British Rail Class 03

British Rail Class 03
03008 at Cambridge station in October 1975
Type and origin Power type Diesel-mechanical Builder British Railways Doncaster & Swindon Build date 1957–1961 Total produced 230
Specifications Configuration: ​  • Whyte 0-6-0DM  • 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 (40.23 m)[1] Wheelbase 9 ft 0 in (2.743 m) Length 26 ft 0 in (7.92 m) Width 8 ft 6 in (2.591 m) Height 12 ft 2+7⁄16 in (3.72 m) 11 ft 10 in (3.61 m) (cut down) Loco weight 30.2 long tons (30.7 t; 33.8 short tons) Fuel capacity 300 imp gal (1,400 L; 360 US gal)[1] Prime mover Gardner 8L3[1] RPM: ​  • Maximum RPM 1200 rpm[2] Transmission Wilson-Drewry CA5 R7,[1] 5-speed epicyclic gearbox, RF11 spiral bevel reverse and final drive unit. Train heating None Train brakes Vacuum (some Dual Air & Vacuum)
Performance figures Maximum speed 28.5 mph (45.9 km/h)[1] Power output Engine: 204 hp (152 kW) At rail: 152 hp (113 kW) Tractive effort Max: 15,300 lbf (68.1 kN)[1] Brakeforce 13 long tons-force (130 kN)
Career Operators British Railways First Capital Connect Numbers 11187–11209, 91, 92; later D2000–D2199, D2370–D2399; later 03004–03199, 03370–03399 Axle load class RA 1 Retired April 1968–1993, 2008 Disposition 56 preserved, remainder scrapped

The British Rail Class 03 locomotive was, together with the similar Class 04, one of British Railways' most successful 0-6-0 diesel-mechanical shunters. 230 were built at Doncaster and Swindon works between 1957 and 1962, and were 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.