British Rail Class 11

British Rail Class 11
Type and origin Power type Diesel-electric Builder LMS/BR Derby & BR Darlington Build date 1945–1952 Total produced 120
Specifications Configuration: ​  • Whyte 0-6-0  • UIC C Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Wheel diameter 4 ft 0+1⁄2 in (1.232 m) Minimum curve 3.5 chains (70 m) Wheelbase 11 ft 6 in (3.51 m) Length 29 ft 1+1⁄2 in (8.88 m) Width 8 ft 5 in (2.57 m) Height 12 ft 5+1⁄2 in (3.80 m) Loco weight 47.4 long tons (48.2 t) Fuel capacity 660 imp gal (3,000 L; 790 US gal) Prime mover English Electric 6KT Generator English Electric 801 — 441 A, 430 V Traction motors English Electric 506, 2 off Cylinders Straight 6 Transmission DC generator, DC traction motors, double reduction gearing MU working Not fitted Train heating None Train brakes Vacuum
Performance figures Top speed 20 mph (32 km/h) Power output Engine: 350 hp (261 kW) Tractive effort Maximum: 34,900 lbf (155.2 kN) Brakeforce 32.2 long tons-force (321 kN)
Career Railroad(s) War Department Nederlandse Spoorwegen (NS) London, Midland and Scottish Railway British Railways HNRC heritage railways Number in class WD: 14 (10 to NS) LMS/BR: 106 Number WD: 70260–70273 LMS: 7120–7129 BR: 12033–12138 Axle load class RA 5

The British Rail Class 11 is a diesel shunting locomotive built from April 1945 to December 1952. They are based on a similar earlier batch built by the London, Midland and Scottish Railway (LMS) between 1934 and 1936.