0-4-0+0-4-0

First known tank engine version
First known tank engine version
First use	1909
Country	Australia
Locomotive	TGR K class
Railway	Tasmanian Government Railways
Designer	Beyer, Peacock & Company
Builder	Beyer, Peacock & Company
Evolved to	2-4-0+0-4-2
Benefits	Total engine mass as adhesive weight
Drawbacks	Instability at speed

Equivalent classifications
Equivalent classifications
UIC class	B+B
French class	020+020
Turkish class	22+22
Swiss class	2/2+2/2, 4/4 from the 1920s
Russian class	0-2-0+0-2-0

0-4-0+0-4-0
	Tasmanian Government Railways K class works photograph
UIC class
Equivalent classifications
UIC class	B+B
French class	020+020
Turkish class	22+22
Swiss class	2/2+2/2, 4/4 from the 1920s
Russian class	0-2-0+0-2-0
First use
First known tank engine version
First use	1909
Country	Australia
Locomotive	TGR K class
Railway	Tasmanian Government Railways
Designer	Beyer, Peacock & Company
Builder	Beyer, Peacock & Company
Evolved to	2-4-0+0-4-2
Benefits	Total engine mass as adhesive weight
Drawbacks	Instability at speed

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 0-4-0+0-4-0 is an articulated locomotive of the Garratt type. The wheel arrangement is effectively two 0-4-0 locomotives operating back-to-back or face-to-face, with the boiler and cab suspended between the two power units. Each power unit has no leading wheels, four powered and coupled driving wheels on two axles and no trailing wheels. A similar arrangement exists for Mallet, Meyer and Fairlie locomotives, but is referred to as 0-4-4-0.