4-8-4+4-8-4

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NSWGR AD60 Beyer-Garratt, in storage at the Dorrigo Rail Museum.

A 4-8-4+4-8-4, in the Whyte notation for the classification of steam locomotives by wheel arrangement, is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-8-4 locomotives operating back to back.

Other equivalent classifications are:
UIC classification: 2D2+2D2 (also known as German classification and Italian classification)
French classification: 242+242
Turkish classification: 48+48
Swiss classification: 4/8+4/8

There were only two classes of 4-8-4+4-8-4 steam locomotives across the globe, all of which were constructed by Beyer, Peacock. The first built were thirty class EC3 of the Kenya Uganda Railway (KUR), constructed in three batches in 1939, 1940 and 1949. These later became classes 57 and 58 of the East African Railways (EAR). The second were the Australian New South Wales Railways AD60 class Garratts, of which there were 42 (6001 to 6042) constructed in 1952.^[1]

[edit] Survivors

None of the East African Railways locomotives survive, but four of the New South Wales AD60 class are preserved.^[2]

[edit] References

1. ^ Gavin Hamilton. Garratt Locomotives produced by Beyer Peacock. The Garratt Locomotive. Retrieved on 2008-01-12.
2. ^ Gavin Hamilton. Surviving Garratt Locomotives. The Garratt Locomotive. Retrieved on 2008-01-12.

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