4-8-2+2-8-4
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A 4-8-2+2-8-4, in the Whyte notation for the classification of steam locomotives by wheel arrangement, is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-8-2 locomotives operating back to back.
Other equivalent classifications are:
UIC classification: 2D1+1D2 (also known as German classification and Italian classification)
French classification: 241+142
Turkish classification: 47+47
Swiss classification: 4/7+4/7
The Australian Standard Garratt and South African Railways GL class Garratt locomotives are examples of the type.
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