008 again appeared in the Wolsztyn Parade before operating suburban services from Wroclaw to Jelcz Laskowice, to the timings of the electric multiple units it was replacing, for several periods of up to nine days at a time, each with 36 scheduled stops and starts.
In 2009 it returned to England after appearing at the Wolsztyn Parade for the third time. Since then, it has visited many preserved lines across the country. In May 2013, at the request of London Underground, the locomotive was painted in red London Transport livery and numbered L.150, to commemorate the 150th anniversary of the Metropolitan line, and between 25-27 May it operated special trains between Harrow-on-the-Hill and Amersham, along with Met 1, 9466 and Sarah Siddons. The locomotive is currently on loan to the Bluebell Railway until summer 2014. 
|5526||South Devon Railway||At the South Devon Railway undergoing an overhaul.|
|5532||Llangollen Railway||Under restoration. |
|5538||The Flour Mill, Forest of Dean, Gloucestershire||Under restoration. Previously displayed in Barry Island. |
|5539||Llangollen Railway||Under restoration. Previously part of the Barry Ten until 2006. |
|5541||Dean Forest Railway||Currently operational. Boiler ticket expires in 2023. |
|5542||Gloucestershire Warwickshire Railway||Currently operational. This locomotive has visited several preserved railways throughout her preservation career. Boiler ticket expires in 2022.|
|5552||Bodmin and Wenford Railway||Has run in preservation and is currently under overhaul.|
|5553||West Somerset Railway||Under overhaul at LNWR Heritage, Crewe. Number 5553 was the last steam engine to leave Woodham Brothers scrapyard in Barry, Vale of Glamorgan, South Wales, in January 1990.|
|5572||Didcot Railway Centre||On static display awaiting overhaul. |
One of these locomotives with the GWR Shirtbutton logo was featured in the train chase sequence from the 1978 Disney film Candleshoe.
Models and Toys
Lima made a model of the 4575 class, number 4589, in GWR green, also a British Railways black-liveried version, running number 5574. Bachmann Branchline have for many years made various versions of the 4575 Class.
- Whitehurst, Brian (1973). Great Western engines, names, numbers, types, classes: 1940 to preservation. Oxford: Oxford Publishing Company. pp. 40–41, 50, 102, 137. ISBN 0-902888-21-8. OCLC 815661.
- le Fleming, H.M. (February 1962). White, D.E., ed. The Locomotives of the Great Western Railway, part nine: Standard Two-Cylinder Classes. RCTS. p. J46-J50.
- "South Devon Railway 4588 page".
- "The Flour Mill 5521 page".
- "South Devon Railway | Great Western Railway 2-6-2T 4575 class locomotive no 5526".
- "Llangollen Railway 5532 Page".
- "The Flour Mill Projects page".
- "Llangollen Railway 5539 Page".
- "Dean Forest Railway 5541 Page".
- "5542 Web site".
- "Bodmin and Wenford Stock List - 5552".
- "5572 - 2-6-2T".
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