British Rail Class ES1

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
Specifications Configuration: ​  • Whyte Bo+Bo Gauge 4 ft 8 1⁄2 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)
Career 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.