British Rail Class 13
Template:Short description Template:Use dmy dates Template:Use British English Template:Infobox locomotive
The British Rail Class 13 was a class of diesel–electric shunting locomotive designed in 1965 to provide more powerful shunters for the Tinsley Marshalling Yard. Due to Tinsley's status as a hump yard, it was not possible to use a single locomotive owing to the risk of grounding. To achieve the required power, a pair of Template:BRC shunters were permanently coupled in master and slave formation, with the slave unit having its cab removed and both units ballasted to improve traction. Initially coupled cab-to-cab, it was found more practical to couple master nose to slave cab.
Units
Three pairs were formed as follows:
| Unit number | Master unit | Slave unit | Withdrawn | Fate | Notes | |
|---|---|---|---|---|---|---|
| Original | TOPS | |||||
| D4501 | 13001 | D4190 | D4189 | January 1985 | Scrapped at BREL Swindon, May 1985 | <ref>Template:Cite web</ref> |
| D4502 | 13002 | D4187 | D3697 | June 1981 | Scrapped at BREL Swindon, October 1982 | <ref>Template:Cite web</ref> |
| D4500 | 13003 | D4188 | D3698 | January 1985 | Scrapped at BREL Doncaster, September 1986 | <ref>Template:Cite web</ref> |
Withdrawal
With the end of hump shunting at Tinsley the class became obsolete. The class's unique features were not required elsewhere and as such were withdrawn; 13 002 was withdrawn in 1981, with the remaining two locomotives scrapped with the closure of Tinsley hump in 1985.<ref>Template:Cite magazine</ref>