British Rail Class 66

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.

British Rail Class 66
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 1⁄2 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


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