0-2-2
An
0-2-2, in the
Whyte notation for the classification of
steam locomotives by
wheel arrangement, is one that has two coupled
driving wheels followed by two
trailing wheels, with no
leading wheels .
The equivalent
UIC classification is
A1.
The 0-2-2 arrangement was used in the early days of the steam locomotive, and little thereafter. A famous 0-2-2 is
Stephenson's Rocket. Its fellow competitor in the
Rainhill Trials,
John Ericsson and
John Braithwaite's
Novelty, was also an 0-2-2. Eight subsequent Stephenson locomotives for the
Liverpool and Manchester Railway were of the 0-2-2 type; these were
Meteor,
Comet,
Dart,
Arrow,
Phoenix,
North Star,
Northumbrian, and
Majestic, following which Stephenson locomotives switched to the
2-2-0 Planet type. The pioneering American locomotive
Tom Thumb was also of 0-2-2 configuration.
