British Rail Class 46
The British Rail Class 46 is a class of diesel locomotive. They were built from 1961–1963 at British Railways' Derby Works and were initially numbered D138-D193. With the arrival of TOPS computer system they were renumbered to Class 46. Fifty-six locomotives were built. The first was withdrawn in 1977 and all of them were withdrawn by 1984.
| Derby Type 4 British Rail Class 46 | |
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| Class 46 | |
| Power type | Diesel-electric |
|---|---|
| Builder | British Railways’ Derby Works |
| Build date | 1961–1963 |
| Total production | 56 |
| Configuration | 1Co-Co1 |
| UIC classification | (1Co)'(Co1)' |
| Wheel diameter | 3 ft 9 in (1.143 m) |
| Minimum curve | 3.5 chains (70 m) |
| Wheelbase | 59 ft 8 in (18.19 m) |
| Length | 67 ft 11 in (20.70 m) |
| Width | 8 ft 10+1⁄2 in (2.71 m) |
| Height | 12 ft 10 in (3.91 m) |
| Locomotive weight | 138 long tons (140 t) |
| Fuel capacity | 790 imp gal (3,600 L; 950 US gal) |
| Prime mover | Sulzer 12LDA28-B |
| Multiple working | ★ Blue Star |
| Top speed | 90 mph (145 km/h) |
| Power output | Engine: 2,500 bhp (1,864 kW) At rail: 1,962 hp (1,463 kW) |
| Tractive effort | Maximum: 55,000 lbf (245 kN) |
| Train heating | Steam generator |
| Locomotive brakeforce | 63 long tons-force (628 kN) |
| Train brakes | Vacuum |
| Career | British Railways |
| Number | D138–D193; later 46001–46056 |
| Nicknames | ‘Peak’ |
| Axle load class | Route availability 7 |
The Class 46 design was structurally the same as the earlier Class 45 build, and had the same Sulzer engine. It differed in the fitment of a Brush generator and traction motors, in place of the Crompton Parkinson equipment fitted to the Class 45.
British Rail Class 46 Media
46 026 Leicestershire and Derbyshire Yeomanry - the only named Class 46.
Detail of 46 026's nameplate.
The moment of impact during the nuclear flask test at Old Dalby Test Track, 17 July 1984
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