British Rail Class 11

British Rail Class 11
12104 at Stratford MPD in July 1967
Type and origin Power type Diesel-electric Builder LMS/BR Derby & BR Darlington Build date 1945–1952 Total produced 120
Specifications Configuration: ​  • Whyte 0-6-0DE  • 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 (70.41 m) Wheelbase 11 ft 6 in (3.505 m) Length 29 ft 1+1⁄2 in (8.88 m) Width 8 ft 5 in (2.565 m) Height 12 ft 5+1⁄2 in (3.797 m) Loco weight 47.4 long tons (48.2 t; 53.1 short tons) Fuel capacity 660 imp gal (3,000 L; 790 US gal) Prime mover English Electric 6KT Generator English Electric 801 — 441 A, 430 V DC Traction motors English Electric 506, DC, 2 off Cylinders Straight 6 Transmission Diesel-electric, double reduction gearing MU working Not fitted Train heating None Loco brake Air
Performance figures Maximum 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 Operators War Department Danske Statsbaner (DSB) Nederlandse Spoorwegen (NS) London, Midland and Scottish Railway British Railways National Coal Board HNRC Imperial Chemical Industries (ICI) Number in class WD: 14 (10 to NS) LMS/BR: 106 Numbers WD: 70260–70273 LMS: 7120–7129 BR: 12033–12138 Axle load class RA 5 Withdrawn 1967–1972 Disposition 9 currently preserved, 1 destroyed in preservation, remainder scrapped

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