What is British Rail Class 01?
{{Infobox Locomotive |name = British Rail Class 01 |powertype = Diesel-mechanical |image = |caption = |roadnumber = 11503–11506, 81 (departmental); later D2953–D2956; later 01001–01002 |builder = [[Andrew Barclay Sons & Co.]] |builddate = 1956 (4), 1958 (1) |serialnumber = 395–398, 424 |gauge = {{RailGauge|ussg|lk=on}} |totalproduction = 5 |primemover = [[L Gardner and Sons Ltd|Gardner]] 6L3 |enginetype = Four-stroke diesel |rpmrange = 1,200 (max) |transmission = Mechanical: Wilson SE4, 4-speed epicyclic gear box, Vulcan-Sinclair type 23 rigid hydraulic coupling, to a Wiseman 15LGB reverse and final drive unit. |whytetype = [[0-4-0]] |uicclass = B |wheeldiameter = {{convert|3|ft|2|in|m|3|abbr=on}} | minimumcurve = {{convert|1.06|chain|m|lk=on}} |trainbrakes = 11503–11506: none<br>18: Vaucuum |locobrakes = Straight Air |locobrakeforce = {{convert|15|LTf|kN|abbr=on|lk=in}} |wheelbase = {{convert|6|ft|0|in|abbr=on}} |length = {{convert|23|ft|8|in|abbr=on}} |width = {{convert|8|ft|5+1/2|in|abbr=on}} |height = {{convert|11|ft|10+1/2|in|abbr=on}} |locoweight = {{convert|25|LT|lk=on}} |topspeed = {{convert|14.5|mph|km/h|1|abbr=on}} |poweroutput = ''Engine:'' {{convert|153|hp|abbr=on}}<br>''At rail:'' {{convert|102|hp|abbr=on}} |tractiveeffort = {{convert|12750|lbf|kN|1|abbr=on|lk=on}} (max) |fuelcap = {{convert|325|impgal|abbr=on|lk=on}} |axleloadclass = [[Route availability|RA 1]] |railroad = [[British Railways]] |retiredate = 1966–1981 }} '''British Rail's Class 01''' [[diesel locomotive]]s were a short [[wheelbase]] [[0-4-0]] diesel-mechanical design intended for use in areas with tight curves and limited clearance. {{British Rail Locomotives}} [[Category:British Rail diesel locomotives|01]] {{Transport-stub}}