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New South Wales D58 class locomotive
The D58 class was a class of steam locomotives built by the New South Wales Government Railways in Australia. They were built with the 4-8-2 wheel arrangement.
==Design==
In 1943 approval was given for the New South Wales Government Railways Workshops to build 25 freight locomotives. The design was a modified version of the 57 class. The main alterations were the use of a rack and pinion valve gear in lieu of the Gresley 2:1 conjugated vale gear for the middle cylinder and the use of smaller cylinders to enable the locomotives to run to on the Main North line to Broadmeadow, a route which had a tighter loading gauge. They also used a Woodard divided drive of twin coupling rods between the second and third driving wheels. A valance was fitted over the valve gear on the front platform.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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