# SR Class CW

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LB&SCR Coulsdon North & Sutton stock In service 1925–1929 Manufacturer Metropolitan Carriage, Wagon and Finance Company Constructed 1923–1924 Number built 101 vehicles Formation 5-car sets: DTT-DTC-MLV-TC-DTT Operator Southern Railway Specifications Car length MLV: 42 ft 1 in (12.83 m) Weight MLV: 62 long tons (63 t; 69 short tons) Power output 1,000 hp (750 kW) Transmission Four GEC traction motors of 250 hp (186 kW) Electric system 6.7 kV AC overhead lines Current collection Bow collector Track gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge

The [Southern Railway (SR)](/source/Southern_Railway_(UK)) gave the designation **CW** to the fleet of AC [electric multiple units](/source/Electric_multiple_unit) used on the lines to [Coulsdon](/source/Coulsdon) and [Wallington](/source/Wallington%2C_London). They were planned by the [London, Brighton and South Coast Railway](/source/London%2C_Brighton_and_South_Coast_Railway), but were delayed by [World War I](/source/World_War_I) and the [grouping](/source/Railways_Act_1921) and were introduced by the Southern Railway.

## Construction

The **CW** (**C**oulsdon and **W**allington stock) units were built in 1923–1924, as the last electric train stock for use on the [LBSCR](/source/London%2C_Brighton_and_South_Coast_Railway) AC overhead electrified lines in South London. This stock comprised some hundred carriages, which were used in five-car formations: Driving Trailer [Third](/source/Travel_class#Trains) (DTT) + Driving Trailer [Composite](/source/Travel_class#Trains) (DTC) + Motor Luggage Van (MLV) + Trailer Composite (TC) + Driving Trailer Third (DTT).

The stock, built by the [Metropolitan Carriage, Wagon and Finance Company](/source/Metropolitan_Carriage%2C_Wagon_and_Finance_Company) at [Birmingham](/source/Birmingham), was as follows:

- 21 Motor Luggage Vans

- 60 Driving Trailers

- 20 Trailers

The Motor Luggage Vans (nicknamed "Milk Vans") each had four 250 horsepower (190 kW) [GEC](/source/General_Electric_Company_plc) traction motors.

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, the Motor Luggage Vans becoming bogie goods train [brake vans](/source/Brake_van).

## References

- Gould, David (1995). *Bogie Carriages of the London, Brighton and South Coast Railway*. Headington, Oxford: [The Oakwood Press](/source/The_Oakwood_Press). pp. 168–190. [ISBN](/source/ISBN_(identifier)) [0-85361-470-9](https://en.wikipedia.org/wiki/Special:BookSources/0-85361-470-9).

- Marsden, Colin J. (1983). *Southern Electric Multiple-Units 1898–1948*. Shepperton, Surrey: Ian Allan Limited. pp. 11–13, 92. [ISBN](/source/ISBN_(identifier)) [0-7110-1253-9](https://en.wikipedia.org/wiki/Special:BookSources/0-7110-1253-9).

- Golding, Brian (2009). *A Pictorial Record Of Southern Electric Units*. Corhampton, Southampton: [Noodle Books](https://en.wikipedia.org/w/index.php?title=Noodle_Books&action=edit&redlink=1). [ISBN](/source/ISBN_(identifier)) [978-1-906419-34-9](https://en.wikipedia.org/wiki/Special:BookSources/978-1-906419-34-9).

v t e Electric multiple units of Great Britain AC units (300–399) 300 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 (I) 316 (II) 316 (III) 317 318 319 320 321 322 323 325 331 (I)1 331 (II) 332 333 334 341 342 345 350 (I)2 350 (II) 357 360 365 370 371 373 374 375 376 377 378 379 380 381 382 385 387 390 395 397 AC units DC units (700–899) 700 701 7053 707 710 711 (I)3 711 (II)4 717 720 730 745 7555 7565 7685 7695 777 7805 7995 8005 801 8025 803 (I)6 803 (II) 8047 8055 807 8105 895 8975 AC units (pre-TOPS) AM1 AM2 AM3 AM4 AM5 AM6 AM7 AM8 AM9 AM10 AM11 LB&SCR CP LB&SCR CW LB&SCR SL MR Lancaster units DC units (400–599) 401 402 403 404 405 410 411 412 413 414 415 416 418 419 420 421 422 423 424 427 430 431 432 438 442 444 445 446 447 450 455 456 457 458 460 465 466 471 480 482 (I) 482 (II) 483 484 485 486 487 488 489 499 (I) 501 502 503 504 505 506 507 508 510 DC units (pre-TOPS) LMS electric units LNER Tyneside units LNWR electric units LOR electric units LYR electric units Mersey Railway electric units MSJ&AR electric units NER electric units W&CR electric units Battery units BEMU 2305 781 Hydrogen units 600 614 Miscellaneous units 398 399 499 (II) 555 599 Families 1959 design 1972 design Mark 2-derived Mark 3-derived A-Train APT Aventra Citylink Civity D-Train Desiro Electrostar FLIRT Coradia Juniper METRO Networker TGV Tube8 Velaro Notes 1: Renumbered as Class 332 2: Renumbered as Class 325 3: Renumbered as Class 701 4: Renumbered as Class 720/6 5: Bi- or tri-mode unit 6: Renumbered as Class 802/2 7: Renumbered as Class 810 8: Grouping of different rolling stock types built to loading gauge of London Underground deep tube lines British electric multiple units List of locomotives List of diesel multiple units List of electric multiple units List of departmental multiple units Rolling stock of Network SouthEast

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Adapted from the Wikipedia article [SR Class CW](https://en.wikipedia.org/wiki/SR_Class_CW) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/SR_Class_CW?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.