| Weight | 84t 14cwt Superheated 85t 14cwt |
| Driving Wheels | 3ft 6½in |
| Boiler Pressure | 180psi Superheated – 175lbf |
| Cylinders | Outside – 17in x 23in Superheated – 18in x 23in |
| Tractive Effort | 21,115lbf Superheated – 26,082lbf |
57 class F locomotives were built by Dübs and Company and the North British Locomotive Company who were both based in Glasgow. The Western Australian Government Railways (WAGR) orders were built in three batches – 15 in 1902, 12 in 1912 and 30 in 1913. The first batch were by Dübs & Co and the second two by the North British Locomotive Company.
The heavy goods locomotives were designed by T F Rotheram who was the Chief Mechanical Engineer at the WAGR from 1900 until 1903. It was an enlarged version of an earlier one of his designs – the B class.
The last two engines of the second batch, 366 and 367, were delivered with Schmidt superheaters, and were the first superheated locomotives to enter service in Western Australia. They were designated as class Fs locomotives and were found to have greatly improved steaming and fuel economy..
Between 1924 and 1948 all of the F class locomotives, apart from four, were retrofitted with superheaters, and reclassified as Fs class engines. Towards the end of their working lives, some had their superheaters removed as an economy measure.
This locomotive was built by the Great Central Railway at Gorton, Manchester in 1919.
1913 and entered service as F 407. It was fitted with a superheater in 1937 and reclassified as an Fs engine. In 1949 it was renumbered Fs 460.
The locomotive was replaced on main line duties after the Second World War and by 1962 it was placed in store August 1962. It was returned to service in July 1963 and finished its days in service on shunting duties at Collie in August 1971.
After being taken out of service it was stored at the Midland Workshops before being placed in the Rail Transport Museum at Bassendean in Perth in June 1972.
One other F class locomotive built by the North British Locomotive Company has been preserved.
- Fs 452 – Works number 20087
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