British Rail 10800

experimental Bo′Bo′ 800hp diesel-electric locomotive

British Railways 10800 was a diesel locomotive built by the North British Locomotive Company for British Railways in 1950. It had been ordered by the London, Midland and Scottish Railway in 1946 but did not appear until after the 1948 nationalisation of the railways.

British Railways 10800
10800 on the down main platform at Rugby
Type and origin
Power typeDiesel-electric
BuilderNorth British Locomotive Company
Serial number26413
Build date1 July 1950
Specifications
Configuration:
 • WhyteBo-Bo
 • AARB-B
 • UICBo′Bo′
Gauge4 ft 8 12 in (1,435 mm) standard gauge
Wheel diameter3 ft 6 in (1.067 m)
Minimum curve3.75 chains (247.50 ft; 75.44 m)
Wheelbase31 ft 0 in (9.45 m)
Length41 ft 10+12 in (12.76 m)
Width9 ft 2 in (2.79 m)
Height12 ft 9+12 in (3.90 m)
Loco weight69.80 long tons (70.92 t; 78.18 short tons)
Fuel capacity300 imp gal (1,400 L; 360 US gal)
Coolant cap.85 imp gal (390 L; 102 US gal)
Water cap90 imp gal (410 L; 110 US gal)
Prime moverPaxman 16RPHXL Series 2
rebuilt: Maybach MD655
GeneratorDC
Traction motorsBTH 159, DC, four (4) off
Cylinder size7 in × 7+34 in (177.80 mm × 196.85 mm)
rebuilt: 7+14 in × 8+34 in (184.15 mm × 222.25 mm)
TransmissionDiesel electric
MU workingNot fitted
Train heatingClarkson steam generator
Loco brakeBrakeforce: 45 long tons-force (450 kN)
Train brakesVacuum
Performance figures
Maximum speed70 mph (110 km/h)
Power output827 hp (617 kW)
rebuilt: 1,400 hp (1,000 kW)
Tractive effort34,500 lbf (153.5 kN)
Career
OperatorsBritish Railways
Power class3MT; later: Type 1
Numbers10800
Axle load classRoute availability: 4
Retired8 August 1959
DispositionSold Brush Traction, rebuilt into research locomotive Hawk, retired 1968, cannibalised 1972–1976, scrapped 1976.