Editing British Rail BEMU (section)

{{Short description|Experimental battery electric multiple unit}}
{{Use dmy dates|date=January 2017}}
{{Use British English|date=January 2017}}
{{Infobox train
| background       = #012545;color:white
| name             = British Rail BEMU
| image            = Railcar at Milton of Crathes (geograph 1821382).jpg
| imagealt         = 
| imagesize        = 300px
| caption          = Battery Multiple Unit at Milton of Crathes
| interiorimage    = 
| interiorimagealt = 
| interiorcaption  = 
| service          = 1958–1966
| manufacturer     =
| factory          = Derby Works - converted to battery at [[Cowlairs railway works|Cowlairs]]
| family           = [[British Rail Derby Lightweight|Derby Lightweight]]
| replaced         = Steam locomotives and carriages
| yearconstruction = 1956 - converted 1958
| yearservice      = 
| refurbishment    = 
| yearscrapped     = 
| numberconstruction= 
| numberbuilt      = 1 set (2 cars)
| numberservice    = 
| numberpreserved  = 1 set (2 cars)
| numberscrapped   = 
| formation        = {{abbr|DMBS|Driving Motor Brake Second}}-{{abbr|DTC|Driving Trailer Composite}}
| fleetnumbers     = 
| capacity         = 12 first<br>105 second (initially 31 + 86)
| operator         = [[British Railways]]
| depots           = 
| lines            =

| carbody          = Steel
| trainlength      = 
| carlength        = {{convert|57|ft|6|in|m|2|abbr=on}}
| width            = 
| height           = 
| floorheight      = 
| platformheight   = 
| entrylevelorstep = 
| doors            = 2 on each side
| art-sections     = 
| maxspeed         = {{convert|60|mph}}
| weight           = DMBS: {{long ton|37|10}}<br>DTC: {{long ton|32|10}}
| acceleration     = 
| deceleration     = 
| traction         = 
| engine           = 2 x {{convert|100|kW}} [[Traction motor#Mounting of motors|nose-suspended motors]]
| poweroutput      = 
| transmission     = 
| aux              = 
| powersupply      = [[Chloride Electrical Storage Company|Chloride Batteries Ltd]]
| hvac             = 
| electricsystem   = 216 lead-acid cells, 440 V, 1070 A·hr
| collectionmethod = 
| uicclass         = 
| aarwheels        = 
| bogies           = 
| brakes           = 
| safety           = 
| coupling         = 
| multipleworking  = 
| gauge            = {{RailGauge|ussg}}
}}
The '''British Rail BEMU''' was an experimental two-car [[battery electric multiple unit]] (BEMU), converted from the [[British Rail Derby Lightweight|prototype Derby Lightweight]] [[Diesel multiple unit]]s. The train was powered by many [[lead–acid battery|lead-acid batteries]], and was used on the [[Deeside Railway]] from [[Aberdeen]] to [[Ballater]] in [[Scotland]] from April 1958 until it was finally withdrawn in December 1966. The [[North of Scotland Hydro-Electric Board]] initiated the design and was a joint sponsor. The board promised to supply power at three [[farthing (British coin)|farthings]] per unit for a fixed two-year period.<ref name=mullay>{{cite magazine |last1=Mullay|first1=Alexander|title=Batteries Included |magazine=The Railway Magazine|date=August 2004|pages=56–58}}</ref> It provided an 11kV supply to a charger at Aberdeen's platform 1 and a 6.6kV supply to a charger at Ballater.<ref name=rm>{{cite magazine |magazine=The Railway Magazine |date=June 1958 |pages=419–420 |title=First Battery Railcars on BR |issue=686 |volume=104 }}</ref>