British Rail Class 77

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British Rail Class 77
Preserved locomotive, no. 27000 in original black livery.
Type and origin
Power typeElectric
BuilderBR Gorton works
Build date1953–1954
Total produced7
 • WhyteCo+Co
Gauge4 ft 8 12 in (1,435 mm) standard gauge
Wheel diameter4 ft 2 in (1.270 m)
Length59 ft 0 in (17.98 m)
Loco weight102.5 long tons (104.1 t)
Electric system/s1500 V DC
Current pickup(s)Pantograph, 2 off
Traction motorsMetropolitan Vickers
Train heatingSteam generator
Loco brakeAir and electrical regenerative
Train brakesVacuum
Performance figures
Top speed90 mph (145 km/h)
Power output2,490 hp (1,857 kW)
Tractive effort45,000 lbf (200 kN)
Brakeforce85 long tons-force (847 kN)
Railroad(s)British Railways
RetiredSeptember 1968
DispositionAll sold to Netherlands as NS 1500 Class

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.