British Rail Class 303

class of 91 British 3-car electric multiple units

The British Rail Class 303 is a type of electric multiple unit. They are also known as "Blue Train" units. They were introduced in 1960 for the electrification of the North Clyde and the Cathcart Circle lines in Strathclyde. At first they were classified as AM3 units before the introduction of the TOPS classification system. They were the dominant EMU on the Glasgow suburban railway network for over 25 years. The final units were withdrawn from service in 2002.

British Rail Class 303
Class 303 at Milngavie in 1983
In service5 November 1960–30 December 2002
ManufacturerPressed Steel Company
Order no.
  • 30579 (DTSO, 75566-75600)
  • 30629 (DTSO, 75747-75801)
  • 30580 (MBSO, 61481-61515)
  • 30630 (MBSO, 61812-61867)
  • 30581 (BDTSO, 75601-75635)
  • 30631 (BDTSO, 75802-75857)[1]
Built atLinwood, Renfrewshire
Family nameBR First Generation Mark 1
ReplacedVarious steam engines/early carriages
Constructed1959–1961[1]
Entered service1960–1961
Refurbishment1984[2] - c.1990
Scrapped1974–2003[2]
Number built91
Number preserved1[2]
Number scrapped90[2]
Successor
Formation
  • 3 cars per unit:
  • DTS+MBS+BDTS (as built)[3]
  • DTSO+MBSO+BDTSO (rebuilt)[3]
Diagram
  • EE206 (DTSO, 303/0)
  • ED201 (MBSO, 303/0)
  • EF202 (BDTSO, 303/0)
  • EE241 (DTSO, 303/1)
  • ED220 (MBSO, 303/1)
  • EF217 (BDTSO, 303/1)[1][4]
Design codeAM3
Fleet numbers
  • 303001–303091 (full sets)
  • 75566-75600, 75746-75801 (DTSO)
  • 61481-61515, 61812-61867 (MBSO)
  • 75601-75635, 75802-75857 (BDTSO)[1]
Capacity
  • 236 seats (as built)
  • 160 seats (rebuilt)[3]
Operator(s)
Depot(s)
Line(s) served
Specifications
Car body constructionSteel[4]
Train length199 ft 6 in (60.81 m)[3]
Car length
  • 63 ft 11.5 in (19.49 m) (DTS, BDTS)
  • 63 ft 2.25 in (19.26 m) (MBS)[3]
Width9 ft 3 in (2.82 m)[3]
Height12 ft 8 in (3.86 m)[3]
Floor height3 ft 7.5 in (1.1 m)[4]
DoorsTwin leaf sliding, pneumatically operated
Articulated sections3
Wheelbase46 ft 6 in (14.17 m) (bogie centres, per car)[4]
Maximum speed75 mph (121 km/h)[1]
Weight
  • 124 long tons (126 t; 139 short tons) (set)
  • 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)[1]
Traction motors4 × MV 155kW[1][3]
Power output618 kW (829 hp)[3]
Train heatingElectric
Electric system(s)25 kV AC & 6.25 kV AC overhead[4]
Current collection methodPantograph
UIC classification2′2′+Bo′Bo′+2′2′
Bogies
  • Gresley ET3 (DTS, BDTS)[1][4]
  • Gresley ED3 (MBS)[4]
Braking system(s)Electropneumatic[4]
Safety system(s)AWS[4]
Coupling system
Multiple workingWithin class, and Class 311[3]
Track gauge1,435 mm (4 ft 8 12 in) standard gauge

References

change
  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Fox 1994, pp. 7–8
  2. 2.0 2.1 2.2 2.3 "Class 303 History". Scottish Trains Website. Archived from the original on 25 October 2015. Retrieved 2 February 2016.
  3. 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 "Class 303". The Railway Centre. Archived from the original on 25 July 2008. Retrieved 2 February 2016.{{cite web}}: CS1 maint: unfit URL (link)
  4. 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 "Vehicle Diagram Book No.210 for Electrical Multiple Units (including A.P.T.)" (PDF). Barrowmore MRG. BRB Residuary Ltd. ED201, ED220, EE206, EE241, EF202, EF217. Archived from the original (PDF) on 3 March 2016. Retrieved 2 February 2016.
  5. Servicing depot opened in 1987
  6. Fox 1987, p. 50.
  7. Following closure as a passenger station in 1979, Bridgeton Central became a major servicing depot for Cl.303s until 1987