British Rail HS4000
HS 4000 at Barrow Hill Open Day 1971
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| Type and origin | |
|---|---|
| Power type | Diesel-electric |
| Builder | Hawker Siddeley, at Brush Traction, Loughborough |
| Serial number | Brush 711 (1967) |
| Build date | Completed In 1967 |
| Specifications | |
|---|---|
| Configuration: |
|
| • UIC | Co'Co' |
| 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 |
| Wheel diameter | 3 ft 7 in (1.092 m) 1,092 millimetres (42.99 in) |
| 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) |
| 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) |
| Axle load | ~22.2 long tons 21.5 t (after rebogying with Class 47 type bogies) |
| Loco weight | 133 long tons 6 hundredweight (135 t) 126 t |
| Fuel capacity | 1,000 imp gal (4,500 l; 1,200 US gal) |
| Prime mover | Sulzer 16LVA24 |
| Traction motors | 6 Brush Motors (DC) |
| Transmission | three phase AC alternator, DC traction motors |
| Train brakes | Dual (Air and Vacuum), electric regenerative dynamic brakes |
| Performance figures | |
|---|---|
| Maximum speed | 110 mph (180 km/h) |
| Power output |
Engine: 4,000 hp (2,983 kW) @1100 rpm At rail: 2,500 kW (3,353 hp) |
| 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) |
| 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 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 (4000 HP).
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.
In the mid 1960s British rail produced specifications for type 5 locomotives weighing less than 126t with more than 3,000 hp (2,200 kW) of power for both passenger and freight working. Brush Electric Engineering Ltd. (Brush Traction) in association with Sulzer Brothers Ltd. responded with a 4,000 hp (3,000 kW) locomotive for British Rail's appraisal. The design principle was that a single engine would require less maintenance than twin-engined vehicles, and that the very high power would mean that double heading for freight trains would be unnecessary.
Brush employed Sulzer's 16-cylinder Vee 16LVA24 engine made in Winterthur. Previous experience with Sulzer's 12-cylinder twin parallel-bank dual-crank 12LDA28 engine had gone well, but the highest power available from Sulzer in this form was the 12LDA31 of 2,350 hp (1,750 kW) see The Sulzer engine in diesel traction : A potted and incomplete history. Not only did the V engines provide over 3,000 hp (2,200 kW), but being single-crank with the consequently lighter engine block (over the dual-bank design) gave a better power-to-weight ratio.
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