MRWA G class

Midland Railway of Western Australia G class
G51 at Northcliffe in July 1986
Type and origin
Power typeDiesel-electric
BuilderEnglish Electric, Rocklea
Build date1963
Total produced2
Specifications
Configuration:
​
 • AARC-C
 • UICCo-Co
Gauge1,067 mm (3 ft 6 in)
Wheel diameter3 ft 1+1⁄2 in (0.953 m)
Minimum curve250 ft (76.200 m)
Wheelbase32 ft (9.754 m) total, 11 ft 6 in (3.505 m) bogie
Length41 ft (12.497 m) over headstocks
Width8 ft 11 in (2.718 m)
Height12 ft 7 in (3.835 m)
Axle load12+1⁄2 long tons (12.7 t; 14.0 short tons)
Loco weight75 long tons (76.2 t; 84.0 short tons)
Fuel typeDiesel
Fuel capacity700 imp gal (840 US gal; 3,200 L)
Prime moverEnglish Electric 8SVT Mk II
RPM range450–850 rpm
Engine typeFour-stroke, four valves per cylinder
Aspirationturbocharged
GeneratorEE819/7E
Traction motorsSix EE548A
Cylinders8 Vee
Cylinder size10 in × 12 in (254 mm × 305 mm)
MU working110V, stepless electro-pneumatic throttle
Loco brakestraight air
Train brakesvacuum
Performance figures
Maximum speed55 miles per hour (89 km/h)
Power output1,030 hp (770 kW) gross, 950 hp (710 kW) net
Tractive effort43,000 lbf (191.3 kN) at 5.9 mph (10 km/h)
Career
OperatorsMidland Railway of Western Australia
Number in class2
NumbersG50-G51
First run7 May 1963
PreservedG50
Disposition1 preserved, 1 scrapped

The G class were a class of diesel locomotives built by English Electric, Rocklea for the Midland Railway of Western Australia in 1963. They were later sold to the Western Australian Government Railways.

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