Atchison, Topeka & Santa Fe Railway 2-10-4 No. 5017
Green Bay, WI, United States
Location: National Railroad Museum
Status: Display
Posted: Sep 22, 2005 @ 21:09:03 by peter m. preston
When the Atchison, Topeka & Santa Fe Railroad purchased its last group of 2-10-2 locomotives it had the Baldwin Locomotive Works equip one of them (number 3829) with a four-wheel trailing truck to see what difference there would be between a 2-10-2 and a 2-10-4. This experimental locomotive, deliverd in 1919, was the first ever of this wheel arrangement. The experiment ended without any conclusion results or any name given to this wheel arrangement, and No. 3829 was kept in service as a 2-10-4 until it was retired in 1955.

Six years later, in 1925, the Lima Locomotive Works designed a new locomotive by add a fifth set of drivers and increasing the cylinders of the "Berkshire" and created a true 2-10-4. The first railroad to take delivery of this new "Super power" was the Texas & Pacific railroad in 1925. Because the AT&SF design was merely an experiment no name had been attached to the 2-10-4 wheel arrangement in 1919. After the delivery, in 1925, the 2-10-4 was given the name "Texas" for the Texas & Pacific.