British Rail Class 11

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British Rail Class 11
Type and origin
Power typeDiesel-electric
BuilderLMS/BR Derby & BR Darlington
Build date1945–1952
Total produced120
Specifications
Configuration:
 • Whyte0-6-0
 • UICC
Gauge4 ft 8 12 in (1,435 mm) standard gauge
Wheel diameter4 ft 0 12 in (1.232 m)
Minimum curve3.5 chains (70 m)
Wheelbase11 ft 6 in (3.51 m)
Length29 ft 1 12 in (8.88 m)
Width8 ft 5 in (2.57 m)
Height12 ft 5 12 in (3.80 m)
Loco weight47.4 long tons (48.2 t)
Fuel capacity660 imp gal (3,000 l; 790 US gal)
Prime moverEnglish Electric 6KT
GeneratorEnglish Electric 801 — 441 A, 430 V
Traction motorsEnglish Electric 506, 2 off
CylindersStraight 6
TransmissionDC generator, DC traction motors, double reduction gearing
MU workingNot fitted
Train heatingNone
Train brakesVacuum
Performance figures
Top speed20 mph (32 km/h)
Power outputEngine: 350 hp (261 kW)
Tractive effortMaximum: 34,900 lbf (155.2 kN)
Brakeforce32.2 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 classWD: 14 (10 to NS)
LMS/BR: 106
NumberWD: 70260–70273
LMS: 7120–7129
BR: 12033–12138
Axle load classRA 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.