British Rail Class 77

The British Rail Class 77, also known as Class EM2, is a class of 1.5 kV DC, Co-Co electric locomotive. They were built by Metropolitan Vickers in 1953–1954 for use over the Woodhead Line between Manchester and Sheffield.

British Rail Class 77
Preserved locomotive, no. 27000 in original black livery.
Type and origin Power type Electric Builder BR Gorton works Build date 1953–1954 Total produced 7
Specifications Configuration: ​  • Whyte Co+Co Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Wheel diameter 4 ft 2 in (1.270 m) Length 59 ft 0 in (17.98 m) Loco weight 102.5 long tons (104.1 t) Electric system/s 1500 V DC Current pickup(s) Pantograph, 2 off Traction motors Metropolitan Vickers Train heating Steam generator Loco brake Air and electrical regenerative Train brakes Vacuum
Performance figures Top speed 90 mph (145 km/h) Power output 2,490 hp (1,857 kW) Tractive effort 45,000 lbf (200 kN) Brakeforce 85 long tons-force (847 kN)
Career Railroad(s) British Railways Number 27000–27006 Retired September 1968 Disposition All sold to Netherlands as NS 1500 Class