| 词条 | GWR 4500 Class |
| 释义 |
|powertype = Steam |name = GWR 4500 Class |image = Hugh llewelyn 4566 (6901248518).jpg |caption = Preserved 4566 on the Severn Valley Railway |designer = George Jackson Churchward |builder = {{ubl|Wolverhampton Works (20)|Swindon Works (55)}} |serialnumber = {{ubl|Wolverhampton 775–794|Swindon: 2310–19, 2496–2505, 2597–2611}} |builddate = 1906–1924 |totalproduction = 75 |whytetype = 2-6-2T |gauge = {{track gauge|uksg|allk=on}} |leadingdiameter = |driverdiameter = {{convert|4|ft|7+1/2|in|3|abbr=on}} |trailingdiameter = |length = |locoweight = {{convert|57|LT|t ST|abbr=on}} |fueltype = Coal |fuelcap = |watercap = |firearea = |boilerpressure = {{convert|200|psi|MPa|abbr=on}} |tractiveeffort = {{convert|21250|lbf|kN|abbr=on}} |cylindercount = Two, outside |cylindersize = {{convert|17|x|24|in|0|abbr=on}} |operator = {{ubl|Great Western Railway|Western Region of British Railways}} |operatorclass = 4500 |powerclass = {{ubl|GWR: C|BR: 4MT}} |axleloadclass = GWR: Yellow |withdrawndate = 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. HistoryThey 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 {{Convert|60|mph|abbr=on}} in service.{{sfn|le Fleming|1962|pp=J46–J50}} 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.{{sfn|Holcroft|1957|p=44}} Of this batch 2168 (as 4507) was the last Wolverhampton-built loco to remain in service with BR, not being withdrawn until 1963.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. The 4575 Class was a later development with larger side tanks. PreservationThree 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 but, {{as of|2018|alt=currently in 2018}}, none are operational. 45554555 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. Currently named "Warrior", she last worked in 2007. Under restoration since 2014, including a new boiler being built at Tyseley Loco Works.[1] 4561This 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.[2] 4566Currently 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.[3] See also
References1. ^{{cite web |url=http://southdevonrailway.co.uk/gone-not-forgotten/4555 | title=South Devon Railway | Locomotives | Gone but not forgotten | GWR 2-6-2T No 4555}} 2. ^{{cite web | url=http://www.wsra.org.uk/activities/the-locomotives | title=The Locomotives - WSRA | deadurl=yes | archiveurl=https://web.archive.org/web/20131014165834/http://www.wsra.org.uk/activities/the-locomotives | archivedate=2013-10-14 | df= }} 3. ^{{cite web|url=http://www.svr.co.uk/MeetTheLoco.aspx?id=1 |title=SVR - Meet the Loco |deadurl=yes |archiveurl=https://web.archive.org/web/20140106174829/http://www.svr.co.uk/MeetTheLoco.aspx?id=1 |archivedate=2014-01-06 |df= }}
External links{{commons category|GWR 4500 Class}}
4 : Great Western Railway locomotives|2-6-2T locomotives|Standard gauge steam locomotives of Great Britain|Railway locomotives introduced in 1906 |
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