4-8-0+0-8-4

First known tank engine version
First known tank engine version
First use	1929
Country	India
Locomotive	BNR class N
Railway	Bengal Nagpur Railway
Designer	Beyer, Peacock & Company
Builder	Beyer, Peacock & Company

Equivalent classifications
Equivalent classifications
UIC class	2D+D2
French class	240+042
Turkish class	46+46
Swiss class	4/6+4/6, 8/12 from 1920s
Russian class	2-4-0+0-4-2

4-8-0+0-8-4
	Bengal Nagpur Railway class N 815
UIC class
Equivalent classifications
UIC class	2D+D2
French class	240+042
Turkish class	46+46
Swiss class	4/6+4/6, 8/12 from 1920s
Russian class	2-4-0+0-4-2
First use
First known tank engine version
First use	1929
Country	India
Locomotive	BNR class N
Railway	Bengal Nagpur Railway
Designer	Beyer, Peacock & Company
Builder	Beyer, Peacock & Company

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 4-8-0+0-8-4 is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-8-0 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 four coupled pairs of driving wheels and no trailing wheels. A similar wheel arrangement exists for the Union Pacific Big Boy, but is referred to as 4-8-8-4 since only the front engine unit swivels.

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