British Rail Class 33

BRCW Type 3 British Rail Class 33
D6575
Type and origin Power type Diesel-electric Builder Birmingham Railway Carriage and Wagon Company Serial number DEL92–DEL189 (not in order) Build date 1960–1962 Total produced 98
Specifications Configuration: ​  • Whyte Bo-Bo  • UIC Bo'Bo' Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Wheel diameter 3 ft 7 in (1.092 m) Minimum curve 4 chains (80 m) Wheelbase 39 ft 0 in (11.89 m) Length 50 ft 9 in (15.47 m) Width D6500–D6585: 8 ft 10 in (2.69 m) D6586–D6597: 8 ft 1+1⁄2 in (2.5 m) Height 12 ft 8 in (3.86 m) Loco weight 73 long tons (74.2 t) to 77 long tons (78.2 t) Fuel capacity 800 imp gal (3,600 L; 960 US gal) Prime mover Sulzer 8LDA28 Transmission DC generator, DC traction motors MU working ★ Blue Star Train heating Electric Train Heat Train brakes Dual (Air & Vacuum)
Performance figures Top speed 85 mph (137 km/h) Power output Engine: 1,550 bhp (1,156 kW) At rail: 1,215 hp (906 kW) Tractive effort Maximum: 45,000 lbf (200 kN) Continuous: 26,000 lbf (116 kN) Brakeforce 35 long tons-force (349 kN)
Career Railroad(s) British Railways Number D6500–D6597; later 33001–33065, 33101–33119, 33201–33212 Nicknames Cromptons Axle load class Route availability 6

The British Rail Class 33 also known as the BRCW Type 3 or Crompton is a class of Bo-Bo diesel locomotives ordered in 1957 and built for the Southern Region of British Railways between 1959 and 1963.

A total of 98 class 33s were built by the Birmingham Railway Carriage and Wagon Company, and they were called "Cromptons" after the Crompton Parkinson electrical equipment installed in them. Like their lower-powered BRCW sisters (BR classes 26 and 27) their bodywork and cab ends were of all steel construction

The original (1957) number sequence was D6500–D6597.