The H-class is a class of 2 steam locomotives of the Western Australian Government Railways

Western Australian Government Railways

Western Australian Government Railways was most common name of the Western Australian government rail transport authority from 1890 to 1976. It is, in its current form, known as the Public Transport Authority of Western Australia....

 first introduced in the 1890s. Their wheel arrangement was 0-6-0

0-6-0

Under the Whyte notation for the classification of steam locomotives, 0-6-0 represents the wheel arrangement of no leading wheels, six powered and coupled driving wheels on three axles, and no trailing wheels...

.

Details

The locomotives were initially numbered H17 and H18.
The locomotives were used mainly on construction and had various owners.

Namesake

There is also a Bo-Bo

Bo-Bo

A Bo-Bo or Bo′Bo′ is a locomotive with two independent four-wheeled bogies with all axles powered by individual traction motors...

 H-class diesel locomotive

WAGR H class (diesel)

The H-class is a class of diesel locomotives of the Western Australian Government Railways first introduced in 1965 for use on the new standard gauge lines. Their wheel arrangement was Bo-Bo. - Details :...

 of the 1960s used on the construction of the standard gauge

Standard gauge

The standard gauge is a widely-used track gauge . Approximately 60% of the world's existing railway lines are built to this gauge...

network.