2-6-6-2

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A preserved 2-6-6-2ST (Saddle Tank) locomotive.
A preserved 2-6-6-2ST (Saddle Tank) locomotive.
Narrow gauge 2-6-6-2 locomotive.
Narrow gauge 2-6-6-2 locomotive.

In Whyte notation, 2-6-6-2 refers to a railroad steam locomotive that has two leading wheels followed by six coupled driving wheels, a second set of six coupled driving wheels, and two trailing wheels. This type of locomotive was commonly used in North America on logging railways.

Other equivalent classifications are:
UIC classification: 1CC1 (also known as German classification and Italian classification)
French classification: 130+031
Turkish classification: 34+34
Swiss classification: 3/4+3/4

The UIC classification is refined to (1'C)C1' for Mallet locomotives.

The 2-6-6-2 wheel arrangement also appeared in Soviet Russia as a standard gauge (5 foot gauge) locomotive built by Kolomna works. The P34 was a modern but compact Mallet. Only one was built, the next Mallet from the Kolomna works was a much larger machine the P38 2-8-8-4.

[edit] See also

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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
0-3-0
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 • 4-4-6
0-6-0 • 0-6-2 • 0-6-4 • 2-6-0 • 2-6-2 • 2-6-4 • 2-6-6 • 4-6-0 • 4-6-2 • 4-6-4
0-8-0 • 0-8-2 • 0-8-4 • 2-8-0 • 2-8-2 • 2-8-4 • 2-8-6 • 4-8-0 • 4-8-2 • 4-8-4 • 4-8-6 • 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
Garratt (articulated) types
Mallet (articulated) types
(includes Triplex)
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 • 2-6-8-0 • 4-6-6-2 • 4-6-6-4
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
Engerth (articulated) types
0-4-4 • 0-4-6
2-6-2 • 0-6-4 • 0-6-4-0
0-8-4 • 0-8-6