What is British Rail Class 74?
{{Infobox Locomotive |name = British Rail Class 74/2 |powertype = Electro-diesel |image = Class 74 74003.jpg |caption = 74 003 in BR blue with full yellow ends |builder = [[British Railways]]’ [[Doncaster Works]]; rebuilt BR [[Crewe Works]] |builddate = 1958–1960; Rebuilt 1967–1968 |gauge = {{RailGauge|ussg|lk=on|abbr=on}} |totalproduction = 10 (rebuilt) |wheeldiameter = {{convert|4|ft|0|in|m|3|abbr=on}} |electricsystem = 650–750 [[Volt|V]] [[Direct Current]] |collectionmethod = Third rail |primemover = [[Paxman (engines)|Paxman]] 6YJXL |generator = |tractionmotors = [[English Electric]] 532A, 4 off |tractiveeffort = ''Electric:'' {{convert|47500|lbf|kN|1|abbr=on|lk=on}}<br>''Diesel:'' {{convert|40000|lbf|kN|1|abbr=on}} |whytetype = Bo-Bo |uicclass = Bo'Bo' |trainbrakes = Vacuum, Air, Electro-Pneumatic |locobrakeforce = |length = |width = |height = |locoweight = {{convert|77|LT|lk=on}} |topspeed = |poweroutput = ''Electric (continuous):'' {{convert|2300|hp|0|abbr=on|lk=on}}<br>''Electric (one-hour):'' {{convert|2552|hp|0|abbr=on}}<br>''Engine:'' {{convert|650|bhp|0|abbr=on}} |fuelcap = |trainheating = [[Electric Train Heating]] |railroad = [[British Railways]]’ Southern Region |roadnumber = E6101–E6110 |axleloadclass = [[Route availability]] 7 |disposition = All scrapped none preserved }} [[British Rail]] '''class 74''' was an [[electro-diesel locomotive]] that operated on the Southern Region of [[British Railways]], rebuilt from redundant [[British Rail Class 71|Class 71]] locomotives in the late 1960s. An electro-diesel locomotive is one that can operate either from an [[Railway electrification system|electrical supply]], such as [[overhead lines]] or an energized [[third rail]], or from an onboard [[diesel engine]]. {{British Rail Locomotives}} {{Transport-stub}} [[Category:British Rail electric locomotives|74]]