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Queensland Beyer-Garratt class
The Queensland Beyer-Garratt class locomotive was a 4-8-2+2-8-4 steam locomotive of the Queensland Railways. The locomotives operated on gauge.
==Overview==
A Garratt (also known as Beyer-Garratt) is a type of steam locomotive that is articulated in three parts. Its boiler is mounted on the centre frame, and two steam engines are mounted on separate frames, one on each end of the boiler. Articulation permits larger locomotives to negotiate curves and lighter rails that might restrict large rigid-framed locomotives. Many Garratt designs aimed to double the power of the largest conventional locomotives operating on their railways, thus reducing the need for multiple locomotives and crews.
The initial plan had been to use these engines on the proposed air-conditioned Mail Trains that were being designed at the time. This never eventuated, although they did regularly haul the “Midlander”, mainly between Emerald and Bogantungan for some years. They were used on the Rockhampton Mail and Sunshine Express in the early 1950s.
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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