British Rail Class ES1

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North Eastern Railways Class ES1
NER No.1, Locomotion museum, Shildon
Type and origin
Power type Electric
Builder British Thomson-Houston, with mechanical parts sub-contracted to Brush, for North Eastern Railway
Build date 1903-1904 (contract signed with builders on 15 December 1902)
Total produced 2
 • Whyte Bo+Bo
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Wheel diameter 3 ft 0 in (0.914 m)
Wheelbase 27 ft 0 in (8.230 m)
Length 37 ft 11 in (11.557 m)
Height with pantograph lowered 12 ft 11 in (3.937 m); raised 15 ft 9 in (4.801 m)
Loco weight 56 tons (51 tonnes)
Electric system/s 600–630 V DC
Current pickup(s) Third rail or pantograph
Traction motors British Thomson-Houston, 4 off
Train heating None
Performance figures
Top speed 27 mph (43 km/h)
Power output 640 hp (477 kW)
Tractive effort 25,000 lbf (111.2 kN)
Railroad(s) North Eastern Railway
London and North Eastern Railway
British Railways
Number NER: 1–2
LNER 1–2, later 6480–6481
BR: 26500–26501
Axle load class Route availability 2
First run 1905
Retired 1964
Disposition No.1 preserved, No.2 scrapped in 1966

British Rail Class ES1 was a class of two electric locomotives commissioned by the North Eastern Railway in 1902. They were of steeplecab design.