The South Australian Railways S class was a class of 4-4-0
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...
s operated by the
South Australian Railways
South Australian Railways (SAR) was the organisation through which the Government of South Australia built and operated railways in South Australia from 1854 until March 1978, when its non-urban railways were incorporated into Australian Natio ...
.
History
The S class locomotives were designed as an express locomotive for the route between Murray Bridge and the border with Victoria. The first 12 were delivered by James Martin & Co in 1894, followed by a further six in 1903/04. They type was notably used to haul the ''Melbourne Express''. The S class had 6'6" driving wheels, the largest of any Australian locomotive, to give it high speeds on low grades.
The engines were pushed out of main line service in the 1920s by 600 class locomotives and Brill railcars. They continued to serve on secondary services into the 1950s. Some locomotives even served in shunting duties despite being unsuitable due to their large wheel diameter. The last examples were retired in 1961.
S136 was set aside for preservation at