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 Pm701 at the Western Australian Rail Transport Museum | |||||||||||||||||||||||||||||||||||
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The WAGR Pm and Pmr classes were two classes of 4-6-2 tender engine steam locomotives operated by the Western Australian Government Railways (WAGR) between 1950 and the early 1970s.
With the WAGR suffering from a shortage of locomotives and having a backlog of repairs deferred from World War II, authorisation was granted for the construction of 35 4-6-2 locomotives. Initially it was planned that Midland Railway Workshops build 10 with the balance built externally. However capacity constraints at Midland saw the order for the full 35 placed with the North British Locomotive Company, Glasgow. [1] [2] [3] [4]
Nineteen were built as the Pm class with plain bearings on the coupled axles and roller bearings on the carrying axles. The other sixteen were built as the Pmr class with roller bearings on all axles. One Pm was later converted to a Pmr at Midland Railway Workshops. [2] [3] [4]
All entered service in 1950. Although intended to operate passenger services, their independently sprung driving wheels gave a rough ride meaning they could not maintain schedules, hence they were quickly relegated to fast freight trains on the Eastern Goldfields and Great Southern lines and associated branches. Later they were concentrated on the Great Southern and South Western lines. All were withdrawn between 1970 and 1972. [2] [3] [4]
The numbers and periods in service of each member of the Pm and Pmr classes were as follows: [5]
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The WAGR Msa class was a class of 2-6-0+0-6-2 Garratt articulated steam locomotives. The class was built at the Midland Railway Workshops and operated by the Western Australian Government Railways (WAGR) between 1930 and 1963. It was the first Garatt type to be designed and constructed entirely in Australia.
The WAGR E class were a class of 4-6-2 steam locomotives built for the Western Australian Government Railways (WAGR) by English manufacturers Nasmyth, Wilson & Co, Vulcan Foundry and North British Locomotive Company, from 1902. The locomotives provided a huge increase in locomotive power available to the WAGR and were the mainstay traction of WAGR passenger services for two decades. The Es class was the name given to a reconstruction of all but four of the class carried out between 1924 and 1925.
The WAGR D class was a class of 4-6-4T tank locomotive operated by the Western Australian Government Railways (WAGR) between 1912 and 1964.
The WAGR Dm class was a class of 4-6-4T tank locomotive operated by the Western Australian Government Railways (WAGR) between 1945 and 1971.
The WAGR Dd class was a class of 4-6-4T tank locomotive operated by the Western Australian Government Railways (WAGR) between 1946 and 1972.
The WAGR N class was a class of steam locomotives operated by the Western Australian Government Railways (WAGR) from 1896 until 1960.
The WAGR C Class was a class of steam locomotives built by Robert Stephenson and Company for the Western Australian Government Railways in 1880 to the same design as the NZR F class.
The WAGR W class is a class of 4-8-2 steam locomotives operated by the Western Australian Government Railways (WAGR) between 1951 and 1972.
The WAGR S class was a class of 4-8-2 steam locomotives built by the Midland Railway Workshops between 1943 and 1947 and operated by the Western Australian Government Railways (WAGR).
The WAGR P and Pr classes were two classes of 4-6-2 steam locomotives designed for express passenger service on the Western Australian Government Railways mainline network. The initial designs were prepared by E.S. Race and together the two classes had a total build number of thirty-five locomotives, the P and Pr classes entering service in 1924 and 1938 respectively. Both classes were used on express passenger services, greatly improving the economy and speed of long-distance passenger travel in Western Australia, the results of which were most visible on the Western Australian stage of the Trans-Australian Railway and Westland Express.
The WAGR V class was the last class of steam locomotive to enter service with the Western Australian Government Railways (WAGR). The class was part of the post war regeneration plan for the WAGR, intended for the heavy coal traffic between the Collie coal fields and Perth.
The K-class was a class of 2-8-4T steam locomotives of the Western Australian Government Railways
The F class were a class of diesel locomotives built by English Electric, Rocklea for the Midland Railway of Western Australia in 1958. They were later sold to the Western Australian Government Railways.
The WAGR Q class was a six-member class of 4-6-2T tank engine steam locomotives operated by the Western Australian Government Railways (WAGR) between 1896 and 1925.
The WAGR U class was a class of 4-6-2 steam locomotives operated by the Western Australian Government Railways (WAGR) between 1946 and the late 1960s. One was rebuilt as a 4-6-4 tank locomotive.
The WAGR F class was a class of 4-8-0 heavy goods steam locomotives operated by the Western Australian Government Railways (WAGR) between 1902 and 1970.
The WAGR C class was a class of light axle load steam locomotives operated by the Western Australian Government Railways (WAGR) between 1902 and 1961. A total of 22 were built in two batches.
The WAGR Ec class was a class of 4-6-2 heavy passenger and goods Vauclain compound locomotives operated by the Western Australian Government Railways (WAGR) between 1901 and 1958.
The WAGR E class was a two-member class of 2-4-4-2T double-Fairlie locomotives operated by the Western Australian Government Railways (WAGR) between 1881 and 1892.
The WAGR G class is a class of steam locomotives operated by the Western Australian Government Railways (WAGR) from 1889. The class's wheel arrangement varied; the first 24 were 2-6-0s and the last 24 4-6-0s.
Media related to WAGR Pm and Pmr classes at Wikimedia Commons
| Steam tender (1,067 mm (3 ft 6 in)) |    | |
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| Steam tank (narrow gauge) | ||
| Steam Garratt (narrow gauge) | ||
| Diesel-hydraulic (narrow gauge) | ||
| Diesel-mechanical (narrow gauge) | ||
| Diesel-electric (narrow gauge) | ||
| Diesel-electric (standard gauge) | ||
