British Rail 11001

British Rail 11001
Type and origin
Power typeDiesel-mechanical
BuilderBritish Railways’ Ashford Works
Order number3410
Build date1949
Total produced1
Specifications
Configuration:
​
 • Whyte0-6-0 dm
 • UICC
Gauge4 ft 8 1⁄2 in (1,435 mm) standard gauge
Wheel diameter4 feet 6 inches (1.37 m)
Loco weight49.45 long tons (50.24 t)
Prime moverPaxman RPH Series 1
TransmissionMechanical, SSS Powerflow 3-speed gearbox
Train heatingNone
Performance figures
Power outputEngine: 500 brake horsepower (370 kW)
Tractive effort33,500 pounds-force (149 kN)
Career
Axle load classRoute availability
RetiredAugust 1959
DispositionScrapped, December 1959

11001 was one of the first British Railways diesel locomotives. It was built in 1949 at British Railways' Ashford Works. It was designed by O. V. S. Bulleid when he was Chief Mechanical Engineer of the Southern Railway. It was powered by a Paxman RPH Series 1 engine, capable of delivering 500 bhp at 1,250 rpm. It was driven via a Vulcan Sinclair fluid coupling to an SSS (Synchro-Self-Shifting) Powerflow gearbox. The gearbox provided three forward and reverse gears in either high or low range. It gave a top speed ranging from 5 mph (8 km/h) in 1st gear, low range up to 36 mph (58 km/h). It had an 0-6-0 wheel formation.


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