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| British Rail Class 47 | |
|---|---|
| Name | Class 47 |
| Powertype | Diesel-electric |
| Builder | Brush Traction; Crewe Works |
| Builddate | 1962–1968 |
| Totalproduction | 512 |
| Britishclass | Co-Co |
| Primemover | Sulzer 12LDA28C |
| Topspeed | 95–110 mph |
British Rail Class 47.
The Class 47 was a mainline diesel-electric locomotive built for British Rail during the early 1960s by Brush Traction and Crewe Works as part of the modernisation programme that followed the Beeching cuts and the electrification efforts overseen by the British Transport Commission, aiming to replace steam locomotives on routes serving London Euston, Liverpool Lime Street, Edinburgh Waverley and other principal termini; notable operators and owners included British Rail, EWS, Direct Rail Services, and numerous heritage railway societies such as the Severn Valley Railway and North Yorkshire Moors Railway.
Designed during the era of the British Railways Board and influenced by the work of engineers at Brush Traction and Sulzer, the Class 47 programme drew on lessons from earlier classes such as the Class 37 and Class 40. The design process involved collaboration with British Rail Research Division, consultation with regional workshops at Doncaster Works and Crewe Works, and considerations of route availability across lines including the West Coast Main Line and the East Coast Main Line. Early prototypes and pre-production testing occurred on test circuits used by British Railways (BR) and at proving grounds associated with Railtrack predecessor organisations.
The Class 47 was powered by a Sulzer 12LDA28C V12 diesel engine driving DC traction motors via a Brush Traction generator, with a Co-Co wheel arrangement manufactured to meet axle load restrictions on the West Highland Line and other secondary routes. Electrical equipment included components supplied by AEI and British Thomson-Houston, while braking systems incorporated Vacuum brake and later Air brake equipment for compatibility with rolling stock used on services between Paddington station, Glasgow Central, and Birmingham New Street. Performance figures varied by modification: top speeds between 95 mph and 110 mph, tractive effort and power output adjusted through re-gearing and prime mover upgrades for duties on expresses such as those serving Holyhead ferries or freight flows to Felixstowe.
Introduced into service in the 1960s, Class 47s operated on express passenger services between London King's Cross, Manchester Piccadilly, Cardiff Central and Aberdeen, as well as freight workings including intermodal traffic to Tilbury Docks and aggregate runs to Dagenham Dock. The fleet underwent sectorisation under InterCity, Regional Railways, and Network SouthEast, later passing into private hands during the Railway privatisation in Great Britain era with firms such as Virgin Trains, FirstGroup, and Arriva operating examples. Notable named workings included services like the Caledonian Sleeper predecessors and charter trains organised by societies such as the Railway Touring Company and Railway Correspondence and Travel Society.
Over time the Class 47 family spawned multiple sub-classes and conversions: re-engined and re-geared units became distinct across allocations at depots including Bradford and Glasgow Shields Road; some were modified into Class 57 conversions by companies such as Brush Traction and Cooper-Bessemer contractors, while other examples were fitted with electric train heating for use on InterCity services or modified for push–pull operation on suburban routes serving Southampton and Penzance. Experimental conversions and departmental adaptations served infrastructure duties for organisations like Network Rail predecessor bodies and were allocated for test trains linked to signalling trials at Crewe and the Old Dalby Test Track.
Throughout their careers Class 47s carried liveries ranging from BR Blue and BR Green to Railfreight sectors, bespoke promotional schemes for operators including Virgin Trains and freight liveries for EWS and DB Schenker (UK); preserved examples now wear authentic or commemorative liveries at heritage centres including the National Railway Museum, Great Central Railway (heritage railway), and the North Norfolk Railway. Preservation groups such as the Mid-Norfolk Railway Preservation Trust and private owners maintain several locomotives, offering mainline-certified examples for railtours run by organisations like Victa Westlink Rail and charities collaborating with Railway Benefit Fund events.
Class 47 locomotives were involved in a number of notable accidents and incidents across the network, including derailments and collisions investigated by bodies such as the Rail Accident Investigation Branch and its predecessors; notable locations for incidents included stretches of the Settle and Carlisle Line and junctions near Doncaster and Bristol Temple Meads. Each major incident prompted safety reviews by organisations including British Transport Commission successors and contributed to operational changes endorsed by regulators overseeing the Health and Safety Executive in relation to rail operations.
Category:British Rail diesel locomotives 1962–1968 Category:Co-Co locomotives