Late Nineteenth Century
The steep 1 in 30 gradients over the Darling Scarp presented a major problem to the early railway system, so in 1893/94 the K class 2-8-4T tank engines were introduced for traffic on this Eastern Railway. The K class were the first class of locomotives designed new for the WAGR, and some were later ordered for use in South Africa. The K class were unfortunately too heavy for branch-line operations and were so restricted to main-line services. In 1896 two new classes were introduced to the WAGR, namely the N Class 4-4-4T suburban tank engines and the O Class 2-8-0T&T, so classified for the presence of tenders and boiler-side fuel-storage bunkers. The N and O classes shared a standard boiler and cylinders which gave them compatibility. The N class were primarily used on suburban passenger and shunting duties - a role which they dominated for almost two decades. The O class were used initially on mainline goods services but were quickly relegated to branch line services where they served successfully. In the event further orders were placed until the class totaled fifty-six, with 10 being built locally at the Midland Railway Workshops.
The R class 4-4-0s represented a radical departure from previous WAGR locomotive design. The engines featured the largest diameter wheels of any WAGR locomotive at 1.45m, which allows for higher speeds at reduced power. Given the nature of WA's railways, however, this was not beneficial and the class saw limited service in their intended role as express engines, but continued to serve in country areas (such as around Northam) for many years. The class numbered 24 and were withdrawn in the mid-1920s when replaced by much larger locomotives.
Read more about this topic: Locomotives Of The Western Australian Government Railways
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