BRITISH RAIL CLASS 12

'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.