View source for British Rail Class 11

{{Short description|Class of 120 350hp diesel-electric shunters}}
{{Use dmy dates|date=February 2015}}
{{Use British English|date=February 2015}}
{{Infobox locomotive
|name = British Rail Class 11
|powertype = Diesel-electric
|image = LMS English Electric 350hp diesel shunter 12104 (8312217300).jpg
|caption = 12104 at [[Stratford TMD|Stratford MPD]] in July 1967
|builder = [[Derby Works|LMS/BR Derby]] & [[Darlington Works|BR Darlington]]
|builddate = 1945–1952
|totalproduction = 120
|gauge = {{RailGauge|ussg|allk=on}}
|primemover = [[English Electric diesel engines|English Electric 6KT]]
|cylindercount = [[Straight 6]]
|transmission  = [[Diesel-electric transmission|Diesel-electric]], [[double reduction gearing]]
|tractionmotors = [[English Electric]] 506, DC, 2 off
|generator = English Electric 801 — 441 A, 430 V [[Direct current|DC]]
|whytetype = {{whyte|0-6-0|DE}}
|uicclass = C
|wheeldiameter = {{convert|4|ft|0+1/2|in|m|3|abbr=on}}
|minimumcurve = {{convert|3.5|chain|m|2|lk=on}}
|locobrakes = [[Railway airbrake|Air]]
|locobrakeforce = {{convert|32.2|LTf|sigfig=3|abbr=on|lk=in}}
|wheelbase = {{convert|11|ft|6|in|m|3|abbr=on}}
|length    = {{convert|29|ft|1+1/2|in|m|2|abbr=on}}
|width     = {{convert|8|ft|5|in|m|3|abbr=on}}
|height    = {{convert|12|ft|5+1/2|in|m|3|abbr=on}}
|locoweight= {{convert|47.4|LT|t ST|sigfig=3|lk=on}}
|maxspeed  = {{convert|20|mph|km/h|abbr=on}}
|poweroutput = ''Engine:'' {{convert|350|hp|0|abbr=on|lk=in}}
|tractiveeffort = ''Maximum:'' {{convert|34900|lbf|kN|1|abbr=on|lk=on}}
|fuelcap  = {{convert|660|impgal|abbr=on}}
|axleloadclass = [[Route availability|RA]] 5
|trainheating = None
|multipleworking = Not fitted
|operator = {{ubl|[[War Department (United Kingdom)|War Department]]|[[Danske Statsbaner]] (DSB)|[[Nederlandse Spoorwegen]] (NS)|[[London, Midland and Scottish Railway]]|[[British Railways]]|[[National Coal Board]]|[[Harry Needle Railroad Company|HNRC]]|Imperial Chemical Industries (ICI)}}
|numinclass = {{ubl|WD: 14 (10 to NS)|LMS/BR: 106}}
|fleetnumbers = {{ubl|WD: 70260–70273|LMS: 7120–7129|BR: 12033–12138}}
|withdrawndate = 1967–1972
|disposition=9 currently preserved, 1 destroyed in preservation, remainder scrapped
}}
The '''British Rail Class 11''' was applied to a batch of [[Diesel locomotive|diesel]] [[Switcher|shunting locomotives]] built from April 1945 to December 1952, based on [[British Rail Class D3/6|a similar earlier batch]] built by the [[London, Midland and Scottish Railway]] (LMS) between 1934 and 1936.

== Overview ==
===Numbering===
An initial batch of twenty locomotives was built during [[World War II]], fourteen of which were built for the [[War Department (United Kingdom)|War Department]], with the first ten of these (70260–70269) subsequently going to the [[Nederlandse Spoorwegen]] post-war as [[NS Class 600#Class 500|NS 501–510]]. LMS numbers 7120–7126 went straight into LMS stock, and a follow-up batch was built, 7129 being the last diesel shunter to be built for the LMS. [[British Railways]] continued to build the class from 1948 to 1952, using numbers M7130–M7131 and 12045–12138. 7120–7129 and M7130–M7131 became BR numbers 12033–12044. The whole class of 12033–12138 became Class 11. Locomotives up to 12102 were built at [[Derby Works|LMS/BR Derby]] and 12103–12138 at [[Darlington Works|BR Darlington]].

===Export locomotives===
{{main|NS Class 600|Victorian Railways F class (diesel)}}
Close to 100 almost identical machines were built by [[English Electric]] and supplied to [[Nederlandse Spoorwegen]] (NS) as its [[NS 500 Class|500 Class]] & [[NS Class 600|600 Class]] [[diesel locomotive]]s. In addition to the exported 501–510 mentioned above, 500 Class also included 511–545. Sixty-five of the 600 Class locomotives were built by English Electric between 1950 and 1957, numbered 601–665, at either [[Dick, Kerr & Co.]] Works (601–610) in [[Preston, Lancashire|Preston]] or [[Vulcan Foundry]] Works (remainder) in [[Newton-le-Willows]]. A further batch of 15 locomotives were exported without engines so that they could be fitted as such in the Netherlands. They were numbered 701–715.

Another export order was to [[Australia]], with 16 locomotives built in 1951 but with the design modified for use on [[5 ft 3 in gauge railways]]. The [[Victorian Railways]] bought ten, which were designated as [[Victorian Railways F class (diesel)|F class]], and six were bought by the [[State Electricity Commission of Victoria]] for shunting on sidings connected to Victorian Railways tracks.<ref>{{cite web |url=http://www.victorianrailways.net/motive%20power/fdie/fdie.html |title=F class d/e locomotives |publisher=www.victorianrailways.net |access-date=2008-08-10}}</ref>

One member of Class 11 was built for transporting British soldiers in the former Nazi-occupied countries. Throughout the liberation period it travelled through France, Belgium and the Netherlands before finally reaching Germany. It was then used for transporting British troops and for shunting, and was occasionally used on a few branch lines until 1957. The reason was that after the war the newly founded [[Deutsche Bundesbahn]] had to build up its locomotive fleet. As the more powerful German engines began to roll out, the Class 11 diesel was used less and, in 1953, it was withdrawn. It stood in Hamm Engine shed, in [[West Germany]], until it was bought by [[Danish State Railways]] in 1957. It was then renumbered to DSB ML 6 and liveried in the dark green of Danish diesel shunters. It served on shunting duties in [[Copenhagen]] yards until 1973, when it was finally withdrawn for good and scrapped in 1974, in [[Hedehusene]], Denmark.<ref>{{Cite web |url=https://www.jernbanen.dk/artikler.php?artno=21 |title=Rangerlokomotiv litra ML |website=www.jernbanen.dk}}</ref>

English Electric works numbers 1550 & 1551 were built in 1949 for Swedish State Railways, numbered 3 and 4 respectively. They were tested in harbour shunting in Gothenburg. They were later sent to northern Sweden and the ore loading harbour of Luleå. From there to a mine outside of Stockholm where they did service into 1992. Both are preserved at Bothnia Railway Museum in Luleå.

===Technical details===
The [[diesel engine]] is an English Electric 6-cylinder, 10-inch bore by 12-inch stroke (254&nbsp;mm by 305&nbsp;mm); 4-stroke, 6KT and the [[traction motor]]s are two: EE506 axle-hung, nose-suspended, force-ventilated traction motors with 21.7:1 double reduction gear drive.  The [[Electrical generator|main generator]] is an English Electric EE801, 441 A at 430 V.

==Withdrawal==
The 106 locomotives of British Railways were withdrawn between May 1967 and November 1972.
{| class="wikitable" style=text-align:center
|+ Table of withdrawals{{sfn|Strickland|1983|pp=51–52}}
! Year !! Quantity in<br>service at<br>start of year !! Quantity<br>withdrawn !! Locomotive numbers
|-
| 1967 || 106 ||  5 || align=left | 12068, 12104/07/23/29.
|-
| 1968 || 101 || 17 || align=left | 12034–37/39–44/72, 12119–20/24/26/37–38.
|-
| 1969 ||  84 || 24 || align=left | 12033/38/45–48/57/59/64/66–67/70/86/92/95,<br>12100/12/16{{efn|accident damage}}–17/25/31/33/35.
|-
| 1970 ||  60 || 11 || align=left | 12050/54/62/81/89/91, 12101/06/14–15/28.
|-
| 1971 ||  49 || 40 || align=left | 12049/51–53/55–56/58/60–61/65/69/71/73<br>12075–78/80/82–85/87–88/90/93–94/97–99,<br>12102–03/05/08/11/18/21–22/36.
|-
| 1972 ||   9 || 10 || align=left | 12063/74/79, 12103{{efn|reinstated January, withdrawn June}}/09–10/27/30/32/34.
|-
|}
{{notelist}}

==Post-BR use==
Sixteen locomotives were sold to the [[National Coal Board]], and were used in the [[North East England]], [[South Wales]] and the [[Kent Coalfield]].{{sfn|Strickland|1983|pp=52}}
{| class="wikitable"
|+
!Locomotive Number
!Company
!Disposition
|-
|12049
|Day & Son, Brentford Town Goods Depot<ref name=":0" />
|Scrapped
|-
|12052
|[[National Coal Board|National Coal Board (NCB)]], Widdrington Disposal Plant<ref name=":0" />
|Scrapped
|-
|12054
|A.R. Adams Ltd., Newport Docks<ref name=":0" />
|Scrapped
|-
|12060
|NCB, Philadelphia Loco Shed<ref name=":0" />
|Scrapped
|-
|12061
|NCB, Natgarw Coking Plant<ref name=":0" />
|Scrapped
|-
|12063
|NCB, Natgarw Coking Plant<ref name=":0" />
|Scrapped
|-
|12071
|NCB, Natgarw Coking Plant<ref name=":0" />
|Scrapped
|-
| rowspan="2" |12074
|NCB, Swalwell Disposal Point<ref name=":0" />
| rowspan="2" |Scrapped
|-
|[[Harry Needle Railroad Company|Harry Needle Railroad Company (HNRC)]]
|-
|12082
|U.K.F. Fertilisers Ltd., Ince Marshes<ref name=":0">{{Cite book|title=Industrial Locomotives 1982 including preserved and minor railway locomotives|publisher=Industrial Railway Society|year=1982|isbn=0-901096-43-1}}</ref>
|Scrapped
|-
|12083
|Tilcon Ltd., Swinden Limeworks, Skipton.<ref name=":0" />
|Preserved - [[Battlefield Line Railway|Battlefield Line]]
|-
|12084
|NCB, Bates Colliery<ref name=":0" />
|Scrapped
|-
| rowspan="2" |12088
|NCB, Swalwell Disposal Point<ref name=":0" />
| rowspan="2" |Preserved - [[Aln Valley Railway]]
|-
|HNRC
|-
|12093
|NCB, Widdrington Disposal Point<ref name=":0" />
|Scrapped
|-
| rowspan="2" |12098
|NCB, Philadelphia Loco Shed<ref name=":0" />
| rowspan="2" |Scrapped
|-
|HNRC
|-
|12099
|NCB, British Oak Disposal Point<ref name=":0" />
|Preserved - [[Severn Valley Railway]]
|-
|12119
|NCB, Philadelphia Loco Shed<ref name=":0" />
|Scrapped
|-
|12122
|NCB, British Oak Disposal Point<ref name=":0" />
|Scrapped
|-
|12131
|NCB, Snowdown Colliery<ref name=":0" />
|Preserved - [[North Norfolk Railway]]
|-
|12133
|NCB, Philadelphia Loco Shed<ref name=":0" />
|Scrapped
|}

==Preservation==
[[file:Bridgnorth - 12099 in the yard.JPG|thumb|right|12099 preserved on the Severn Valley Railway]]
Only one of the LMS examples is preserved being:
* AD601 at [[Lakeside and Haverthwaite Railway]]
The following BR examples of Class 11 diesel shunters are preserved:
* 12052 at [[Caledonian Railway (Brechin)|Caledonian Railway]]
* 12077 at [[Midland Railway – Butterley]]
* 12083 at [[Battlefield Line Railway]]
* 12088 at [[Aln Valley Railway]]
* 12093 at [[Caledonian Railway (Brechin)|Caledonian Railway]]
* 12099 at [[Severn Valley Railway]]
* 12131 at [[North Norfolk Railway]]
* A ninth example 12049 (renumbered from 12082) is preserved at the [[Watercress Line]] in [[Hampshire]]. At one time it was re-registered as 01553, in [[British Rail Class 01/5|TOPS Class 01/5]], carried both numbers and was owned by the [[Harry Needle Railroad Company]]. 12082 was renumbered to 12049 in October 2010 and painted in BR green with a late crest but without the yellow/black ends. This was as a replacement for the original [[Watercress Line|Mid-Hants]] locomotive 12049 that was scrapped after suffering catastrophic damage during an engine shed fire on 26 July 2010.<ref>{{cite web |url=http://www.wnxx.com/disposals/class11.htm |title=End of the Line: Disposals-Class 11 |publisher=www.wnxx.com |date=1 November 2010 |access-date=2024-03-30 |archive-url=https://web.archive.org/web/20120510195737/http://www.wnxx.com/disposals/class11.htm |archive-date=2012-05-10}}</ref>

==See also==
{{commons category|British Rail Class 11}}
* [[LMS diesel shunters]]
* [[Victorian Railways F class (diesel)|Victorian Railways F class diesel shunter]]

==Footnotes==
{{reflist}}

==References==
* {{Strickland Locomotive Directory|pages=51–52}}

==Further reading==
* {{cite book |last=McManus |first=Michael |title=Ultimate Allocations, British Railways Locomotives 1948 - 1968 |publisher=Wirral. Michael McManus }}

{{LMS Locomotives}}
{{British Rail Locomotives}}

[[Category:British Rail diesel locomotives|11]]
[[Category:English Electric locomotives]]
[[Category:C locomotives]]
[[Category:Railway locomotives introduced in 1945]]
[[Category:Standard-gauge locomotives of Great Britain]]
[[Category:Diesel–electric locomotives of Great Britain]]
[[Category:Shunting locomotives]]