2-8-6T

In the Whyte notation for describing steam locomotive wheel arrangement, a 2-8-6 is a locomotive with a two-wheel leading truck, eight driving wheels, and a six-wheel trailing truck. All 2-8-6 locomotives constructed have been tank locomotives of the Mason Bogie pattern, with no tender locomotives with this wheel arrangement made.

Other equivalent classifications are:
UIC classification: 1D3 (also known as German classification and Italian classification)
French classification: 143
Turkish classification: 48
Swiss classification: 4/8

In the UIC classification as applied in Germany and Italy, a rigid-framed locomotive of this arrangement would be 1'D3', and the Mason bogie (1'D)'3'.

Four Mason Bogies of this type were built for the Denver, South Park and Pacific Railroad; #25 Alpine, #26 Rico, #27 Roaring Fork and #28 Denver. They were narrow gauge locomotives of 3 ft (914 mm) gauge. Two more went to the Denver, Utah and Pacific, #10 Middle Park and #19 Denver. The DU&P sold one of the latter to the Burlington and Northwestern Railway, a narrow-gauge affiliate of the CB&Q operating in Iowa.[1][2]

References
  1. Burlington & Western, B&NW Narrow Gauge Branch Lines, Burlington Bulletin No. 30 Archived 2020-06-12 at the Wayback Machine, Burlington Route Historical Society, 1994; page 6.
  2. Mason Bogie loco 2-8-6T narrow gauge B&NW #1 (c1890), BRHS Subject-Photo index, page M Archived 2014-04-13 at the Wayback Machine, Burlington Route Historical Society, May 28, 2013.


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