British Rail Class 12

British Rail Class 12

Infobox Locomotive
name = British Rail Class 12
powertype = Diesel-electric


caption =
roadnumber = 15211–15236
builder = British Railways’ Ashford Works
builddate = 1949–1952
ordernumber = SR 3413 (15), 3537 (11)
totalproduction = 26
gauge = RailGauge|ussg|lk=on|al=on
primemover = English Electric 6KT
transmission = DC generator, DC traction motors, double reduction gearing
tractionmotors = English Electric 506A, 2 off
whytetype = 0-6-0
uicclass = C
wheeldiameter = convert|4|ft|6|in|m|3|abbr=on
minimumcurve =
trainbrakes = None; 15230–15232 Air from 1970
locobrakeforce =
wheelbase = convert|11|ft|6|in|m|2|abbr=on
length = convert|29|ft|5+1/2|in|m|2|abbr=on
width = convert|9|ft|0|in|m|2|abbr=on
height = convert|12|ft|8+1/2|in|m|2|abbr=on
weight = convert|48|LT|sigfig=3|lk=on
topspeed = convert|27.5|mph|km/h|1|abbr=on
poweroutput = "Engine:" convert|350|hp|0|abbr=on|lk=on
tractiveeffort = "Maximum:" convert|24600|lbf|kN|1|abbr=on|lk=on
fuelc
convert|660|impgal|abbr=on|lk=on
trainheating = None
multipleworking = Not fitted
axleloadclass = RA 5
railroad = British Railways The British Rail Class 12 is a diesel locomotive built primarily for shunting duties.

This was the second batch of standard Southern Railway shunters based on the English Electric 6KT 350 hp (260 kW) diesel engine. The first batch (BR numbers 15201-15203) were built by the SR in 1937 and were later classified D3/12.

The locomotives described in this article were built at the BR Ashford Works over the period 1949–1952. They were numbered 15211–15236 and became Class 12. No locomotives survived long enough to acquire Class 12 TOPS numbers.

Technical details

The diesel engine is an English Electric 6-cylinder, 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.

Preservation

The only surviving locomotive of the class is 15224, located at the Spa Valley Railway, Royal Tunbridge Wells.



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