British Rail Class 12 facts for kids

Specifications
Configuration:;
• Whyte	0-6-0
• UIC	C
Gauge	4 ft 81⁄2 in (1,435 mm) standard gauge
Wheel diameter	4 ft 6 in (1.372 m)
Wheelbase	11 ft 6 in (3.51 m)
Length	29 ft 5 1⁄2 in (8.98 m)
Width	9 ft 0 in (2.74 m)
Height	12 ft 8 1⁄2 in (3.87 m)
Loco weight	48 long tons (48.8 t)
Fuel capacity	660 imp gal (3,000 l; 790 US gal)
Prime mover	English Electric 6KT
Traction motors	English Electric 506A, 2 off
Transmission	DC generator, DC traction motors, double reduction gearing
MU working	Not fitted
Train heating	None
Train brakes	None; 15230–15232 Air from 1970

Type and origin
Power type	Diesel-electric
Builder	British Railways’ Ashford Works
Order number	SR 3413 (15), 3537 (11)
Build date	1949–1952
Total produced	26

Quick facts for kidsBritish Rail Class 12
Type and origin
Power type	Diesel-electric
Builder	British Railways’ Ashford Works
Order number	SR 3413 (15), 3537 (11)
Build date	1949–1952
Total produced	26
Specifications
Configuration:;
• Whyte	0-6-0
• UIC	C
Gauge	4 ft 81⁄2 in (1,435 mm) standard gauge
Wheel diameter	4 ft 6 in (1.372 m)
Wheelbase	11 ft 6 in (3.51 m)
Length	29 ft 5 1⁄2 in (8.98 m)
Width	9 ft 0 in (2.74 m)
Height	12 ft 8 1⁄2 in (3.87 m)
Loco weight	48 long tons (48.8 t)
Fuel capacity	660 imp gal (3,000 l; 790 US gal)
Prime mover	English Electric 6KT
Traction motors	English Electric 506A, 2 off
Transmission	DC generator, DC traction motors, double reduction gearing
MU working	Not fitted
Train heating	None
Train brakes	None; 15230–15232 Air from 1970
Performance figures
Top speed	27.5 mph (44.3 km/h)
Power output	Engine: 350 hp (261 kW)
Tractive effort	Maximum: 24,600 lbf (109.4 kN)
Career
Railroad(s)	British Railways
Number	15211–15236
Axle load class	RA 5

The British Rail Class 12 is a diesel locomotive built mainly 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. These locomotives (BR numbers 15201-15203) were built by the SR in 1937 and were later classified D3/12.

The Class 12 locomotives 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 though.