The reference for locomotives and railcars


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Western Australian Government Railways class W
Australia | 1951 | 60 produced
W934 in April 2012 at Woolshed Flat
W934 in April 2012 at Woolshed Flat

The class W was created after the Second World War as a Mountain with a low axle load, which was mainly intended to pull freight trains and, if necessary, passenger trains. The original design of the WAGR was fundamentally adapted and standardized by Beyer, Peacock & Co. before production started. The first 40 locos were only pre-assembled in England and completed in Australia, while the last 20 were delivered ready to run.

The running gear was basically based on that of the South Australian Railway class 400 Garratt, which was built as a “Double Mountain”. The boiler was built with a combustion chamber, thermic syphons and arch tubes and was optimized for the inferior Collie Fields coal.

Despite the standardization, the locomotives had a few teething problems, which initially led to many breakdowns and required changes to the locomotives. The Silverton Tramway received four identical locomotives, which were also designated as class W. The WAGR retired them between 1968 and 1972. Today, 15 of the 60 locomotives are still ain existence, some of which are regularly used on tourist trains and others are being overhauled.

ManufacturerBeyer, Peacock & Co.
Axle config4-8-2 (Mountain) 
Gauge3 ft 6 in (Cape gauge)
Dimensions and Weights
Wheelbase31 ft 6 in
Fixed wheelbase13 ft 4 1/2 in
Adhesive weight87,040 lbs
Total weight218,480 lbs
Axle load22,050 lbs
Water capacity3,603 us gal
Fuel capacity11,200 lbs (coal)
Power sourcesteam
Estimated power1,400 hp (1,044 kW)
Optimal speed41 mph
Starting effort21,760 lbf
Power Plant
Driver diameter48 in
Boiler pressure200 psi
Expansion typesimple
Cylinderstwo, 16 x 24 in
Grate area27 sq ft
Firebox area187 sq ft
Tube heating area930 sq ft
Evaporative heating area1,117 sq ft
Superheater area305 sq ft
Total heating area1,422 sq ft
Calculated Values
steam locomotive
last changed: 06/2023

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