Locomotive, Steam, 0-6-0 Tank

History: 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. This was the most common wheel arrangement used on both tender and tank locomotives in versions with both inside and outside cylinders.
The type was also widely used for diesel switchers (shunters). Because they lack leading and trailing wheels, locomotives of this type have all their weight pressing down on their driving wheels and consequently have a high tractive effort and factor of adhesion, making them comparatively strong engines for their size, weight and fuel consumption.

For a steam tank locomotive, the suffix usually indicates the type of tank:
- 0-6-0T - side tanks
- 0-6-0ST - saddle tank
- 0-6-0PT - pannier tanks
- 0-6-0WT - well tank

From Wikipedia