British Rail Class 97/6

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British Rail class 97/6
Rail-97651-amoswolfe.jpg
Type and origin
Power typeDiesel-elctric
BuilderRuston & Hornsby
Serial number312990, 431758–431761
Build date1952 (1), 1959 (4)
Specifications
Configuration:
 • Whyte0-6-0
 • UICC
Gauge4 ft 8 12 in (1,435 mm)
Wheel diameter97650: 3 ft 2 12 in (0.978 m)
97651-97654: 3 ft 4 in (1.016 m)
Loco weight97650: 28 long tons (28 t)
97651-97654: 30 long tons (30 t)
Prime moverRuston 6VPH
RPM range1,250 rpm (max)
GeneratorBTH RTB6034
Traction motorsBTH RTA5041 (nose-suspended), 1 off
Loco brakeStraight air
Train brakes97650: none
97651–97654: vacuum
Performance figures
Top speed20 mph (32 km/h)
Power output165 hp (123 kW)
Tractive effort17,000 lbf (75.6 kN)
Career
Railroad(s)British Railways’ Western Region Chief Civil Engineer's department
NumberPWM 650–654 later 97650–97654
Axle load classRA 1

The British Rail Class 97/6 0-6-0 diesel shunting locomotives were purpose-built for departmental duties by Ruston & Hornsby at Lincoln in 1953 (97650) or 1959 (97651-654). There are minor technical differences between 97650 and the 1959 batch.