What is British Rail Class 09?
{{Infobox Locomotive |name = British Rail Class 09 |powertype = Diesel-electric |image = 09012 at Brighton.jpg |caption = 09012 at [[Brighton station]] |roadnumber = D3665–D3671, D3719–D3721, D4099–D4114;<br>later 09001–09026 |builder = [[British Railways]]' [[Darlington Works]], [[Horwich Works]] |build date = 1959, 1961 |gauge = {{RailGauge|ussg|lk=on|al=on}} |primemover = [[English Electric diesel engines|English Electric 6KT]] |transmission = DC generator, DC traction motors, double reduction gearing |tractionmotors = [[English Electric]] 506, 2 off |whytetype = [[0-6-0]] |uicclass = C |wheeldiameter = {{convert|4|ft|6|in|m|3|abbr=on}} |minimumcurve = {{convert|3.5|chain|m|lk=on}} |trainbrakes = originally vacuum, later dual, some now air only |locobrakeforce = {{convert|19|LTf|kN|sigfig=3|abbr=on|lk=in}} |wheelbase = {{convert|11|ft|6|in|m|2|abbr=on}} |length = {{convert|29|ft|3|in|m|2|abbr=on}} |width = {{convert|8|ft|6|in|m|2|abbr=on}} |height = {{convert|12|ft|8+1/2|in|m|2|abbr=on}} |locoweight = {{convert|49|LT|sigfig=3|lk=on}} |topspeed = {{convert|27.5|mph|km/h|1|abbr=on|lk=on}} |poweroutput = ''Engine:'' {{convert|350|hp|0|abbr=on|lk=on}} |tractiveeffort = ''Maximum:'' {{convert|35000|lbf|kN|1|abbr=on|lk=on}}<br>''Continuous:'' {{convert|8800|lbf|kN|1|abbr=on}} |fuelcap = {{convert|668|impgal|abbr=on|lk=on}} |trainheating = None |multipleworking = |axleloadclass = [[Route availability|RA]] 5 |railroad = British Rail |retiredate = }} The [[British Rail]] '''Class 09''' is a class of [[0-6-0]] [[diesel locomotive]] designed primarily for [[shunt (railway operations)|shunting]] but also short distance freight trips along branch lines.<ref>{{cite web|url=http://www.semgonline.com/diesel/class09.html|title=Class 09|first=|last=|work=semgonline.com|year=2011|accessdate=24 July 2012}}</ref> For this reason, though similar to the existing [[British Rail Class 08|Class 08]] shunting locomotives, Class 09s were re-geared to give a maximum top speed of 27.5&nbsp;mph (44&nbsp;km/h) at the ex