British Rail Class D16/2

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British Rail Class D16/2
10203 approaching Bletchley, 1954
Power type Diesel-electric
Builder BR Ashford Works (2), Brighton Works (1)
Order number SR Order 3441
Build date 1950 (10201/10202)
1954 (10203)
UIC classification 1Co'Co1'
Gauge ft 8+12 in (1,435 mm)
Wheel diameter Driving: 3 ft 7 in (1.092 m)
Idling: 3 ft 1 in (0.940 m)
Minimum curve 4.5 chains (91 m)
Wheelbase 55 ft 6 in (16.92 m)
Length 63 ft 9 in (19.43 m)
Width 9 ft 3 in (2.82 m)
Height 13 ft 1 in (3.99 m)
Locomotive weight 133 long tons (135 t)
Fuel capacity 1,150 imp gal (5,200 l; 1,380 US gal)
Prime mover English Electric 16SVT
Traction motors English Electric 526A, 6 off
Top speed 90 mph (140 km/h)
Power output 10201/2: 1,750 bhp (1,300 kW)
10203: 2,000 bhp (1,500 kW)
Tractive effort 10201/2: 48,000 lbf (213.5 kN)
Train heating Steam
Train brakes Vacuum
Career British Railways
Number 10201–10203
Axle load class RA 6

British Railways Class D16/2 was a class of prototype diesel locomotive built by BR at Ashford Works and introduced in 1950–1951, with a third example being introduced in 1954. They had been designed by Oliver Bulleid for the Southern Railway before the 1948 nationalisation but did not appear until after nationalisation. The diesel engine and transmission were supplied by the English Electric company but the Bulleid influence was obvious. The box-like body style closely resembled Bulleid's electric locomotives and was quite different from the usual English Electric style, typified by British Rail Class D16/1.