British Rail Class 13
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| BR Class 13 | ||
|---|---|---|
| TOPS numbers | 13 001 – 13 003 | |
| Early numbers | D4501,D4502,D4500 | |
| Builder | BR Darlington | |
| Introduced | 1965 | |
| Wheel Arrangement | 0-6-0 + 0-6-0 | |
| Weight | 120 t 0 cwt | 121,900 kg |
| Height | 12 ft 8 5/8 in | 3.88 m |
| Width|8 ft 6 in | 2.59 m | |
| Length | 60 ft 1 in | 18.31 m |
| Wheel Dia. | 4 ft 6 in | 1.4 m |
| Wheel Base | 2 x5 ft 9 in + 5 ft 9 in; 42 ft 1 ½ in overall | 2 x 1.75 m + 1.75 m; 12.84 m |
| Minimum radius | ||
| Maximum speed | 20 mph | 32 km/h |
| Engine output | 2 x 350 hp at 680 rpm | 2 x 261 kW |
| Max. Tractive Effort | 70,000 lbf | 311 kN |
| Cont. Tractive Effort | ||
| Brake type | ||
| Brake force | 38 te | 379 kN |
| Route availability | 8 | |
| Fuel Tank | 1,336 imp gal | 6.07 m³ |
| Heating type | None | |
The British Rail Class 13 was formed because in 1965 it was found necessary to provide more powerful shunters for the Tinsley Marshalling Yard. This was provided by permanently coupling together two Class 08 shunters as a 'master' and 'slave' unit, 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. The thinking behind adopting this dual locomotive design is that a larger, rigid locomotive could not be used due to the risk of grounding on the hump.
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
Image:13001 Tinsley depot 14 April 1984.jpg With the end of hump shunting Tinsley became obsolete, and the locos were not needed elsewhere and their equipment was aging. Withdrawal was therefore inevitable, 13002 went in 1983, with the remaining two locomotives being withdrawn with the end of hump shunting at Tinsley in 1985. No class 13s survive.
