British Rail Class 77

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:
• UIC	Co′Co′
• Commonwealth	Co-Co
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter	3 ft 7 in (1.092 m)
Length	59 ft 0 in (17.98 m)
Loco weight	102.5 long tons (104.1 t; 114.8 short tons)
Electric system/s	1500V DC Catenary
Current pickup(s)	Pantograph, x 2
Traction motors	Metropolitan-Vickers
Train heating	Steam generator
Loco brake	Air and electrical regenerative
Train brakes	Vacuum

Performance figures
Maximum 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
Operators	British Railways
Numbers	27000–27006
Locale	Manchester–Sheffield–Wath line
Retired	September 1968
Disposition	All 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.