British Rail Class 77

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
British Rail Class 77
27000 at Crewe Works.JPG
Preserved locomotive, no. 27000 in original black livery.
Type and origin
Power typeElectric
BuilderBR Gorton Works
Build date1953–1954
Total produced7
Specifications
Configuration:
 • 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)
Career
Railroad(s)British Railways
Number27000–27006
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.