Atlantic Coast Line 4-4-2 "Atlantic" Locomotives in the USA

Class I-3 (Locobase 12445)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 23, p. 132. Works numbers 18368-18369 in November 1900.

A growth in cylinder volume was the principal difference betwen these two Atlantics of 1900 and the earlier eight that gave the arrangement its name (see Locobase 1113). They were rated to take 10 cars up a 32 ft/mile grade (about 0.6%) at 40 mph (64 kph).

Both were retired in April 1934.

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Class I/I-1 (Locobase 1113)

Data from ACL's 1913 Locomotive Diagram supplied by Allen Stanley in May 2005 from his extensive Rail Data Exchange. See also DeGolyer, Volume 19, p. 188.

Works numbers were 14180-14184, which were credited to several ACL constituents. In order, these were the Richmond & Petersburg (their 230), the Petersburg (265), two to the Wilmington & Weldon (151-152), and one to the Northeastern Railroad of North Carolina (10). The last two produced to the 19" x 24", 72"driver dimensions were produced in October 1897 (15530-15531) for the Wilmington & Weldon (155) and Petersburg (266), respectively.

A single Atlantic produced in August 1895 (works 14395) was numbered 153 on the Wilmington & Weldon. This engine went on display at the 1895 Cotton States Exposition in Atlanta.

First true Atlantic built for US service. Although other 4-4-2s had appeared earlier, this design included the larger firebox that was the rationale for the extra, 42" (1,067 mm) diameter trailing truck. The specs called for the ability to haul ten passenger coaches up a 32 foot grade at 40 mph (64 km/h). Baldwin estimated adhesion weight at 65,000 lb (29,484 kg) and engine weight at approximately 120,000 lb (54,431 kg).

The 1913 Diagram book shows several subclasses; these probably reflect the different railroads of origin.. The 1942 edition shows a slightly larger firebox with 14 sq ft of fire brick tubes. It also notes that Baldwin delivered locomotives in 1894-95 and in 1896-1897.