British Rail Class D20/2
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| British Rail Class D20/2 | |
| Power type | Diesel-hydraulic |
|---|---|
| Builder | North British Locomotive Co. |
| Serial number | 27660–27664 |
| Build date | 1958–1959 |
| Total production | 5 |
| Configuration | A1A-A1A |
| UIC classification | (A1A)'(A1A)' |
| Gauge | 4 ft 81⁄2 in (1,435 mm) standard gauge |
| Wheel diameter | Driving: 3 ft 7 in (1.092 m) Idling: 3 ft 3½ in (1.003 m) |
| Wheelbase | 50 ft 0 in (15.24 m) |
| Length | 65 ft 0 in (19.81 m) |
| Width | 8 ft 8 in (2.64 m) |
| Height | 12 ft 10 in (3.91 m) |
| Locomotive weight | 117 long tons (119 t) |
| Fuel capacity | 800 imp gal (3,600 l; 960 US gal) |
| Prime mover | NBL-MAN L12V 18/21S, 2 off |
| Transmission | Hydraulic, Voith L306r |
| Multiple working | ■ Orange Square |
| Top speed | 90 mph (145 km/h) |
| Power output | Engines: 1,000 bhp (746 kW) × 2 |
| Tractive effort | Maximum: 50,000 lbf (222 kN) Continuous: 39,600 lbf (176 kN) |
| Train heating | Steam |
| Locomotive brakeforce | 88 LTf (877 kN) |
| Train brakes | Vacuum |
| Career | British Railways |
| Number | D600–D604 |
| Nicknames | “Warships” |
| Axle load class | Route availability |
| Retired | December 1967 |
| Disposition | All scrapped |
The British Railways Class D20/2 diesel-hydraulic locomotives were built by the North British Locomotive Company in Glasgow during 1957 and 1958. Although never assigned a TOPS class as they were withdrawn before TOPS was introduced British Loco enthusiasts coined the term "Class 41". All were named after Royal Navy vessels, hence the nameplates each bore a subtitle "Warship Class".
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