British Rail Class 315

British Rail Class 315
Image showing a Transport for London Rail liveried Class 315 calling at Forest Gate
TfL Rail Class 315 at Forest Gate in September 2015
Image showing the interior of a Class 315, with 2x3 seating, grey and blue (or red) moquettes and blue grab poles.
The refreshed interior of a TfL Rail Class 315
In service1980 – 9 December 2022
ManufacturerBritish Rail Engineering Limited
Built atHolgate Road Works, York
Family nameBREL 1972
Replaced
Constructed1980–1981
Refurbished
  • All units: 2004–2008 (at Bombardier Derby)[1]
  • LO & TfL Rail units: 2015–2016 (at Bombardier Ilford)
Number built61[2]
Number preserved1
Number scrapped53
Successor
Formation
  • 4 cars per unit:
  • DMSO-PTSO-TSO-DMSO
Diagram
  • DMSO vehicles: EA207
  • PTSO vehicles: EH217
  • TSO vehicles: EH216
Fleet numbers315801–315861
Capacity
  • As built: 318 seats
  • Post-2012: 309 seats, plus 7 tip-up
OwnersEversholt Rail Group
Operators
Specifications
Car body constructionSteel underframe with aluminium body and roof
Car length
  • DM vehs.: 19.800 m (64 ft 11.5 in)
  • Trailers: 19.920 m (65 ft 4.3 in)
Width2.820 m (9 ft 3.0 in)
Height3.582 m (11 ft 9.0 in)
Floor height1.156 m (3 ft 9.5 in)
DoorsDouble-leaf pocket sliding, each 1.288 m (4 ft 2.7 in) wide (2 per side per car)
Wheelbase
  • Over bogie centres:
  • 14.170 m (46 ft 5.9 in)
Maximum speed75 mph (121 km/h)
Weight
  • DMSO vehs.: 35.0 t (34.4 long tons; 38.6 short tons)
  • PTSO vehs.: 32.0 t (31.5 long tons; 35.3 short tons)
  • TSO vehs.: 25.5 t (25.1 long tons; 28.1 short tons)
Traction motors
  • 8 total; 4 per DMSO vehicle
  • (Brush TM61-53 or GEC G310AZ, interchangeably)
Power output660 kW (880 hp)
Acceleration0.75 m/s2 (2.5 ft/s2)[3]
HVACDucted warm air
Electric system(s)25 kV 50 Hz AC overhead
Current collector(s)Pantograph
UIC classificationBo′Bo′+2′2′+2′2′+Bo′Bo′
BogiesBREL BX1
Minimum turning radius70.4 m (231 ft 0 in)
Braking system(s)Electro-pneumatic (disc)
Safety system(s)
Coupling systemTightlock[4]
Multiple workingWithin class
Track gauge1,435 mm (4 ft 8+12 in) standard gauge
Notes/references
Specifications as at November 1987[5] except where otherwise noted.

The British Rail Class 315 is a fleet of alternating current (AC) electric multiple unit (EMU) trains, built by British Rail Engineering Limited at Holgate Road Carriage Works in York between 1980 and 1981; they replaced the Class 306 units. It was a variant of unit derived from British Rail's 1971 prototype suburban EMU design which, as the BREL 1972 family, eventually encompassed 755 vehicles across Classes 313, 314, 315, 507 and 508.[6] Revenue services with Class 315 units commenced in 1980 and continued until December 2022.[2][7]

  1. ^ "News Desk" (PDF). The Railway Herald. No. 125. Northallerton. 21 March 2008. p. 4. ISSN 1751-8091. Archived from the original (PDF) on 9 October 2011. Retrieved 15 July 2011.
  2. ^ a b "PEP-talk: the BR second generation EMU". Rail Express. No. 317. Horncastle: Mortons Media Group. October 2022. pp. 54–55.
  3. ^ "Class 315". London: Eversholt Rail. Archived from the original on 3 February 2020. Retrieved 3 February 2020.
  4. ^ System Data for Mechanical and Electrical Coupling of Rail Vehicles in support of GM/RT2190 (PDF). London: Rail Safety and Standards Board. 22 June 2011. p. 4. SD001. Archived from the original (PDF) on 1 April 2012. Retrieved 22 November 2022.
  5. ^ "Vehicle Diagram Book No. 210 for Electrical Multiple Units (including A.P.T.)" (PDF). Barrowmore MRG. BRB Residuary Ltd. EA207 & EH216–EH217 (in work pp. 16–17 & 286–289). Archived from the original (PDF) on 21 January 2015. Retrieved 21 January 2015.
  6. ^ "The twilight zone". Railways Illustrated. No. 249. November 2023. pp. 50–53.
  7. ^ "Class 315 farewell set saved". The Railway Magazine. No. 1462. January 2023. p. 73.

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