0-2-2? |
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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.
| Steam locomotive types |
| Single engine types |
| 0-2-2, 2-2-0, 2-2-2, 2-2-4, 4-2-0, 4-2-2, 4-2-4, 6-2-0 |
| 0-4-0, 0-4-2, 0-4-4, 2-4-0, 2-4-2, 2-4-4, 4-4-0, 4-4-2, 4-4-4 |
| 0-6-0, 0-6-2, 0-6-4, 2-6-0, 2-6-2, 2-6-4, 4-6-0, 4-6-2, 4-6-4 |
| 0-8-0, 0-8-2, 2-8-0, 2-8-2, 2-8-4, 4-8-0, 4-8-2, 4-8-4, 6-8-6 |
| 0-10-0, 0-10-2, 2-10-0, 2-10-2, 2-10-4, 4-10-0, 4-10-2 |
| 0-12-0, 2-12-0, 2-12-2, 2-12-4, 4-12-2 |
| 4-14-4 |
| Duplex engine types |
| 4-4-4-4, 6-4-4-6, 4-4-6-4, 4-6-4-4 |
| Mallet (articulated) types |
| 0-4-4-0, 0-4-4-2, 2-4-4-2 |
| 0-6-6-0, 2-6-6-0, 2-6-6-2, 2-6-6-4, 2-6-6-6, 4-6-6-4 |
| 2-6-8-0 |
| 0-8-8-0, 2-8-8-0, 2-8-8-2, 2-8-8-4, 4-8-8-2, 4-8-8-4 |
| 2-10-10-2, 2-8-8-8-2, 2-8-8-8-4 |