British Rail Class 03

The British Rail Class 03 locomotive is, together with Class 04, one of BR's most successful smaller 0-6-0 diesel-mechanical shunters. There are 230 members of the class and it was built by British Railways' Swindon and Doncaster works in 1957-1962. They are numbered D2000-D2199 and D2370-D2399 (later 03004 to 03399). D2370 and D2371 were used as departmental locomotives and originally numbered 91 and 92 respectively.

British Rail Class 03
Class 03 D2069 at Doncaster Works open day on 27 July 2003
Type and origin Power type Diesel-mechanical Builder BR Swindon & Doncaster Build date 1957–1961
Specifications Configuration: ​  • Whyte 0-6-0  • UIC C Gauge 4 ft 8 1⁄2 in (1,435 mm) Wheel diameter 3 ft 7 in (1.092 m) Minimum curve 2 chains (40 m) Wheelbase 9 ft 0 in (2.74 m) Length 26 ft 0 in (7.92 m) Width 8 ft 6 in (2.59 m) Height 11 ft 10 in (3.61 m) Loco weight 30.2 long tons (30.7 t) Fuel capacity 510 imp gal (2,300 L; 610 US gal) Prime mover Gardner 8L3 Transmission Wilson-Drewry CA5 R7, 5-speed epicyclic gearbox, RF11 spiral bevel reverse and final-drive unit. Train heating None Train brakes Vacuum (some dual Air & Vacuum)
Performance figures Top speed 28.5 mph (45.9 km/h) Power output Engine: 204 hp (152 kW) At rail: 152 hp (113 kW) Tractive effort Max: 15,650 lbf (69.6 kN) Brakeforce 13 long tons-force (130 kN)
Career Railroad(s) British Railways Number 11187–11209, 91, 92; later D2000–D2199, D2370–D2399; later 03004–03199, 03370–03399 Axle load class RA 1 Retired from April 1968 Disposition One still in service, over 50 preserved, most scrapped