British Rail Class 66

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British Rail Class 66
66713 'Forest City' at Crewe Works.jpg
66713 'Forest City' at Crewe Works
Type and origin
Power typeDiesel-electric
BuilderElectro-Motive Diesel
ModelJT42CWR or Series 66
Total producedStill in production (508+)
Specifications
Configuration:
 • WhyteCo-Co
 • UICCo'Co'
Gauge4 ft 8 12 in (1,435 mm) standard gauge
Length20.1 m (65 ft 11 in)
Width2.65 m (8 ft 8 in)
Height3.9 m (12 ft 10 in)
Loco weight129.6 tonnes (127.6 long tons; 142.9 short tons)
Fuel capacity6,400 litres (1,400 imp gal; 1,700 US gal)
Prime moverEMD 12N-710G3B-EC
Class 66/9: EMD 12N-710G3B-T2
MU workingAAR system (Classes 59, 66 & 67)
Train heatingNone
Train brakesWestinghouse PBL Air
Performance figures
Top speedClass 66/6: 65 mph (105 km/h)
Balance of fleet: 75 mph (121 km/h)
Power outputEngine: 3,000 bhp (2,200 kW)
Tractive effortMaximum: 409 kN (91,900 lbf) at starting
Continuous: 260 kN (58,500 lbf) at 15.9 mph (25.6 km/h)
Career
Railroad(s)EWS
Direct Rail Services
Freightliner
FirstGBRf
Fastline
Number66001–66250, 66301–66305, 66401–66435, 66501–66599, 66601–66625, 66701–66732, 66951–66957
Nicknames‘Shed’
Axle load classRoute availability 7

The Class 66 locomotive is a development of the Class 59 and used both on British and European railway networks—where it is marketed as EMD Series 66.