Editing SR Class CP

{{Use dmy dates|date=November 2016}}
{{Use British English|date=November 2016}}
{{No footnotes|date=November 2021}}
{{Infobox Train
| background       = #503300;color:lightgoldenrodyellow
| name             = LB&SCR Crystal Palace stock
| image            = 
| imagesize        = 
| caption          = 
| interiorimage    = 
| interiorcaption  = 
| service          = 
| manufacturer     = [[Metro Cammell|Metropolitan Amalgamated Carriage and Wagon Co. Ltd.]], LBSC [[Lancing Carriage Works]]
| factory          = 
| family           = 
| replaced         = 
| yearconstruction = 1911–1913
| yearservice      = 
| refurbishment    = 
| yearscrapped     = 
| numberbuilt      = 34 sets
| numberservice    = 
| numberpreserved  = 
| numberscrapped   = 
| formation        = 3-car sets: {{abbr|DTC|Driving Trailer Composite}}-{{abbr|DMBT|Driving Motor Brake Third}}-DTC
| fleetnumbers     = 
| capacity         = 3-car-set: 48 First, 170 Third
| operator         = 
| depots           = 
| lines            = 
| carbody          = 
| trainlength      =
| carlength        = {{convert|57|ft|7+1/2|in|m|2|abbr=on}}
| width            = {{convert|8|ft|0|in|m|2|abbr=on}}
| height           = 
| floorheight      = 
| platformheight   = 
| entrylevelorstep = 
| art-sections     = 
| doors            = 
| maxspeed         = 
| weight           = DMBT: {{convert|51.30|LT|1}}<br>DTC: {{convert|24|LT|1}}
| acceleration     = 
| deceleration     = 
| traction         = 
| engine           = 
| poweroutput      = {{convert|600|hp|kW|0|abbr=on}}
| traction motors  = Four Winter Eichberg of {{convert|150|hp|kW|0|abbr=on}} each 
| aux              = 
| powersupply      = 
| hvac             = 
| electricsystem   = 6.7 [[Volt|kV]] [[Alternating current|AC]] [[overhead line]]
| collectionmethod = [[Bow collector]]
| uicclass         = 2′2′+B′B′+2′2′
| bogies           = 
| brakes           = 
| safety           = 
| coupling         = 
| multipleworking  = 
| gauge            = {{Track gauge|ussg|allk=on}} 
}}
The [[Southern Railway (UK)|Southern Railway (SR)]] gave the designation '''CP''' to the fleet of AC [[electric multiple unit]]s used on the former [[London, Brighton and South Coast Railway]] lines in the Crystal Palace area.

==Construction==
The '''CP''' ('''C'''rystal '''P'''alace stock) units were built in 1911–1913 to provide the electric train stock required for the [[London, Brighton and South Coast Railway|LBSCR]] AC overhead electrification to Crystal Palace and the surrounding area. This stock comprised some 90 cars, which were used in three-car formations, usually (Driving Trailer [[Travel class#Trains|Composite]]+Driving Motor Brake [[Travel class#Trains|Third]]+Driving Trailer Composite).

Thirty motor coaches and 30 driving trailers were built by the [[Metro Cammell|Metropolitan Amalgamated Carriage and Wagon Co. Ltd.]] in 1911. Each motor coach had four {{convert|150|hp}} [[Repulsion motor|Winter Eichberg motors]]. A further 26 driving trailers were built at the LBSC's [[Lancing Carriage Works]].  In 1912, four additional motor and trailer pairs were delivered by MAC&W's successor, the [[Metropolitan Carriage, Wagon and Finance Company]]. Lancing Works built eight more trailers the following year. 

After the replacement of the AC overhead equipment by the 660 V DC third rail system adopted as standard by the SR, the carriages that formed these units were rebuilt accordingly.

==Formations==
The LB&SCR originally did not buy sufficient stock for 30 sets, on the grounds that the trailers cars would be quicker to overhaul than the motor cars. Fixed formations were not used, and as the Motor cars had cabs, the CP stock could be used in trains of two to six vehicles.
{| class="wikitable"
! Year !! Builder !! Type !! LB&SCR No. !! SR No.
|-
| 1911 || MAC&W || DMBT || 3231–3260 || 8567–8595
|-
| 1911 || MAC&W || DTC || 4001–4030 || 9825–9854
|-
| 1911 || Lancing || DTC || 4031–4056 || 9855–9878
|-
| 1912 || MCW&F || DMBT || 3261–3264 || 8597–8600
|-
| 1911 || MAC&W || DTC || 4061–4064 || 9881–9884
|-
| 1913 || Lancing || DTC || 4069–4076 || 9885–9892
|-
|}


==References==
*{{cite book |last=Gould |first=David |year=1995 |title=Bogie Carriages of the London, Brighton and South Coast Railway |location=Headington, Oxford |publisher=The Oakwood Press |pages=168–190 |isbn=0-85361-470-9}}
*{{Marsden-SouthernEMU1|pages=11, 92}}
*{{cite book |last=Goslin |first=Geoff |year=2002 |title=London's Elevated Electric Railway |publisher=Connor & Butler |isbn=0-947699-35-X}}
*{{cite book |last=Golding |first=Brian |year=2009 |title=A Pictorial Record Of Southern Electric Units |location=Corhampton, Southampton |publisher=Noodle Books |isbn=978-1-906419-34-9}}

{{British Rail EMU}}

[[Category:British Rail electric multiple units|SR CP]]
[[Category:Southern Railway (UK) electric multiple units|CP]]
[[Category:London, Brighton and South Coast Railway]]
[[Category:Train-related introductions in 1911]]

{{electric-loco-stub}}
[[Category:Metropolitan Cammell multiple units]]