British Rail HS4000

HS4000 "Kestrel"
HS4000 outside Derby Locomotive Works, 1968-08-31.
Type and origin Power type Diesel-electric Builder Hawker Siddeley, at Brush Traction, Loughborough Serial number Brush 711 Build date 1968
Specifications Configuration: ​  • UIC Co'Co' Gauge 4 ft 8 ^1⁄2 in (1,435 mm) Wheel diameter 3 ft 9 in (1.143 m) Wheelbase 51 ft 8 in (15.75 m) Length 66 ft 6 in (20.27 m) Width 8 ft 9+3⁄4 in (2.69 m) Height 12 ft 9+3⁄4 in (3.91 m) Loco weight 133 long tons (135 t) Fuel capacity 1,000 imp gal (4,500 L; 1,200 US gal) Prime mover Sulzer 16LVA24 Traction motors Brush, 6 off Transmission AC alternator, DC traction motors Train brakes Dual (Air and Vacuum)
Performance figures Maximum speed 125 mph (201 km/h) Power output Engine: 4,000 hp (2,983 kW) At rail: 3,412 hp (2,544 kW) Tractive effort 70,000 lbf (311.38 kN)
Career Operators British Railways, Soviet Railways Disposition Exported to Russia, later scrapped.

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).