British Rail HS4000

prototype 4000-hp diesel locomotive

HS4000, named Kestrel, was a prototype high-powered mainline diesel locomotive built in 1968 by Brush Traction to demonstrate its wares to British Railways. The name came from Hawker Siddeley (the owner of Brush) 4000 hp (the power rating of its Sulzer engine).

HS4000 "Kestrel"
HS4000 outside Derby Locomotive Works, 1968-08-31.
Type and origin
Power typeDiesel-electric
BuilderHawker Siddeley, at Brush Traction, Loughborough
Serial numberBrush 711
Build date1968
Specifications
Configuration:
 • UICCo'Co'
Gauge4 ft 8 12 in (1,435 mm)
Wheel diameter3 ft 9 in (1.143 m)
Wheelbase51 ft 8 in (15.75 m)
Length66 ft 6 in (20.27 m)
Width8 ft 9+34 in (2.69 m)
Height12 ft 9+34 in (3.91 m)
Loco weight133 long tons (135 t)
Fuel capacity1,000 imp gal (4,500 L; 1,200 US gal)
Prime moverSulzer 16LVA24
Traction motorsBrush, 6 off
TransmissionAC alternator, DC traction motors
Train brakesDual (Air and Vacuum)
Performance figures
Maximum speed125 mph (201 km/h)
Power outputEngine: 4,000 hp (2,983 kW)
At rail: 3,412 hp (2,544 kW)
Tractive effort70,000 lbf (311.38 kN)
Career
OperatorsBritish Railways, Soviet Railways
DispositionExported to Russia, later scrapped.