British Rail Class 17
| Clayton Type 1 British Railways class 17 |
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| D8574 at Glasgow Works. | |
| Power type | Diesel-electric |
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| Builder | Clayton Equipment Company & Beyer, Peacock & Co. |
| Build date | 1962–1965 |
| Total production | 117 |
| Configuration | Bo-Bo |
| UIC classification | Bo'Bo' |
| Gauge | 4 ft 81⁄2 in (1,435 mm) standard gauge |
| Wheel diameter | 3 ft 3 1⁄2 in (1.003 m) |
| Minimum curve | 3.5 chains (70 m) |
| Wheelbase | 36 ft 6 in (11.13 m) |
| Length | 50 ft 7 in (15.42 m) |
| Width | 8 ft 9 1⁄2 in (2.68 m) |
| Height | 12 ft 8 in (3.86 m) |
| Locomotive weight | 69 long tons (70.1 t) |
| Fuel capacity | 500 imp gal (2,300 l; 600 US gal) |
| Prime mover | Paxman 6ZHXL, 2 off except D8586–8587: Rolls Royce ‘D’ type V8, 2 off |
| Generator | D8500–D8587: GEC WT800 D8588–D8616: Crompton Parkinson |
| Traction motors | GEC WT421, nose suspended, 4 off |
| Transmission | DC generator, DC traction motors |
| Multiple working | D8500–D8587 ◆ Red Diamond D8588–D8616 ★ Blue Star |
| Top speed | 60 mph (97 km/h) |
| Power output | Engine: 900 hp (671 kW) At rail: 602 hp (449 kW) |
| Tractive effort | Maximum: 40,000 lbf (178 kN) Continuous: 8,000 lbf (35.6 kN) |
| Train heating | None; through steam pipe |
| Locomotive brakeforce | 35 long tons-force (349 kN) |
| Train brakes | Vacuum |
| Career | British Railways |
| Number | D8500–D8616 |
| Axle load class | Route availability 4 |
| Retired | 1968–1971 |
| Disposition | One preserved, remainder scrapped. |
The Clayton Type 1 (later known as Class 17) was a class of diesel locomotive operated by British Railways.
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