What is British Rail Class D2/7?
{{Infobox Locomotive |name = British Rail Class D2/7 |powertype = Diesel-mechanical |image = Hudswell D707 at the Rutland Railway 05-09-25 31.jpeg |caption = |roadnumber = 11116–11120, 11144–11148; D2500–D2509 from 1958 to 1962 |builder = [[Hudswell Clarke]] |serialnumber = D898–D902, D938–D942 |builddate = 1955–1956 |gauge = {{RailGauge|ussg|lk=on}} |primemover = [[L. Gardner and Sons Ltd.|Gardner]] 8L3 |transmission = Mechanical, SSS Powerflow three-speed gearbox |whytetype = 0-6-0 DM |uicclass = C |wheeldiameter = {{convert|3|ft|6|in|m|3|abbr=on}} |minimumcurve = |trainbrakes = None |locobrakeforce = |wheelbase = |length = |width = |height = |locoweight = {{convert|36.35|LT|lk=on}} |topspeed = {{convert|14|mph|km/h|0|abbr=on|lk=on}} |poweroutput = ''Engine:'' {{convert|204|bhp|kW|abbr=on|lk=on}} |tractiveeffort = {{convert|16100|lbf|kN|1|abbr=on}} |fuelcap = |trainheating = None |multipleworking = Not fitted |axleloadclass = [[Route availability]] 4 |railroad = [[British Railways]] |railroadclass = D2/7; later 2/14; no TOPS class |retiredate = 1967 |disposition = All scrapped }} '''British Rail Class D2/7''' was a locomotive commissioned by [[British Rail]] in [[England]]. It was a [[Diesel engine|diesel powered]] locomotive in the pre-[[TOPS]] period. It was built by [[Hudswell Clarke]] with a [[L. Gardner and Sons Ltd.|Gardner]] engine. The mechanical transmission, used a scoop control [[fluid coupling]] and a three-speed ''Power-flow SSS'' (synchro-self-shifting) gearbox.<ref>{{Cite web |url=http://www.dmm-gallery.org.uk/colleng/4805-01.htm |title=Durham Mining Museum - Colliery Engineering |access-date=2009-01-13 |archive-date=2007-09-28 |archive-url=https://web.archive.org/web/20070928080416/http://www.dmm-gallery.org.uk/colleng/4805-01.htm |url-status=dead }}</ref> This type of gearbox was a Hudswell Clarke speciality. External photographs<ref>{{cite web | url=https://www.flickr.com/photos/64518788@N05/38296883025/ | title=D2500 | date=December 2017 }}</ref> ==References== {{