British Rail Mark 3 - Multiple Units Based On The Mark 3

Multiple Units Based On The Mark 3

The Mark 3 formed the basis of BR's Second Generation multiple unit fleet, which was progressively phased in from the early 1980s onward.

Electric multiple units include the 25 kV AC EMUs of the Class 317 and Class 318, and the 750 V DC EMUs of the Class 455 and Class 442. Also with a dual voltage EMU which is the Class319. Diesel multiple units include the short-lived diesel electric Class 210, and the diesel mechanical "Sprinters" of the Class 150. The cars for Classes 150, 210, 317, 318 and 455 units are built on 20 m frames, and are outwardly similar. However, those for Class 442 are on 23 m frames, and visually look very similar to the familiar HST mark 3 coach. The main visual difference being the use of swing plug automatic doors rather than the traditional "slam-door" as used on HST stock. The Class 153 and Class 155, while being of the "Sprinter family", are in fact built by British Leyland and have nothing to do with the Mk 3 carriage. This is also true of the Class 156, which was built by Metro-Cammell. The final batch of "Sprinters" of Class 158 (some rebuilt as Class 159), are of a design intermediate between that of the Mk 3 and the later Mk 4. In addition, a fleet of nine 450 Class DMUs were built at Derby for Northern Ireland Railways using Mark 3 bodyshells and Mark 1 underframes, together with refurbished power units and traction motors, recovered from the former UTA 70 class units. The last EMUs built that are based on the Mark 3 carriage are the Class 321 and 322 units.

BREL Mark 3-derived family
Diesel
  • Class 150
  • Class 154
  • Class 210
  • Class 450 (NIR)
Electric
  • Class 317
  • Class 318
  • Class 319
  • Class 320
  • Class 321
  • Class 322
  • Class 325
  • Class 442
  • Class 455
  • Class 456

Read more about this topic:  British Rail Mark 3

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