British Rail Class EF1

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British Rail Class EF1
Power type Electric
Builder Flag of the United Kingdom North Eastern Railway
Build date 1914-1919
Total production 10
AAR wheel arr. Bo-Bo
Gauge 1435 mm
Electric system(s) 1500V DC
Curent collection method Pantograph
Engine type 4x275hp, Siemens
Power output 820 kW (1100 hp)
Career North Eastern Railway
LNER
British Railways
Class LNER & BR: EB1
Number in class 10
Number NER: 3-12
LNER: 6490-6499
BR: 26502-26511
Retired April 1964


The British Rail Class EF1 (Electric Freight 1) was a class of electrically powered locomotives used by British Rail in England. They were used during the pre-TOPS period. They were also classified as British Rail Class EB1 for a short period of time, although only a single locomotive was completely modified to EB1 condition.

These locomotives were built by the North Eastern Railway to haul coal trains from the mines at Shildon to the docks at Middlesbrough. During the 1920s the coal traffic declined and some of the locomotives became surplus to requirements. In 1928 a plan was devised to convert one of them to a Diesel-electric, using a 1,000hp Beardmore diesel engine driving an English Electric generator. This plan did not come to fruition.

Electric traction on the Shildon line was discontinued in 1935 but the locomotives were retained for possible future use. Number 11 (later BR 26510) was rebuilt in 1942 for use on the Manchester-Sheffield line, and given the classification EB1. Horsepower was increased from 1,100 to 1,256 and the twin pantographs were replaced by a single central one.

It was expected that all the locomotives would be similarly modified but this did not happen and the remaining locos were classified as EF1 In 1949, number 26510 was moved to Ilford Depot (Eastern Region) for use as a shunter. Number 26510 was transferred to departmental stock (as DS100) in 1959 and withdrawn in 1964.

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