British Rail Class 311

British Rail Class 311
311092 at Glasgow Central in 1984
In service1967–1990[1]
ManufacturerCravens[1]
Order no.
  • 30767 (DTSO)
  • 30768 (MBSO)
  • 30769 (BDTSO)[1]
Built atSheffield
Family nameBR First Generation (Mark 1)
Constructed1966–67[2]
Entered service1967
Number built19
Number preserved1
Number scrapped18
SuccessorClass 320
Formation
  • 3 cars per unit:
  • DTSO-MBSO-BDTSO[2]
Diagram
  • ED211 (MBS)
  • EE214 (DTS)
  • EF212 (BDTS)[3]
Design codeAM11
Fleet numbers
  • 311092–311110 (units)
  • 76403-76421 (DTSO)
  • 62163-62181 (MBSO)
  • 76422-76440 (BDTSO)[1]
Capacity
  • 236 seats (total)
  • 83 seats (DTSO)
  • 70 seats (MBSO)
  • 83 seats (BDTSO)[2][4]
OperatorsBritish Rail
DepotsGlasgow Shields Road[2]
Specifications
Car body constructionSteel[3]
Train length199 ft 6 in (60.81 m)[4]
Car length
  • 63 ft 6+1⁄8 in (19.358 m) (MBSO)
  • 64 ft 0 in (19.498 m) (BDTSO, DTSO)[3]
Width9 ft 3 in (2.819 m)[3]
Height12 ft 8 in (3.861 m)[3]
DoorsDouble sliding leaf, pneumatic
Wheelbase46 ft 6 in (14.173 m)[3]
Maximum speed75 mph (121 km/h)[3]
Weight
  • 129 tonnes (127 long tons; 142 short tons) (total)
  • 34.4 t (33.9 long tons; 37.9 short tons) (DTSO)
  • 56.4 t (55.5 long tons; 62.2 short tons) (MBSO)
  • 38.4 t (37.8 long tons; 42.3 short tons) (BDTSO)[2]
Traction motors4 × AEI 221 hp (165 kW)[2]
Power output890 hp (660 kW)
HVACElectric[3]
Electric system(s)25 kV 50 Hz AC OHLE
Current collector(s)Pantograph
UIC classification2′2′+Bo′Bo′+2′2′
Bogies
  • Gresley ED11 (MBSO)
  • Gresley ET11 (BDTSO, DTSO)[3]
Braking system(s)Air (Auto/EP)[4]
Safety system(s)AWS[3]
Coupling systemBuckeye[4]
Multiple workingWithin class, and Class 303[4]
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge

The British Rail Class 311 alternating current (AC) electric multiple units (EMU) were built by Cravens at Sheffield from 1966 to 1967. They were intended for use on the line from Glasgow Central to Gourock and Wemyss Bay, which was electrified in 1967.

  1. ^ a b c d Longworth 2015, pp. 73, 139, 191–192
  2. ^ a b c d e f Fox 1987, p. 56
  3. ^ a b c d e f g h i j "Vehicle Diagram Book No.210 for Electrical Multiple Units (including A.P.T.)" (PDF). Barrowmore MRG. BRB Residuary Ltd. ED211, EE214, EF212. Archived from the original (PDF) on 3 March 2016. Retrieved 22 February 2016.
  4. ^ a b c d e "Class 311". The Railway Centre. Archived from the original on 7 September 2008. Retrieved 22 February 2016.{{cite web}}: CS1 maint: unfit URL (link)