View source for GWR 5700 Class

{{no footnotes|date=March 2012}}
{{Infobox Locomotive
|name=Great Western Railway 5700 class
|powertype=Steam
|image=GWR 4612 at Bodmin General.JPG
|caption=GWR 5700 Class no. 4612,<br>as preserved on the [[Bodmin & Wenford Railway]].
|designer=[[Charles Collett]]
|builddate=1929–1950
|totalproduction=863
|builder=GWR [[Swindon Works]] (585);<br>[[Armstrong Whitworth]] (25);<br>[[W. G. Bagnall]] (100);<br>[[Beyer, Peacock and Company|Beyer, Peacock & Co.]] (25);<br>[[Kerr Stuart]] (25);<br>[[North British Locomotive Company|North British Locomotive]] (75);<br>[[Yorkshire Engine Company|Yorkshire Engine Co.]] (25)
|whytetype=[[0-6-0PT]]
|uicclass = C nt
|gauge = {{RailGauge|ussg}}
|driverdiameter={{convert|4|ft|7+1/2|in|m|3|abbr=on}}
|wheelbase = {{convert|15|ft|6|in|m|2|abbr=on}}
|length = {{convert|31|ft|2|in|m|2|abbr=on}} over buffers
|width = {{convert|8|ft|6|in|m|2|abbr=on}}
|height = {{convert|12|ft|3|in|m|2|abbr=on}} <!-- 12 ft 3-1/16 in actually, but convert can't handle it. -->
|axleload = {{convert|16.5|LT}} full
|locoweight =  {{convert|47.50|LT}} full
|fueltype = Coal
|fuelcap = 
|watercap = {{convert|1200|impgal|abbr=on}}
|firearea = {{convert|15.3|sqft|m2|abbr=on}}
|fireboxarea = {{convert|102.3|sqft|m2|abbr=on}}
|tubearea = {{convert|1075.7|sqft|m2|abbr=on}}
|totalsurface = {{convert|1178.0|sqft|m2|abbr=on}}
|boilerpressure={{convert|200|lbf/in2|MPa|2|abbr=on}}
|cylindercount=Two, inside
|cylindersize={{convert|17.5|x|24|in|mm|0|abbr=on}}
|valvegear=[[Stephenson valve gear|Stephenson]]
|valvetype=Slide valves
|tractiveeffort={{convert|22515|lbf|kN|2|abbr=on}}
|railroad = [[Great Western Railway|GWR]] » [[British Railways|BR]]
|powerclass = GWR: C,<br>BR: 3F
|axleloadclass = GWR: Blue until 1950, then Yellow
|withdrawndate = 1956–1966
|preservedunits = 
|disposition = 16 preserved, remainder scrapped
}}
<!-- [[Image:9729-at-Highbridge-Yard-a.jpg|thumb|right|9729 at Highbridge Yard after the Western Region had taken over the [[Somerset and Dorset Joint Railway|S&D]].]] --><!-- Hide deleted image -->
The [[Great Western Railway]] (GWR) '''5700 Class''' is a class of [[0-6-0]] [[pannier tank]] [[steam locomotive]], built between 1929 and 1950. 863 were built, making them the one of the most numerous classes of British steam locomotive.

== Overview ==
The GWR had favoured pannier tank locomotives since 1911 when they had started rebuilding [[saddle tank (locomotive)|saddle tank]] locomotives built between 1870 and 1905 into this style. By 1929 these older locomotives were in need of replacement.

The first 5700s were almost identical in appearance to several of the older converted locos (e.g. classes 645, 1701, 1854, 2721) and had round spectacles (windows) in the cab front, but those built after 1933 from no. 8750 onwards had rectangular windows and a slightly different cab profile virtually identical to the style introduced with the [[GWR 5400 Class|5400 Class]] in 1931.  Whilst they can be viewed as a simple update of the [[GWR 2721 Class|2721 Class]], the Collett improvements were worthwhile and the class became as synonymous with the GWR as [[GWR Castle Class|Castles]] and [[GWR King Class|Kings]], lasting until the end of steam on the [[Western Region of British Railways]].

The size of the class demanded that the 5700 class locomotives were spread across several series of numbers.

*3600 - 3699
*3700 - 3799
*4600 - 4699
*5700 - 5799
*6700 - 6779
*7700 - 7799
*8700 - 8799
*9600 - 9682
*9701 - 9799

Most were built at [[Swindon Works]], but about 25% were built by private builders:-

*[[Armstrong Whitworth]] – 7775–7799 (25)
*[[W. G. Bagnall]] – 6700–6724, 8725–8749, 8400–8449 (100)
*[[Beyer, Peacock and Company|Beyer, Peacock & Co.]] – 8700–8724 (25)
*[[Kerr Stuart]] - 7700–7724 (25)
*[[North British Locomotive Company|North British]] – 5700–5749, 7725–7749 (75)
*[[Yorkshire Engine Company|Yorkshire Engine Co.]] – 6725–6749 (25)

== Other pannier tank locomotives ==
There were numerous other classes of pannier tanks built by the GWR.  They fundamentally belonged to only two "families" of "large" and "small" designs, excluding some absorbed stock and even a few conversions of tender locos.  The two groups were:-

*  "Large" group originally featuring saddle tanks (or in a few cases side tanks), 4'6" driving wheels and double frames e.g. [[GWR 1076 Class|1076 Class]] or inside frames [[GWR 645 Class]], culminating in the [[GWR 9400 Class|94xx]]
*  "Small" group originally built at [[Wolverhampton railway works|Wolverhampton Works]] with saddle tanks and driving wheels of 4&nbsp;ft commencing with the [[GWR 850 Class]] and culminating in the [[GWR 1600 Class|BR 16xx]]

For example within the "small" group, the [[GWR 5400 Class]] locomotives were derived from the William Dean -designed [[GWR 2021 Class]] (an enlargement of the [[GWR 850 Class|850 Class]]), with larger wheels for higher top speed and fitted with [[GWR Autotrain|autotrain]] apparatus ('auto-fitted') for [[Push-pull train|push-pull]] passenger work. The [[GWR 6400 Class]] were similar to the 5400 Class, also being auto-fitted, but having the same size wheels as the 5700.  The [[GWR 7400 Class]] were very similar to the 6400 Class, but were not auto-fitted and had a higher boiler pressure.

Within the "large" group, the [[GWR 9400 Class]] was the post-war updated design of the 8750 variant of the 57xx: heavier and longer, but nominally no more powerful, using the same taper boiler as the [[GWR 2251 Class]].

For a list of classes, see [[GWR 0-6-0PT]].

== The 9700 Class ==
[[Image:GWR 9700 Class (maybe).jpg|thumb|right|11 engines of the 5700 Class, nos 9700-10 were turned out with various modifications for working along the [[Metropolitan Line]].]]
The 9700 Class Pannier Tanks were a direct development of the '''5700 Class'''. The prototype for the class, No.8700 (later 9700), was a rebuilt '''5700''' locomotive. They were specifically for working on the [[Metropolitan Railway|Metropolitan]]/[[Hammersmith & City Line|Hammersmith & City]] lines between Paddington Stations and [[Smithfield, London|Smithfield]] Meat Market. They replaced 'Metro' and '633' class locomotives.

The eleven locomotives in the class had [[Condensing steam locomotive|condensing apparatus]] that fed the exhaust steam back into the water tanks. The tanks themselves were shortened to make room for the external exhaust pipes and were extended down to the footplate in front of the cab to increase their capacity. As condensing the steam heated the water, a reciprocating pump [[Weir Group|(Weir pump)]] was fitted as a [[boiler feedwater pump]] because standard [[injector]]s will not work with hot water. The pumps led to (unsuccessful) tests with these locomotives acting as [[fire apparatus|fire engines]] during [[World War II]].

To work over the electrified underground lines, the 9700 Class locomotives had a special type of [[GWR ATC|ATC]] equipment that lifted clear of the centre rail and had [[Train stop|tripcock]] brake valves that matched the London Transport signalling system.
{{-}}

== Use after British Railways ==

A number of 5700s were sold for further use after being withdrawn by British Railways. The [[National Coal Board]] bought a few (at least six) but the best known are those bought by [[London Transport Executive|London Transport]].

=== London Transport ===
Eleven 5700s were bought by London Transport and used on the London underground network starting in 1956. They replaced older [[London Underground steam locomotives|LT steam locomotives]] on [[permanent way]] trains and were never used on normal passenger services. Main line running included trips between depots, to [[Acton Works]] and runs out to Croxley Tip, near Watford. A further two locomotives were later bought to replace classmates that were withdrawn in need of major repairs.

The [[Train stop|tripcock]] brake valve system was fitted to these locomotives and worked on the vacuum system, stopping the locomotives whether or not they were pulling a train.

They were numbered L89 to L99 and were allocated to the depots at Lillie Bridge (Kensington) and Neasden. Only eleven were running at any one time, the original L90 being withdrawn for repairs but scrapped instead and replaced by another locomotive which carried the same number.

The LT 5700s lasted until the end of steam on London Transport in 1971. [[London Underground diesel locomotives#DL81-DL83|Three diesel locomotives]] were bought to carry out the shunting duties from then on.

[[File:LT loco L92 in 1969.jpg|thumb|right|LT No. L95, 50 years old, shunts at Croxley Tip in autumn 1969]]

{|class="wikitable"
!colspan=6 align-center|GWR 5700s on London Transport
|-
!LT Number
!GWR/BR No.
!Date Built
!Date to LT
!Withdrawn by LT
!Notes
|-
|L89
|5775
|1929
|1963
|1969
|Preserved
|-
|L90 (I)
|7711
|1930
|1956
|1961
|
|-
|L90 (II)
|7760
|1930
|1961
|1971
|Preserved
|-
|L91 (I)
|5752
|1929
|1956
|1960
|
|-
|L91 (II)
|5757
|1929
|1960
|1968
|
|-
|L92
|5786
|1930
|1958
|1969
|Preserved
|-
|L93
|7779
|1930
|1958
|1968
|
|-
|L94
|7752
|1930
|1959
|1971
|Preserved
|-
|L95
|5764
|1929
|1960
|1971
|Preserved
|-
|L96
|7741
|1930
|1961
|1967
|
|-
|L97
|7749
|1930
|1962
|1970
|
|-
|L98
|7739
|1929
|1962
|1970
|
|-
|L99
|7715
|1930
|1963
|1969
|Preserved
|}

{{-}}

=== National Coal Board ===
The last 5700 in service, no. 7754, was at [[Deep Duffryn Colliery]] at [[Mountain Ash, Rhondda Cynon Taf|Mountain Ash]], where it was working well into the 1970s, and could still be seen on shed in 1980.

== Preservation ==
[[File:London Transport L99 & City of Truro at Sheringham.jpg|thumb|right|250px|GWR 5700 Class No.7715 painted as [[London Transport Executive|London Transport]] L99, plus [[GWR 3700 Class 3440 City of Truro|GWR 3700 Class 3440 ''City of Truro'']] at [[Sheringham (North Norfolk Railway) railway station|Sheringham]] on the [[North Norfolk Railway]] in Spring 2011]]
Sixteen 5700 class locomotives have been preserved, of which 8 are currently operational, with 2 of these being certified to run on [[Network Rail]].

As the oldest locomotives were the first to be withdrawn and sold for further use, they form the majority of preserved examples. A number of those bought from London Transport were still in running order and were used on preserved lines with minimal work. Interestingly, 5764 (ex-LT L95) was steamed the day it arrived at Bridgnorth on the [[Severn Valley Railway]], being lit-up before it had been removed from the low-loader on which it was delivered.

Several preserved locomotives have run in London Transport (LT) colours but 7715/L99 has been consistently so painted. At present, 7752/L94 has been painted in LT colours and has now returned to service at Tyseley.
{{clear}}
{|class="wikitable"
!colspan=6 align-center|GWR 5700s in Preservation
|-
!GWR/BR No.
!Image
!Date Built
!Built by
!Current Location /<br>Status
!Notes
|-
|3650
|[[File:3650 Didcot Railway Centre.jpg|120px]]
|1939
|[[Swindon Works|Swindon]]
|[[Didcot Railway Centre]] - Operational.
|
|-
|3738
|[[File:3738 Didcot Railway Centre (6).jpg|120px]]
|1937
|Swindon
|[[Didcot Railway Centre]] - static display due to firebox repair and a boiler crack
|
|-
|4612
|[[File:GWR 4612 at Bodmin General.JPG|120px]]
|1942
|Swindon
|[[Bodmin and Wenford Railway]] - Operational.
|
|-
|5764
|[[Image:Thumbs up from 5764 driver at Bewdley.JPG|120px]]
|1929
|Swindon
|[[Severn Valley Railway]]<br> – Out of service pending static display.
|Ex-LT L95
|-
|5775
|[[File:DUCK Museum Oxenhope.jpg|120px]]
|1929
|Swindon
|[[Keighley and Worth Valley Railway]] - Static Display.
|Ex-LT L89
|-
|5786
|[[File:5786 South Devon Railway.jpg|120px]]
|1930
|Swindon
|[[South Devon Railway Trust|South Devon Railway]]<br> – Operational as L92.
|Ex-LT L92
|-
|7714
|[[File:GWR Pannier 7714.JPG|120px]]
|1930
|[[Kerr Stuart]]
|[[Severn Valley Railway]]<br> – Undergoing Overhaul.
|Ex-NCB
|-
|7715
|[[File:GWR 7715.JPG|120px]]
|1930
|Kerr Stuart
|[[Buckinghamshire Railway Centre]]<br> - Undergoing Overhaul at the [[Llangollen Railway]].
|Ex-LT L99
|-
|7752
|[[File:LT94 Tyseley.jpg|120px]]
|1930
|[[North British Locomotive Company|North British Loco]]
|[[Tyseley Locomotive Works|Tyseley]] - Operational (Main Line Certified) as L94.
|Ex-LT L94
|-
|7754
|[[Image:GWR 5700 Class 7754 at York Railfest.JPG|120px]]
|1930
|North British Locomotive Company|North British Loco
|[[Llangollen Railway]] - Undergoing Overhaul.
|Ex-NCB
|-
|7760
|[[File:7760 and 7752 Tyseley.jpg|120px]]
|1930
|North British Locomotive Company|North British Loco
|[[Tyseley Locomotive Works|Tyseley]] - For Sale. Awaiting Overhaul.
|Ex-LT L90
|-
|9600
|[[File:9600 Tyseley (2).jpg|120px]]
|1945
|Swindon
|[[Tyseley Locomotive Works|Tyseley]]<br> – Operational (Main Line Certified).
|Ex-NCB
|-
|9629
|
|1945
|Swindon
|[[Pontypool and Blaenavon Railway|Pontypool]] - Undergoing restoration.
|
|-
|9642
|[[File:Pannier (389214545) (2).jpg|120px|alt=In 1965]]
|1946
|Swindon
|[[Gloucestershire Warwickshire Railway]] - Undergoing overhaul.
|
|-
|9681
|[[File:9681 sits at Parkend.JPG|120px]]
|1949
|Swindon
|[[Dean Forest Railway]] - Operational.
|
|-
|9682
|[[File:Waiting at the Platform, Chinnor Station - geograph.org.uk - 987613.jpg|120px]]
|1949
|Swindon
|[[Chinnor and Princes Risborough Railway|Chinnor & Princes Risborough]] - Undergoing overhaul.
|
|}

==In fiction==
{{unreferenced|section|date=June 2012}}
5775 on the [[Keighley and Worth Valley Railway]] featured in the film [[The Railway Children (film)|The Railway Children]] painted brown and lettered for the "Great Northern and Southern Railway".

"[[Duck the Great Western Engine]]" in [[The Railway Series]] books by the [[Wilbert Awdry|Rev. W Awdry]] and the TV series [[Thomas & Friends|Thomas the Tank Engine and Friends]] is a 5700 Class pannier tank- His number was 5741.

No. 5764 appeared several times in the 1976 BBC television adaptation of [[Charles Dickens]]' short ghost story, ''[[The Signal-Man]]''.

== Models ==
{{unreferenced|section|date=July 2012}}
[[Graham Farish]] manufacture a model of the 57xx in [[N scale]].

Dapol Models have announced the release of the 57xx in N scale, due for release in September 2012

Bachmann has made 00 gauge Panniers, in 5700 class and the 8750 class also in the livery of all types as well.

== See also ==
* [[GWR 0-6-0PT]] – ''list of classes of GWR 0-6-0 pannier tank, including table of preserved locomotives''

== References ==
*{{cite book |title=The last years of Metropolitan Steam |first=H. C. |last=Casserley }}
*{{cite book |title=Severn Valley Locomotives as they were |first=Tom |last=Ferris |year=1995 }}
*{{cite book |title=Keighley & Worth Valley Locomotives as they were |first=Tom |last=Heavyside |year=1996 }}
*{{cite book |title=A pictorial Record of Great Western Engines |first=J. H. |last=Russell |year=1975 }}
*{{0-902888-21-8|pages=32–34, 41–42, 51–52, 59–60, 67–68, 71–72, 74–76, 101–102, 146}}
*{{cite book |title=Locomotives Illustrated no. 39 Gwr pannier tanks post 1923 |first=Michael |last=Harris }}

== External links ==
{{commons category|GWR 5700 Class}}
* http://www.greatwestern.org.uk/m_in_060_5700.htm
* [http://www.gwr.org.uk/nopanniers.html Guide to GWR Pannier Tank Classes]

{{GWR Locomotives}}

[[Category:Great Western Railway locomotives|5700]]
[[Category:0-6-0PT locomotives]]
[[Category:Armstrong Whitworth locomotives]]
[[Category:Bagnall locomotives]]
[[Category:Beyer, Peacock locomotives]]
[[Category:Kerr Stuart locomotives]]
[[Category:NBL locomotives]]
[[Category:YEC locomotives]]
[[Category:Railway locomotives introduced in 1929]]