British Rail Class 22
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| North British Type 2 diesel-hydraulic British Rail Class 22 |
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| D6343 with Hymek D7072 at Old Oak Common, 1965. | |
| Power type | Diesel-hydraulic |
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| Builder | North British Locomotive Co. |
| Build date | 1959–1962 |
| Total production | 58 |
| Configuration | B-B |
| UIC classification | B'B' |
| Gauge | 4 ft 81⁄2 in (1,435 mm) standard gauge |
| Wheel diameter | 3 ft 7 in (1.092 m) |
| Wheelbase | 31 ft 6 in (9.6 m) |
| Length | 46 ft 8½ in (14.24 m) |
| Width | 8 ft 8 in (2.6 m) |
| Height | 12 ft 10 in (3.9 m) |
| Locomotive weight | D6300–D6305: 68 long tons (69.1 t) D6306–D6357: 65 long tons (66.0 t) |
| Fuel capacity | 450 imp gal (2,000 l; 540 US gal) |
| Prime mover | MAN L12V18/21A or 21B |
| Transmission | Hydraulic: Voith LT306r |
| Multiple working | D6300–D6305: ■ Orange square D6306–D6357: ◆ White diamond |
| Top speed | 75 mph (121 km/h) |
| Power output | Engine: 1,000 hp (746 kW) or 1,100 hp (820 kW) |
| Tractive effort | Maximum: 40,000 lbf (177.9 kN) |
| Train heating | 1,000 pounds (450 kg) per hour steam generator |
| Train brakes | Vacuum |
| Career | British Railways |
| Number | D6300–D6357 |
| Nicknames | Baby Warship |
| Axle load class | GWR: ●Yellow BR: Route availability 4 |
| Retired | 1967–1972 |
| Disposition | All scrapped |
The British Rail Class 22, or "Baby Warship", was a class of diesel-hydraulic locomotives designed for the Western Region and built by North British Locomotive Company. They were very similar in appearance to the Class 21 diesel-electrics.
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