What is British Rail Class 11?
{{Infobox Locomotive |name = British Rail Class 11 |powertype = Diesel-electric |image = |caption = |builder = [[Derby Works|LMS/BR Derby]] & [[Darlington Works|BR Darlington]] |builddate = 1945–1952 |roadnumber = WD: 70260–70273<br>LMS: 7120–7129<br> BR: 12033–12138 |totalproduction = 120 |numinclass = WD: 14 (10 to NS)<br>LMS/BR: 106 |gauge = {{RailGauge|ussg|lk=on|al=on}} |primemover = [[English Electric diesel engines|English Electric 6KT]] |cylindercount = [[Straight 6]] |transmission = DC generator, DC traction motors, double reduction gearing |tractionmotors = [[English Electric]] 506, 2 off |generator = English Electric 801 — 441 A, 430 V |whytetype = [[0-6-0]] |uicclass = C |wheeldiameter = {{convert|4|ft|0+1/2|in|m|3|abbr=on}} |minimumcurve = {{convert|3.5|chain|m|lk=on}} |trainbrakes = Vacuum |locobrakeforce = {{convert|32.2|LTf|sigfig=3|abbr=on|lk=in}} |wheelbase = {{convert|11|ft|6|in|m|2|abbr=on}} |length = {{convert|29|ft|1+1/2|in|m|2|abbr=on}} |width = {{convert|8|ft|5|in|m|2|abbr=on}} |height = {{convert|12|ft|5+1/2|in|m|2|abbr=on}} |locoweight = {{convert|47.4|LT|sigfig=3|lk=on}} |topspeed = {{convert|20|mph|km/h|abbr=on|lk=on}} |poweroutput = ''Engine:'' {{convert|350|hp|0|abbr=on|lk=on}} |tractiveeffort = ''Maximum:'' {{convert|34900|lbf|kN|1|abbr=on|lk=on}} |fuelcap = {{convert|660|impgal|abbr=on|lk=on}} |axleloadclass = [[Route availability|RA]] 5 |trainheating = None |multipleworking = Not fitted |railroad = [[War Department (United Kingdom)|War Department]]<br>[[Nederlandse Spoorwegen]] (NS)<br>[[London, Midland and Scottish Railway]]<br>[[British Railways]]<br>[[Harry Needle Railroad Company|HNRC]]<br>heritage railways }} The [[British Rail]] '''Class 11''' is a [[Diesel locomotive|diesel]] [[Switcher|shunting locomotive]] built from April 1945 to December 1952. They are based on [[British Rail Class D3/6|a similar earlier batch]] built by the [[London, Midland and Scottish Railway]] (LMS) between 1934 and 1936. {{British Rail Locomotives}} {{Transport-stu