British Rail Class 107

From Wikipedia, the free encyclopedia
Jump to: navigation, search
British Rail Class 107
(Derby short heavyweight)
Class 107 in Largs (April 1984).jpg
Units 107 427 and 107 444 at Largs in April 1984
In service 1960–1991
Manufacturer BR Derby Works
Constructed 1960
Number built 26 sets (78 cars)
Formation 3-car sets: DMBS-TSL-DMCL
Capacity DMBS: 52 second-class
TSL:71 second-class
DMCL: 12 first-class, 53 second-class
Operator(s) British Rail
Car length 58 ft 1 in (17.70 m)
Width 9 ft 3 in (2.82 m)
Height 12 ft 4 in (3.76 m)
Maximum speed 70 mph (113 km/h)
Weight DMBS: 35.0 tonnes (34.4 long tons; 38.6 short tons)
TCL: 28.5 tonnes (28.0 long tons; 31.4 short tons)
DMCL: 35.5 tonnes (34.9 long tons; 39.1 short tons)
Prime mover(s) Two BUT 6-cylinder diesels per power car
Power output 600 bhp (447 kW) per set,
300 bhp (224 kW) per power car,
150 bhp (112 kW) per engine
Transmission Mechanical: 4-speed epicyclic gearbox
Safety system(s) AWS
Coupling system Screw-link, British Standard gangways
Multiple working Blue Square
Track gauge 1,435 mm (4 ft 8 12 in)

The British Rail Class 107 diesel multiple units were built by the Derby Works of British Railways and were introduced in 1960. The class looked similar to the later Class 108 units, but were heavier - having been built out of steel.


The Class 107s were used in the Scottish Region, where the Class remained for its service life. When new, a number were used on Dundee/Arbroath services. In later years, they were used almost exclusively on services radiating from Glasgow Central to such destinations as Barrhead, East Kilbride, and Kilmacolm, and - prior to electrification - on Glasgow/Ayrshire services (especially Largs). Most were withdrawn from service by 1991.

Many of the units went into departmental use after being withdrawn from passenger use. The class suffered from a structural problem, however, which could result in the bodies separating from the chassis under heavy braking.


Lot No. Car Type Qty Fleet number Notes
30611 Driving Motor Brake Second (DMBS) 26 51985–52010
30612 Driving Motor Composite with lavatory (DMCL) 26 52011–52036
30613 Trailer Second with lavatory (TSL) 26 59782–59807

Originally, there were no fixed set formations, but eventually, sets were numbered as 107425-449 in DMBS order (the DMCLs & TSLs were formed into the sets at random). Renumbered to 107725-749 in 1988 to avoid confusion of set numbers with new 156 units which also had 4xx numbers. Renumbered again to 107025-049 about 1990 to avoid similar confusion with new class 158s numbered in 7xx series.

Other technical details[edit]

  • Coupling Code: Blue Square
  • Transmission: Standard mechanical

For coupling codes see British United Traction


Several examples of the class have entered preservation.

Set number Vehicle numbers Livery Location Notes
- 51990 - - Strathclyde Strathspey Railway Donor of spare parts
- 51993 - 52012 BR Green Tanat Valley Light Railway Under Restoration
- 52005 - 52031 BR Green Tanat Valley Light Railway Operational
- 52006 - 52025 BR Green Avon Valley Railway[1] Operational
- 52008 - 52030 BR Green Strathspey Railway Under Restoration
- - - 52029 Strathclyde Gloucestershire Warwickshire Railway Purchased 2015 to be restored[2]
- - 59791 - BR Green Tanat Valley Light Railway Static Display




  • Motive Power Recognition: 3 DMUs. Colin J. Marsden
  • British Railway Pictorial: First Generation DMUs. Kevin Robertson
  • British Rail Fleet Survey 8: Diesel Multiple Units- The First Generation. Brian Haresnape
  • A Pictorial Record of British Railways Diesel Multiple Units. Brian Golding

External links[edit]