British Rail Class 142

British Rail Class 142
Pacer
Arriva Trains Wales Class 142 interior in 2013
In service1985–2020
Manufacturer
Order no.
  • 31003 (DMS vehs. 55542–55591)[2]
  • 31004 (DMSL vehs. 55592–55641)
  • 31013 (DMS vehs. 55701–55746)
  • 31014 (DMSL vehs. 55747–55792)
Built atDerby Litchurch Lane Works
Family namePacer
Constructed1985–1987
Refurbished
  • 1997–2003
  • 2008–2017
Number built96
Number preserved35
Number scrapped60
Formation2 vehicles per unit: DMS-DMSL[1]
Diagram
  • DMS vehicles: DP234
  • DMSL vehicles: DP235[2]
Fleet numbers142001–142096[3]
Capacity102[4] to 121 seats[1]
Specifications
Car body constructionSteel[1]
Car length15.123 m (49 ft 7.4 in)[1]
Width2.800 m (9 ft 2.2 in)[1]
Height3.863 m (12 ft 8.1 in)[1]
DoorsDouble-leaf folding (three per side)
Wheelbase9.000 m (29 ft 6.3 in)[1]
Maximum speed75 mph (121 km/h)[1]
Weight
  • As built;[1]
  • DMS vehs.: approx. 21.0 tonnes (20.7 long tons; 23.1 short tons)
  • DMSL vehs.: approx. 21.5 tonnes (21.2 long tons; 23.7 short tons)
  • After upgrade;[5]
  • DMS vehs.: 24.5 tonnes (24.1 long tons; 27.0 short tons)
  • DMSL vehs.: 25.0 tonnes (24.6 long tons; 27.6 short tons)
Prime mover(s)
Engine typeInline-6 4-stroke turbo-diesel[7][8]
Displacement
  • Leyland: 11.1 L (680 cu in)[7]
  • Cummins: 10.0 L (610 cu in)[8]
  • (per engine)
Power output
  • Leyland: 149 kW (200 hp)[9]
  • Cummins: 168 kW (225 hp)[6]
  • (per engine)
Transmission
UIC classification1-A + A-1[10]
Minimum turning radius70 m (230 ft)[1]
Braking system(s)Electro-pneumatic (tread)[5]
('Westcode')
Safety system(s)
Coupling systemBSI[5]
Multiple workingWithin class, and with Classes 14x, 15x, and 170[5]
Track gauge1,435 mm (4 ft 8+12 in) standard gauge

The British Rail Class 142 Pacer are diesel multiple unit passenger trains built for British Rail (BR) from 1985 to 1987. They were built with a high level of commonality with the widely used Leyland National bus. They are part of the Pacer family of railbuses. The last set was withdrawn from service in 2020.

  1. ^ a b c d e f g h i j k l m Vehicle Diagram Book No. 220 for Diesel Multiple Unit Trains (Railcars) (PDF). Derby: Mechanical & Electrical Engineering Department, British Railways Board. March 1987. DP234, DP235 (in work pp. 63–66). Archived from the original (PDF) on 21 January 2015 – via Barrowmore MRG.
  2. ^ a b Fox, Peter; Hughes, Barry (1994). British Railways Pocket Book No. 3: DMUs & Channel Tunnel Stock (7th ed.). Sheffield: Platform 5 Publishing. pp. 15–16, 25. ISBN 9781872524597.
  3. ^ "Class 142". The Railway Centre. Archived from the original on 9 March 2005. Retrieved 1 February 2016.{{cite web}}: CS1 maint: unfit URL (link)
  4. ^ "Passenger Focus response to Network Rail's North West Route Utilisation Strategy". Transport Focus. 11 January 2007. Archived from the original on 13 December 2020. Retrieved 1 December 2020.
  5. ^ a b c d e "Regional Passenger Trains: Class 142". London: Angel Trains. Archived from the original on 18 May 2018. Retrieved 22 December 2022.
  6. ^ a b Pritchard, R.N.; Fox, Peter (2009). British Railways Pocket Book No. 3: Diesel Multiple Units 2010. Sheffield: Platform 5 Publishing. p. 15. ISBN 978-1-902336-75-6. OCLC 614300319.
  7. ^ a b Leyland Titan Technical Data (PDF). Southall: British Leyland UK. June 1978. Lit. No. 1683. Archived (PDF) from the original on 31 January 2022. Retrieved 21 December 2022.
  8. ^ a b Engine Performance Curve LTA10-G2. Columbus, Indiana: Cummins Engine Company. 14 April 1997. FR-2254. Archived from the original (PDF) on 22 December 2022. Retrieved 22 December 2022.
  9. ^ a b Cite error: The named reference shore was invoked but never defined (see the help page).
  10. ^ Pritchard, Robert; Hall, Peter (14 February 2018). British Railways Locomotives & Coaching Stock 2018. Sheffield, England: Platform 5. p. 199. ISBN 978-1-909431-44-7.