4-6-4+4-6-4

First known tank engine version
First known tank engine version
First use	1936
Country	Sudan
Locomotive	250 class
Railway	Sudan Railways
Designer	Beyer, Peacock & Company
Builder	Beyer, Peacock & Company

Equivalent classifications
Equivalent classifications
UIC class	2C2+2C2
French class	232+232
Turkish class	37+37
Swiss class	3/7+3/7
Russian class	2-3-2+2-3-2

4-6-4+4-6-4
	Zimbabwean 15th class no. 406 Ikolo (Hornbill)
UIC class
Equivalent classifications
UIC class	2C2+2C2
French class	232+232
Turkish class	37+37
Swiss class	3/7+3/7
Russian class	2-3-2+2-3-2
First use
First known tank engine version
First use	1936
Country	Sudan
Locomotive	250 class
Railway	Sudan Railways
Designer	Beyer, Peacock & Company
Builder	Beyer, Peacock & Company

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 4-6-4+4-6-4 is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-6-4 locomotives operating back to back, with the boiler and cab suspended between the two engine units. Each engine unit has two pairs of leading wheels in a leading bogie, followed by three coupled pairs of driving wheels and two pairs of trailing wheels in a trailing bogie.

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