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Under the Whyte notation for the classification of steam locomotives, 0-10-2 represents the wheel arrangement of no leading wheels, ten powered and coupled driving wheels on five axles, and two trailing wheels on one axle (usually in a trailing truck).

Other equivalent classifications are:
UIC classification: E1 (also known as German classification and Italian classification)
French classification: 051
Turkish classification: 56
Swiss classification: 5/6

United States[edit]

In the US, this type is known as the Union after the only US railroad to have new locomotives built in this arrangement, these were ten 0-10-2s built for the Union Railroad in the Pittsburgh, Pennsylvania area. They were used as heavy duty transfer locomotives rather than switchers; in Greenville, Pennsylvania, one is on static display lettered for the Duluth Missabe and Iron Range Railway #604 (Upon dieselization, the Union RR sold all of theirs to the DM&IR) .

The Chicago & North Western Railway converted two 2-10-2 locomotives formerly owned by subsidiary Chicago, St. Paul, Minneapolis & Omaha into 0-10-2 locomotives in 1944.[1] They were classified J-1 both before and after conversion. One was scrapped in 1950 and the other in 1953.


In Germany, a number of narrow gauge tank locomotives were built with an 0-10-2 configuration. All used some form of articulated drive that allowed the outer driving axles to move sideways or radially to negotiate curves. An example was a group of locomotives built for the narrow gauge lines of Bosnia that utilised the Klose System for an articulated drive.

External links[edit]


  1. ^ Ross, Don. "Chicago & North Western Class J-1 0-10-2s". Don's Rail Photos. Trinity Technology Co. Archived from the original on 19 September 2008. Retrieved 2008-09-11.