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British Rail Class 315

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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
  • All units: 2004–2008 (at Bombardier Derby)[1]
  • LO & TfL Rail units: 2015–2016 (at Bombardier Ilford)
Number built61[2]
Number preserved1
Number scrapped53
  • 4 cars per unit:
  • DMSO vehicles: EA207
  • PTSO vehicles: EH217
  • TSO vehicles: EH216
Fleet numbers315801–315861
  • As built: 318 seats
  • Post-2012: 309 seats, plus 7 tip-up
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)
  • Over bogie centres:
  • 14.170 m (46 ft 5.9 in)
Maximum speed75 mph (121 km/h)
  • 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]
Train heatingDucted warm air
Electric system(s)Template:25 kV 50 Hz overhead
Current collection methodPantograph
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
Specifications as at November 1987[5] except where otherwise noted.

British Rail Class 315 alternating current (AC) electric multiple units (EMU) were built by BREL at York works from 1980 to 1981. They were the fifth and final variety of British Rail's then-standard 1972 design suburban EMUs, which eventually encompassed 755 vehicles and five Classes (Class 313/314/315/507/508). Like the Glasgow-based Class 314 units, they are only able to operate from 25 kV overhead line current collection. The fleet works inner-suburban services on the Great Eastern Main Line run by the train operating company TfL Rail out of London Liverpool Street. Class 315s also did work services from Liverpool Street to Chingford, Enfield Town and Cheshunt operated by London Overground but got discontinued in 2020.

References[change | change source]

  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. Cite error: The named reference RailExpressOctober2022 was used but no text was provided for refs named (see the help page).
  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.