class class class british railway diesel electric locomotive developed 1960s total class built brush numerous class british mainline diesel locomotive fitted twin bank cylinder unit producing later improve reliability passenger freight trains britain railways years despite introduction modern types traction significant number use mainline heritage railways july locomotives exist class examples having converted classes approximately retain operational status mainline origins class history begins early 1960s stated aim completely remove steam locomotives target date required large build lightweight type locomotives achieve aim required locomotives producing axle load long tons convinced future diesel traction lay hydraulic transmission path began looking diesel electric designs despite construction demonstration locomotives lion produced engine falcon built engines need large number locomotives quickly deemed paramount pilot build class began prototypes assessed initial build locomotives nos different remainder type withdrawn earlier based success lion order locomotives later revised upwards number times reach final total locomotives nos fitted power unit classified class experiment deemed success later converted standard service eventually locomotives constructed brush remaining locomotives numbered remaining numbered locomotives went work passenger freight duties regions large numbers went replace steam locomotives especially express passenger duties locomotives bar batch built freight duties fitted steam heating boilers train heat duties initial batch plus fitted electric train heating type heating standard large number locomotives later fitted equipment mid 1960s decided rate engine output fleet significantly improved reliability reducing stresses power plant whilst causing noticeable reduction performance sub classes early 1970s fleet renumbered series conform tops systems enabled number easily sub classes created depending differing equipment fitted original series based train heating capability follows class locomotives steam heating equipment class locomotives train heating class locomotives dual electric train heating numbering system later disrupted locomotives fitted extra equipment renumbered sub classes overview renumbering class renumbering page section main sub classes created class originally numbered locomotives basic class steam heating equipment fitted 1970s 1980s steam heating trains gradually phased locomotives fitted equipment gradually steam heating boilers removed fitted whilst remained train heating capability mainly freight work 1990s class designation applied class class fitted multiple working equipment locomotives involved vacuum braking systems removed isolated leaving air mainly paper exercise locomotives renumbered article included class class originally numbered sub class originally built train heating equipment remained freight locomotives exclusively working lives fitted slow speed control working coal trains number class summer months train heat required regularly found hauling extra trains holiday season brought sub type remained stable started extra created train heating equipment removed renumbered direct replacement collision damaged renumbered use test trains class designation standard locomotives fitted passenger mail parcels use locomotives fitted time renumbering occurred shortly sub class settled locomotives numbered later class converted class renumbered series onwards eventually reached class class severely damaged near locomotive selected projected class fitted cylinder engine rated assessment purposes identify unique renumbered time number range class extended far later class project fitted cylinder engine time renumbered continued non standard engine fitted withdrawal class late 1970s authorities identified need replace trains operating glasgow edinburgh shuttle services order increase speed reliability trains operated pairs class end train decided convert operate service push pull mode locomotives known class fitted push pull equipment long range fuel tanks maintained operate mph conversions began service operated completely push pull service spread services locomotives converted sub class comprised nos locomotive converted fire damaged withdrawn class 1990s converted long range fuel tanks equipment allow work type rolling stock known control vehicles utilised cables allow driver signal driver locomotive apply power operate brakes locomotives equipped push pull equipment numbered series onwards passenger work number fitted extra fuel tanks renumbered series locomotives prince henry dedicated use designated class class original conversions fitted extra fuel tanks giving extended range earlier class converted decided locomotives easy locomotives renumbered series time locomotives fitted extra fuel tanks renumbered series eventually reached locomotives number range mainly cross country work introduction voyager trains duties kept maintained condition allowing remain operational longer majority classmates consequence received relatively recent locomotives number range officially class tops system decline original locomotives withdrawn service accident damage work class declining introduction new rolling stock spare parts difficult source started locomotives targeted non standard pilot batch numbered locomotives withdrawn life expired february remainder batch recently overhauled followed years withdrawn drew hit list locomotives early withdrawal mainly including non standard electrical equipment known series parallel locomotives outset slow mainly surplus spare parts new flows freight traffic required extra locomotives locomotives withdrawn end introduction new locomotives rate withdrawal quickly rose reaching end lives years non standard locomotives withdrawn reduction fleet proceeded slowly produced new independent rail companies needing available traction order new locomotives average locomotives year taken service decline passenger work number locomotives painted celebrity colours depicting type carried history continued tradition painting unusual dates depot painted locomotives huge celebrate silver jubilee queen elizabeth_ii current mainline operation october years line passenger freight operations locomotives retain operational status national network following list companies currently operating class locomotives appear freight stock movements charter trains spot hire duties locomotives currently operational currently sale primarily charter train operator expanded fleet withdrawn locomotives locomotives currently operational company based fleet locomotives mainly haul charter trains hired use maintained locomotives currently operational owns small fleet locomotives duties hauling track maintenance trains occasional steel traffic locomotives currently operational freight company operate named november mark years container train ran ceremony held secretary attendance number locomotives stored condition operators preserved locomotives maintained mainline standards locomotive appear network time approximately locomotives owned companies remain non operational stored condition stored use awaiting scrapping rest return main line working locomotives class proved popular private railways currently preservation majority working order list found list preserved class locomotives thirty locomotives rebuilt engines classified class took today owned including prototype passenger class accidents incidents january severely damaged freight train hauling ran control near eventually signal box withdrawn months later class withdrawn working life months december near whilst hauling train coaches shortly freight train collided heavily wreckage killing drivers locomotives withdrawn months later salvaged transferred april badly damaged hauling freight train struck head passenger train passed signal danger caught fire accident class withdrawn march wrecked power unit exploded locomotive hauling liverpool street express june involved rail crash people killed locomotive repaired later life numbered withdrawn class rebuilding programme damage discovered thought dated accident march collided fallen bridge line near drivers train killed september hauling mail train head collision diesel multiple unit leeds signalling fault people killed injured october fifth class withdrawn suffering severe damage fatal accident scotland hauling glasgow service collided local train stopped december involved accident lincolnshire whilst hauling oil train locomotive collided local train resulting death passenger later emerged locomotive renumbering allegedly warning given claimed accident involving locomotive numbered july express rear train collided cow near resulting deaths accident raised concerns safety push pull operation locomotive rear train december fire locomotive hauling freight train petrol caught fire lancashire west yorkshire border march locomotive light engines hit head passenger train error person killed lack training power cut factors february amazon hauling freight train ran away trap points train ran wreckage march hauling freight train overran signals head collision passenger train hauled somerset people seriously injured gallery cuba locomotives similar class supplied
British Rail Class 47