| HS4000 "Kestrel" |
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HS 4000 at Barrow Hill Open Day 1971 |
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| Specifications |
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Configuration:
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| • UIC | Co′Co′ |
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| Gauge | Initially: 1,435 mm (4 ft 8+1⁄2 in) (UK)
After 1971: 1,520 mm (4 ft 11+27⁄32 in) Russian gauge |
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| Wheel diameter | 3 ft 7 in (1.092 m)
1,092 mm (42.99 in) |
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| Wheelbase | 51 ft 8 in (15.75 m)
Outer wheelset distance to middle axle: 7 ft 3 in (2.21 m)
Inner wheelset distance to middle axle: 7 ft 8 in (2.34 m) |
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| Length | 66 ft 6 in (20.27 m) |
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| Width | 8 ft 9+3⁄4 in (2.69 m) |
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| Height | 12 ft 9+3⁄4 in (3.91 m) |
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| Axle load | ~22.2 long tons
21.5 t (with Class 47 type bogies) |
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| Loco weight | 133 long tons 6 hundredweight (135 t)
126 t |
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| Fuel capacity | 1,000 imp gal (4,500 L; 1,200 US gal) |
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| Prime mover | Sulzer 16LVA24 |
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| Traction motors | 6 Brush Motors (DC) |
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| Transmission | three phase AC alternator, DC traction motors |
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| Train brakes | Dual (Air and Vacuum), electric regenerative dynamic brakes |
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| Performance figures |
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| Maximum speed | 110 mph (180 km/h) |
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| Power output | Engine: 4,000 hp (2,983 kW) @1,100 rpm
At rail: 2,500 kW (3,353 hp) |
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| Tractive effort | 450 kN (100,000 lbf) maximum
270 kN (61,000 lbf) @ 30 km/h (19 mph)
187 kN (42,000 lbf) @ 45 km/h (28 mph) |
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HS4000 Kestrel was a prototype high-powered mainline diesel locomotive that was built in 1967 by Brush Traction, Loughborough, as a technology demonstrator for potential future British Rail and export orders. The locomotive number is a combination of the initials of Hawker Siddeley (the owners of Brush Traction) and the power rating of its Sulzer diesel engine (4,000 hp), making it the most powerful locomotive built by the company.
It was of Co-Co wheel arrangement and was fitted with a Sulzer 16LVA24 engine rated at 4,000 horsepower (3,000 kW) providing a maximum speed of 110 mph (180 km/h) and weighed 133 tonnes. It was painted in a livery of yellow ochre with a broad chocolate-brown band around the lower bodyside separated by a thin white line running around the body.
