British Rail Class 81

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British Railways AL1
British Rail Class 81
A row of Class 81 locomotives waiting to be scrapped
Power type Electric
Builder Associated Electrical Industries at Birmingham Railway Carriage and Wagon Company
Build date 1959–1964
Total production 25
Configuration Bo-Bo
UIC classification Bo'Bo'
Gauge ft 8+12 in (1,435 mmstandard gauge
Wheel diameter 4 ft 0 in (1.219 m)
Length 56 ft 6 in (17.22 m)
Width 8 ft 8 12 in (2.65 m)
Height 12 ft 4 14 in (3.77 m)
Locomotive weight 79.60 long tons (80.9 t)
Electric system(s) 25 kV AC
Current collection method Stone-Faiverley ‘V’-type pantograph, 2 off (later 1 off)
Traction motors 847 hp (632 kW) AEI 189 quill drive, 4 off
Top speed 100 mph (161 km/h)
Power output 3,200 hp (2,390 kW)
Tractive effort 50,000 lbf (222 kN)
Train heating Electric Train Heating
Locomotive brakes Air, Rheostatic
Train brakes Vacuum; Dual from 1972–1973
Career British Rail
Number E3001–E3023, E3096, E3097; later 81001–81022
Axle load class Route availability 6
Retired 1968 (2), 1971 (1), 1983–1991
Disposition One preserved, remainder scrapped

The British Rail Class 81 is an AC electric locomotive that formerly operated on the West Coast Main Line of the London Midland Region of British Rail.