GWR 4575 Class
{{Short description|British steam locomotives}}
{{Use dmy dates|date=February 2018}}
{{Use British English|date=February 2018}}
{{Lead too short|date=August 2024}}
{{Infobox locomotive
| name = GWR 4575 class
| powertype = Steam
| image = Swindon 05 Works '4575' 2-6-2T freshly repaired geograph-2578471-by-Ben-Brooksbank.jpg
| caption = 4598 at Swindon Works in 1954
| designer = Charles Collett
| builder = GWR Swindon Works
| ordernumber = Lots 242, 249, 251, 253
| serialnumber =
| builddate = 1927–1929
| totalproduction = 100
| whytetype = 2-6-2T
| uicclass = 1′C1′ h2t
| gauge = {{track gauge|uksg|allk=on}}
| leadingdiameter = {{convert|3|ft|2|in|m|3|abbr=on}}
| driverdiameter = {{convert|4|ft|7+1/2|in|m|3|abbr=on}}
| trailingdiameter = {{convert|3|ft|2|in|m|3|abbr=on}}
| minimumcurve = {{convert|5|chain}} normal,
{{convert|4.5|chain}} slow
| wheelbase = {{convert|26|ft|10|in|m|2|abbr=on}}
| length = {{convert|36|ft|4+1/2|in|m|2|abbr=on}} over buffers
| width = {{convert|8|ft|9|in|m|3|abbr=on}}
| height = {{convert|13|ft|0|in|m|3|abbr=on}}
| axleload = {{long ton|15|11}}
({{convert|15|LT|11|Lcwt|ST|1|abbr=on|disp=output only}}) full
| weightondrivers = {{long ton|46|5}}
({{convert|46|LT|5|Lcwt|ST|1|abbr=on|disp=output only}}) full
| locoweight = {{long ton|61|0}}
({{convert|61|LT|0|Lcwt|ST|1|abbr=on|disp=output only}}) full
| fueltype = Coal
| fuelcap = {{long ton|3|14}}
| watercap = {{convert|1300|impgal|abbr=on}}
| boiler = GWR Standard No. 5{{sfnb|Champ|2018|p=319}}
| boilerpressure = {{convert|200|lbf/in2|MPa|2|abbr=on}}
| firearea = {{convert|16.6|sqft|m2|abbr=on}}
| tubearea = {{convert|992.51|sqft|m2|abbr=on}}
| fluearea =
| tubesandflues =
| fireboxarea = {{convert|94.25|sqft|m2|abbr=on}}
| totalsurface =
| superheatertype = 4-element or 6-element
| superheaterarea = 4-element: {{convert|52.98|sqft|m2|abbr=on}},
6-element: {{convert|69.84|sqft|m2|abbr=on}}
| cylindercount = Two, outside
| cylindersize = {{convert|17|x|24|in|mm|0|abbr=on}}
| valvegear = Stephenson
| valvetype = Piston valves
| valvetravel =
| valvelap =
| valvelead =
| transmission =
| maxspeed =
| poweroutput =
| tractiveeffort = {{convert|21250|lbf|kN|abbr=on}}
| factorofadhesion =
| trainheating =
| locobrakes =
| locobrakeforce =
| trainbrakes = Vacuum
| safety =
| operatorclass = 4575
| powerclass = GWR: C,
BR: 4MT
| numinclass = 100
| fleetnumbers = 4575–4599, 5500–5574
| officialname =
| nicknames = Small Prairie
| axleloadclass = GWR: Yellow
| locale =
| deliverydate =
| firstrundate =
| lastrundate =
| withdrawndate = 1956–1964
| preservedunits = 4588, 5521, 5526, 5532, 5538, 5539, 5541, 5542, 5552, 5553, 5572
| restoredate =
| scrapdate =
| currentowner =
| disposition = 11 preserved, remainder scrapped
}}
The Great Western Railway (GWR) 4575 Class is a class of 2-6-2T British steam locomotives.
History
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.{{sfnb|le Fleming|1962|pp=J46–J50}} 100 were built numbered 4575–4599 and 5500–5574. 15 (Nos. 4578/81/89, 5511/24/29/34/35/45/55/59/60/68/72/74) were fitted with auto apparatus in 1953 to enable them to run push-pull trains on South Wales lines with auto trailers.{{sfnb|le Fleming|1962|pp=J46–J50}}
They often are referred to as Small Prairie Class tank locomotives.
| class="wikitable" style="text-align:center"
|+ Table of orders and numbers{{sfnb|Allcock|Davies|le Fleming|Maskelyne|1968|p=35}} ! Year !! Quantity !! Lot No. !! Locomotive numbers !! Notes | ||||
| 1927 | 30 | 242 | 4575–4599, 5500–5504 | align="left" | |
| 1927 | 20 | 249 | 5505–5524 | align=left | |
| 1928 | 20 | 251 | 5525–5544 | align=left | |
| 1928–29 | 30 | 253 | 5545–5574 | align=left | |
Preservation
11 members of the class have been preserved:
Two members of the class have also briefly been out on the mainline: 5521 and 5572. 5521 was shipped to Poland in 2007 to take part in the Wolsztyn Parade, as well as briefly piloting the Orient Express. 5572 made an appearance at an open day in Reading as part of the GWR 150 celebrations in 1985, arriving under its own power. When returning to Didcot again under its own power the engine also hauled the replica broad gauge locomotive "Iron Duke" alongside the preserved GWR Railcar W22W.{{Citation needed|date=August 2024|reason=This whole paragraph needs references to reliable sources}}
Models and toys
{{No sources section|date=August 2024|find=GWR 4575 Class models}}
Lima made a model{{When|date=August 2024}} 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{{When|date=August 2024}} made various versions of the 4575 Class.
See also
References
{{Reflist}}
- {{RCTS-LocosGWR-1|year=1968}}
- {{Cite book|last=Champ|first=Jim |title=An Introduction to Great Western Locomotive Development |year=2018|publisher=Pen & Sword Transport |isbn=978-1-4738-7784-9|location=Barnsley |oclc=1029234106 |ol=26953051M }}
- {{cite book |last=le Fleming |first=H.M. |editor-last=White |editor-first=D.E. |title=The Locomotives of the Great Western Railway, part nine: Standard Two-Cylinder Classes |date=February 1962 |publisher=RCTS }}
- {{Whitehurst GW Engines from 1940|pages=40–41, 50, 102, 137}}
Further reading
- {{cite magazine|title=Small is beautiful|first=Evan|last=Green-Hughes|magazine=Hornby Magazine|pages=68–71|issue=9|date=March 2008|location=Hersham|publisher=Ian Allan Publishing|issn=1753-2469|oclc=226087101}}
External links
{{commons category|GWR 4575 Class}}
- [http://www.greatwestern.org.uk/m_in_262_4500.htm 4400 / 4500 tank classes]
- [http://www.railuk.info/steam/getsteamclass.php?item=4575 Class 4575 Details] at Rail UK
{{GWR Locomotives}}
Category:Railway locomotives introduced in 1927