Class 140 (right) at Landore TMD, Swansea, in 1982
In service
1981 – c. 1986
Manufacturer
British Rail Engineering Limited
Leyland Vehicles Limited[1]
Order no.
30962[2]
Built at
Derby Litchurch Lane Works[2]
Family name
Pacer
Constructed
1979–1981[3]
Number built
1
Number preserved
1
Formation
2 vehicles: DMSL-DMS
Diagram
DMSL vehicle: DP222
DMS vehicle: DP223[1]
Fleet numbers
Unit: 140001
Vehicles: 55500 and 55501[2]
Capacity
102 seats[2]
Operators
British Rail
Depots
Neville Hill (Leeds)[2]
Specifications
Car body construction
Steel[1]
Car length
15.878 m (52 ft 1.1 in)[1]
Width
Over body: 2.468 m (8 ft 1.2 in)
Over treadplates: 2.744 m (9 ft 0 in)[1]
Height
3.906 m (12 ft 9.8 in)[1]
Floor height
1.215 m (3 ft 11.8 in)[1]
Doors
3 per side
Wheel diameter
840 mm (2 ft 9 in)[1]
Wheelbase
9.000 m (29 ft 6.3 in)[1]
Maximum speed
75 mph (121 km/h)
Weight
DMSL vehicle: 23.2 t (22.8 long tons; 25.6 short tons)
DMS vehicle: 23.0 t (22.6 long tons; 25.4 short tons)[2]
Prime mover(s)
2 × Leyland TL11 (one per vehicle)[1]
Engine type
Inline-6 4-stroke turbo-diesel[4]
Displacement
11.1 L (680 cu in) per engine[4]
Power output
153 kW (205 hp) per engine[2]
Transmission
SCG R.500 (4-sp. epicyclic)[5]
Minimum turning radius
70 m (230 ft)[1]
Braking system(s)
Electro-pneumatic (tread) ('Westcode')
Safety system(s)
AWS
Coupling system
Tightlock[1]
Multiple working
Not fitted[1]
Track gauge
1,435 mm (4 ft 8+1⁄2 in) standard gauge
The British Rail Class 140 was the prototype of the Pacer diesel multiple unit.
It was constructed between 1979 and 1981 in response to a desire within British Rail to develop a capable railbus for its smaller branch line services. Much of the bodywork was constructed using Leyland National bus components, with the exception of the cabs. Based on the single car railbus prototypes, the Class 140 was built to BR's then stringent regulations regarding crashworthiness and resistance to end loading; as such, much of its intention lightweight 'bus on a wagon' look was lost, becoming a more substantial vehicle. Throughout the 1980s, the sole member of the class functioned as a trials and demonstration unit, acting as a herald to the closely related Class 141. Since its withdrawal, the unit has been preserved at the Keith and Dufftown Railway.
^ abcdefghijklmVehicle Diagram Book No. 220 for Diesel Multiple Unit Trains (Railcars)(PDF). Derby: British Railways Board. 1982. DP222 & DP223. Archived from the original (PDF) on 21 January 2015. Retrieved 19 February 2016 – via Barrowmore MRG.
^ abcdefgFox, Peter (1987). British Railways Pocket Book No. 2: Multiple Units (Summer–Autumn 1987 ed.). Sheffield: Platform 5 Publishing. p. 40. ISBN 0906579740. OCLC 613347580.
^Cite error: The named reference Smith3 was invoked but never defined (see the help page).
^ abLeyland Titan Technical Data(PDF). Southall: British Leyland UK. June 1978. Lit. No. 1683. Archived (PDF) from the original on 31 January 2022. Retrieved 21 December 2022.
^"Class 140". The Railway Centre. Archived from the original on 9 March 2005.{{cite web}}: CS1 maint: unfit URL (link)
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