What is British Rail Class D1/1?
{{Infobox Locomotive |name = British Rail Class D1/1 |powertype = Diesel-mechanical |image = |caption = |roadnumber = 11500–11502; D2950–D2952 from 1957 to 1958 |builder = [[Hunslet Engine Company]] |builddate = 1954–1955 |serialnumber = 4625–4627 |toalproduction = 3 |gauge = {{RailGauge|ussg|lk=on|al=on}} |primemover = [[L Gardner and Sons Ltd|Gardner]] 6L3 |transmission = Mechanical, Hunslet four-speed gearbox |whytetype = 0-4-0dm |uicclass = B |wheeldiameter = {{convert|3|ft|4|in|m|3|abbr=on}} |minimumcurve = |trainbrakes = None |locobrakeforce = |wheelbase = |length = |width = |height = |locoweight = {{convert|22.45|LT|lk=on}} |topspeed = {{convert|14|mph|abbr=on|lk=on}} |poweroutput = ''Engine:'' {{convert|153|bhp|kW|0|abbr=on|lk=on}} |tractiveeffort = {{convert|10800|lbf|kN|1|abbr=on|lk=on}} |fuelcap = |trainheating = None |multipleworking = Not fitted |axleloadclass = [[Route availability]] 1 |railroad =[[British Railways]] |retireddate = 1966–1967 |disposition = One sold to industry, <!-- extant? -->two scrapped |railroadclass = DY1; later D1/1; later 1/15. No TOPS class. }} '''British Rail Class D1/1''' (formerly DY1) was a class of locomotive commissioned by [[British Rail]] in [[England]]. It was a [[diesel locomotive]] in the pre-[[TOPS]] period built by the [[Hunslet Engine Company]] with a {{convert|153|hp}} [[L Gardner and Sons Ltd|Gardner]] 6L3 engine. {{British Rail Locomotives}} {{transport-stub}} [[Category:British Rail diesel locomotives|D1/1]] [[Category:B locomotives]]