St Louis-San Francisco 4-6-4 "Hudson" Locomotives in the USA

Class 1060 (Locobase 165)

Data from 1947 and 1951 St L-SF locomotive diagram books supplied in May 2005 from the extensive collection of Allen Stanley. (Thanks to Chris Hohl for correcting the valve gear ID; and for his 22 September 2017 email reporting unlikely boiler pressure values for 177 entries. A Locobase macro caused the error.) See also thelibrary.org, Springfield-Greene County Library District Springfield, Missouri, last accessed 15 September 2014 at [], which archives photos of many of the class.1062, 1064-1066 were converted in 1937, 1063 and 1068 in 1940, and 1060-1061, 1067 in 1941.

Originally delivered in 1917 as Pacifics with Jacobs-Shupert fireboxes; see Locobase 8535. These leaked and were generally unsatisfactory. Only in 1937, however, were these rebuilt as the powerful 4-6-4s as shown here. Frisco mechanics substantially increased grate and firebox areas and the firebox heating surface was enhanced by one thermic syphon. Inside the boiler, installation of ten more superheater flues in place of several dozen tubes resulted in an increase in superheater area of 240 sq ft (22.3 sq m). 13" (341 mm) piston valves supplied steam to the cylinders.

A cosmetic update featured a wide valence above the running gear on both sides that had "The Frisco Lines" enclosed in a long red diamond. Its tender was also emblazoned with similar livery, except that the red diamond embraced the engine's number.

Photographs show that the class retained the color bands up to the time the engines were scrapped. The 1951 diagram book notes that the class was "dismissed from service" between 23 October 1950 and 23 January 1952.