British Rail Class D3/1

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British Rail Class D3/1
Power type Diesel-hydraulic
Builder North British Locomotive Company
Serial number 27751–27761, 27995–27997
Build date 1958–1959
Total production 14
Configuration 0-4-0 DH
UIC classification B
Gauge ft 8+12 in (1,435 mmstandard gauge
Wheel diameter 3 ft 9 in (1.143 m)
Locomotive weight 36.00 long tons (36.58 t)
Prime mover NBL/MAN W6V17.5/22AS (supercharged)
Transmission Hydraulic, Voith
Multiple working Not fitted
Top speed 20 mph (32 km/h)
Power output Engine: 330 bhp (246 kW)
Tractive effort 24,100 lbf (107.2 kN)
Train heating None
Career British Railways
Class D3/1; later 3/4; no TOPS class
Number D2900–D2913
Retired February 1967
Disposition All scrapped

British Rail Class D3/1 was a locomotive commissioned by British Rail in England. It was a diesel powered locomotive in the pre-TOPS period built by the North British Locomotive Company. The NBL/MAN engines were built by the North British Locomotive Company in Scotland under licence from the German company MAN.