DSB class MR

The class MR and class MRD are classes of diesel multiple units (DMUs) built for the Danish State Railways (DSB). Delivered between 1978 and 1985, they have seen use primarily in regional passenger service. A total of 97 trainsets were built, initially by Waggonfabrik Uerdingen and later Scandia.

MR/MRD
DSB MR 4048 north of Aalborg.
Interior (2004).
Manufacturer
Constructed
  • 1978–1985 (MR)
  • 1981–1985 (MRD)
Number built
Formation
  • MR + MR (original)
  • MR + MRD (since 1981)
Operator(s)DSB
Arriva
Specifications
Train length44.670 m (146 ft 6 11⁄16 in)[1]
Car length22.335 m (73 ft 3 5⁄16 in)[1][3]
Wheel diameter760 mm (2 ft 5 15⁄16 in)[4]
Maximum speed
  • 120 km/h (75 mph)
  • 130 km/h (81 mph) (since 1996)[5][3]
Weight34.5 t + 34.5 t[1][3]
Prime mover(s)Deutz F12L 413F[1][3]
Engine typeV-12 diesel
Cylinder count12
Cylinder size120 mm × 130 mm (4.7 in × 5.1 in)[3]
Power output
  • 410 hp (310 kW) (per car, original)
  • 325 hp (242 kW) (per car, without turbo)[3]
Transmissionhydraulic, Voith 320[1][3]
UIC classification2'B' + B'2'
Coupling systemScrew coupling
Track gauge1,435 mm (4 ft 8 1⁄2 in)

The class MR is an adaptation of the German class 628.0[6] and was first delivered in 1978. The trains were initially coupled as MR–MR carriages back-to-back. Starting in 1981, the class MRD was introduced to better accommodate passengers' luggage, and from then on the MR–MRD formation has been used.[7] The trainsets can run in multiple, with up to five carriage pairs in a train having been used.[8]

In 2003, Arriva took over operation of several branch lines in Jutland from DSB, and for this purpose rented 39 MR–MRD trainsets from DSB. 24 of these trains were returned to DSB in 2004–2005, and the remaining 15 in 2010.[9] In addition, 13 MR–MRD trainsets were sold to Arriva in Poland in 2007–08.[10] As of 2016, many of the MR/MRDs have been retired, while two trainsets are preserved by the Danish Railway Museum.[11][2]

Notes
  1. Lauritsen 1997, pp. 49–50.
  2. Poulsen 2016, pp. 157–159.
  3. Poulsen 2016, p. 159.
  4. Poulsen 2016, p. 137.
  5. Poulsen 2016, p. 136.
  6. Poulsen 2016, pp. 104–105.
  7. Poulsen 2016, pp. 111–113.
  8. Poulsen 2016, p. 120.
  9. Poulsen 2016, pp. 125–127.
  10. Poulsen 2016, p. 132.
  11. Poulsen 2016, p. 131.

Bibliography
  • Lauritsen, Tom (1997). Danske lokomotiver og motorvogne 1997 (in Danish). Frank Stenvalls Förlag. ISBN 91-7266-141-0.
  • Poulsen, John (2016). MotorMateriel 4.2: Letbyggede motortog fra Uerdingen/Duewag (in Danish). Bane Bøger. ISBN 97887-91434-45-7.
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