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Rx Class 4-6-0 Ten Wheelers
The Rx were a development of the R class, giving them higher
pressure boilers and larger tenders, to improve their performance
and availability. Their original purpose was as main line
locomotives, but such was their success that they became very
utilitarian locomotives even after the larger Webb locomotives were
introduced in the mid-1920s, and survived until the very end of
steam, even outliving some of the Webb classes that displaced
them.
The 30 R class were all rebuilt as Rx from 1900 through to 1911,
and an additional 54 were constructed originally as Rx, by a range
of builders including Dubs, James Martin of Gawler (the original
30 R), SAR's Islington workshops, North British and Walkers of
Maryborough, Queensland. Most were scrapped in the late 1960s,
but 8 survive in various parks throughout the state, with 2 kept
in running order on the Mount Barker-Victor Harbour tourist
line.
Rx93
Rx201
Rx207
Rx224