Duluth, South Shore, & Atlantic 4-6-2 "Pacific" Locomotives in the USA

Class H (Locobase 1330)

Data from DSS&A 1-1944 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 51417-51418 in July 1912.

Small, light passenger locomotives originally delivered with 64" (1,626 mm) drivers and developing 26,121 lb TE. Firebox heating surface included 28 sq ft of arch tubes. Later fitted with 67" drivers. 550 dismantled in June 1942, 551 in August 1944. (One supposes demand for passenger service along the southern shore of Lake Superior must not have very high in wartime to allow these two relatively young locomotives to be scrapped.)

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Class H-1 (Locobase 1331)

Data from DSS&A 1-1944 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

The largest passenger locomotives delivered to the Duluth, South Shore, and Atlantic. Served until 1951. Two more Pacifics (555-556) were delivered after 1922. One irony about wheel arrangements: this railroad, which so optimistically carried the Atlantic as its ultimate destination, never had a 4-4-2 in its stud.

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Class H-2 (Locobase 6667)

Data from DSS&A 1-1944 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 65968-65969 in November 1924.

This pair followed the first two batches (Locobase 1330, 1331) from Brooks by nine years. Although the new locomotives maintained much of the original light Pacific design, they traded heating tubes for a substantial amount of superheat. Firebox heating surface included 28 sq ft (2.6 sq m) of arch tubes. The radial valve gear worked 12" (305 mm) piston valves.

Nearly 30 years after the pair entered service, they were sold for scrap to Paper Calmenson Company in February 1953