British Rail Class 66

British Rail Class 66
66713 'Forest City' at Crewe Works
Type and origin Power type Diesel-electric Builder Electro-Motive Diesel Model JT42CWR or Series 66 Total produced Still in production (508+)
Specifications Configuration: ​  • Whyte Co-Co  • UIC Co'Co' Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Length 20.1 m (65 ft 11 in) Width 2.65 m (8 ft 8 in) Height 3.9 m (12 ft 10 in) Loco weight 129.6 tonnes (127.6 long tons; 142.9 short tons) Fuel capacity 6,400 litres (1,400 imp gal; 1,700 US gal) Prime mover EMD 12N-710G3B-EC Class 66/9: EMD 12N-710G3B-T2 MU working AAR system (Classes 59, 66 & 67) Train heating None Train brakes Westinghouse PBL Air
Performance figures Top speed Class 66/6: 65 mph (105 km/h) Balance of fleet: 75 mph (121 km/h) Power output Engine: 3,000 bhp (2,200 kW) Tractive effort Maximum: 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 Number 66001–66250, 66301–66305, 66401–66435, 66501–66599, 66601–66625, 66701–66732, 66951–66957 Nicknames ‘Shed’ Axle load class Route 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.