British Rail Class 13
13003 at Tinsley TMD
Power type	Diesel-electric
Builder	British Railways Darlington Works (builder and rebuilder)
Build date	1965 (rebuilt)
Total produced	3
Configuration	0-6-0+0-6-0
UIC classification	C+C
Gauge	4 ft 8 1⁄2 in (1,435 mm) Standard gauge
Wheel diameter	4 ft 6 in (1.372 m)
Wheelbase	42 ft 1 1⁄2 in (12.84 m)
Length	60 ft 1 in (18.31 m)
Width	8 ft 6 in (2.59 m)
Height	12 ft 8 1⁄2 in (3.87 m)
Locomotive weight	120 long tons (122 t)
Fuel capacity	1,336 imp gal (6,070 l; 1,604 US gal)
Prime mover	English Electric 6KT, 2 off
Traction motors	EE, four off
Transmission	DC generators, DC traction motors, double reduction gearing
Multiple working	Not fitted (except control of slave by master)
Top speed	20 mph (32 km/h)
Power output	Engine: 350 hp (261 kW) × 2
Tractive effort	Maximum: 70,000 lbf (311.4 kN)
Train heating	None
Locomotive brakeforce	37 long tons-force (370 kN)
Train brakes	Vacuum
Career	British Railways
Number	D4500–D4502, later 13001–13003
Axle load class	RA 8
Retired	1983–1986

The British Rail (BR) Class 13 were created in 1965 because of the need to provide more powerful shunters for the Tinsley Marshalling Yard. This was achieved by permanently coupling together two Class 08 shunters as a 'master and slave' (alternatively 'cow and calf') units, the latter with its cab removed. Both units were ballasted to improve traction.

Initially the units were coupled cab-to-cab but it was found more practical to couple master nose to slave cab.

A larger, rigid locomotive could not be used because of the risk of grounding on the marshalling yard hump.

  Units

Three pairs were formed as follows:

• Master unit D4190 and Slave unit D4189 to form D4501, later 13001
• Master unit D4187 and Slave unit D3697 to form D4502, later 13002
• Master unit D4188 and Slave unit D3698 to form D4500, later 13003

  Withdrawal

With the end of hump shunting at Tinsley the class became obsolete. The unique qualities of the locomotives were not required elsewhere and so withdrawal was inevitable; 13002 was withdrawn in 1983, with the remaining two locomotives going with the closure of Tinsley hump in 1985.

None of this unusual class survives.

• 13001 was scrapped at BREL Swindon Works in May 1985
• 13002 was scrapped at BREL Swindon Works in October 1983
• 13003 was scrapped at BREL Doncaster Works in September 1986

  References

This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. Please improve this article by introducing more precise citations. (October 2009)

• Strickland, David C. (1983). Locomotive Directory—every single one there has ever been. Camberley, Surrey: Diesel and Electric Group. pp. 53–55. ISBN 0-906375-10-X. 

  Further reading

• McManus, Michael. Ultimate Allocations, British Railways Locomotives 1948 - 1968. Wirral. Michael McManus. 

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