2-2-2 "Single" Locomotives in the USA

The 2-2-2 wheel arrangement was a natural progression from the 0-2-2 and the 2-2-0 arrangements. The additional axle of the 2-2-2 provided more stability and allowed the locomotive to have a larger firebox. It was first found on the Patentee locomotive built by Robert Stephenson and Company in 1833. Locomotives of this wheel arrangement was sometimes called "Singles" because they had a single driven axle (which could also be said of the various other single driven axle wheel arrangements).

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Railroads that used 2-2-2 "Single" Locomotives in the USA (data provided by Steve Llanso of Sweat House Media)

Surviving Examples of 2-2-2 "Single" Locomotives in the USA

No.ClassF.M. WhyteGaugeRailroad LineLocationStatusBuilder InfoNotes
132-2-2T4'-8½"CVRR B&O Railroad Museum, Baltimore, MDdisplaySeth Wilmarth, 1851 Named Pioneer. On loan from the Smithsonian Museum
2-2-2T4'-8½"Reading Museum of Transportation, St. Louis, MOdisplayBaldwin #10174, 05/1889Named Black Diamond
2-2-2Ta few miles offshore, Asbury Park, NJsunk1850
2-2-2Ta few miles offshore, Asbury Park, NJsunk1850