British Rail Class 12
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| BR Class 12 | ||
|---|---|---|
| TOPS numbers | None | |
| Early numbers | 15211-15236 | |
| Builder | BR Ashford | |
| Introduced | 1949-52 | |
| Wheel Arrangement | 0-6-0 | |
| Weight | 48 t 0 cwt | 48,800 kg |
| Height | 12 ft 8 5/8 in | 3.88 m |
| Width | 9 ft 0 in | 2.74 m |
| Length | 29 ft 5 3/4 in | 8.99 m |
| Wheel Dia. | 4 ft 6 in | 1.37 m |
| Wheel Base | 5 ft 9 in + 5 ft 9 in | 1.75 + 1.75 m |
| Minimum radius | ||
| Maximum speed | 27.5 mph | 44 km/h |
| Engine output | 350 hp at 680 rpm | 260 kW |
| Max. Tractive Effort | 24,600 lbf | 109 kN |
| Cont. Tractive Effort | ||
| Brake type | Vacuum | |
| Brake force | ||
| Route availability | 5 | |
| Fuel Tank | 660 imp gal | 3,000 litres |
| Heating type | None | |
The British Rail Class 12 is a diesel locomotive built primarily for shunting duties.
This was the second batch of standard SR shunters based on the English Electric 6KT 350 hp (260 kW) diesel engine. They were built at the BR Ashford Works over the period 1949-1952. They were numbered 15211-15236 and became Class 12.
The engine is an English Electric 6-cyl, 4-stroke, 6KT and the traction motors are 2 x EE506 axle-hung, nose-suspended, force-ventilated traction motors with 17.5:1 double reduction gear drive. The Main Generator is an EE type EE801/7D, flange-mounted single bearing rated at 490 kW.
The only surviving locomotive of the class is 15224, located at the Spa Valley Railway, Royal Tunbridge Wells.
