0-6-2

In Whyte notation, a '0-6-2' is a railroad steam locomotive that has six coupled driving wheels followed by two trailing wheels, with no leading wheels.
The equivalent UIC classification is 'C1''.
In the United Kingdom, various designs of locomotives featured the above wheel formation, most notably the suburban passenger LNER N2 locomotive, designed by Sir Nigel Gresley, and the many locomotives of this type used in the South Wales Valleys by the Great Western Railway and its predecessors.
Some locomotives of this arrangement had tenders while others carried their own coal and water tanks and were designated 0-6-2T.
In the United States however, 0-6-2 locomotives were largely 2-6-0 type locomotives that had been rebuilt with a larger firebox and therefore required greater weight distribution near their backs hense the leading wheels were moved in the position of trailing wheels. Nearly all of these units were sent to labor as switch locomotives or sent on branch lines.