Missouri & North Arkansas 2-8-2 "Mikado" Locomotives in the USA

Class 19 (Locobase 13269)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 34, p. 122. See Locobase 6638 for a short history of the road, including a discussion of the 1914 accident that took 43 lives. Works numbers were 34201-34202 in January 1910.

This is an interesting follow-on to an earlier locomotive. The M & NA had bought several Consolidations (Locobase 11409) in 1907 that presumably had the power the railroad needed. The Mikados in this entry were identical in power and boiler dimensions. The only difference was the addition of a trailing truck under the firebox and substitution of an outside radial valve gear arrangement for the earlier link motion.

Both were scrapped in 1933.

Class 21 (Locobase 13270)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 43, p. 207. See Locobase 6638 for a short history of the road, including a discussion of the 1914 accident that took 43 lives. Works numbers were 38827-38828 in December 1912 and 41315-41317 in April 1914.

When the M&NA adopted a superheated boiler for their Mikado design, they followed the prevailing practice of exchanging boiler pressure for the installation of superheating. But the design also introduced larger cylinders and balanced the loss of small tubes with the area provided by the big flues.

These served the M&NA and its successor Missouri & Arkansas until 1949.