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4-8-4 4-8-4

4-8-4 4-8-4 is a palindrome (it reads the same backward as forward).

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4-8-4 4-8-4 is a tautonym (it is composed of two identical parts). View more tautonyms!


4-8-4 4-8-4 a.k.a. 4-8-4+4-8-4: In the Whyte notation for the classification of steam locomotives by wheel arrangement, the 4-8-4+4-8-4 is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-8-4 locomotives operating back to back, with the boiler and cab suspended between the two engine units. Each engine unit has a two pairs of leading wheels in a leading bogie, followed by four coupled pairs of driving wheels, with two pairs of trailing wheels in a trailing bogie. Since the 4-8-4 type is sometimes known as a Northern, the corresponding Garratt type could be referred to as a Double Northern.

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