British Rail Class 97/6

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British Rail class 97/6
Rail-97651-amoswolfe.jpg
Type and origin
Power type Diesel-elctric
Builder Ruston & Hornsby
Serial number 312990, 431758–431761
Build date 1952 (1), 1959 (4)
Specifications
Configuration:
 • Whyte 0-6-0
 • UIC C
Gauge 4 ft 8 12 in (1,435 mm)
Wheel diameter 97650: 3 ft 2 12 in (0.978 m)
97651-97654: 3 ft 4 in (1.016 m)
Loco weight 97650: 28 long tons (28 t)
97651-97654: 30 long tons (30 t)
Prime mover Ruston 6VPH
RPM range 1,250 rpm (max)
Generator BTH RTB6034
Traction motors BTH RTA5041 (nose-suspended), 1 off
Loco brake Straight air
Train brakes 97650: none
97651–97654: vacuum
Performance figures
Top speed 20 mph (32 km/h)
Power output 165 hp (123 kW)
Tractive effort 17,000 lbf (75.6 kN)
Career
Railroad(s) British Railways’ Western Region Chief Civil Engineer's department
Number PWM 650–654 later 97650–97654
Axle load class RA 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.