Class D-2 (Locobase 8775)

Data from Soo 9 - 1943 Steam Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 13, p. 264. Works numbers ran 8700-8702, 8705-8708, 8712-8715, 8718, 8720, 8722 in August 1887 and 8824-25, 8829, 8831-32, 8835-8837, 8843 in October 1887.

This relatively numerous class of Moguls went to the WC in 1887 as the railroad consolidated itself in the Nemesha-based line that would later become part of the Soo.

Four were sold to Wisconsin companies in the 1920s: Consolidated Water, Power & Paper Company (2106, ex-114); Fountain Campbell Lumber Company (2110, ex-118); Stack Lumber Company (2114, ex-122); and Manistique Lime & Stone Company (2119, ex-127).

Class D-2 - compound (Locobase 11170)

Data from Soo 9 - 1943 Steam Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also "D2 Mogul (2-6-0) Loc0motive for the 'Soo Line'", Railroad Gazette, Volume XXXV [35], No 43 (23 October 1903), p. 757. Works numbers were 27370-27372 in April 1903; 29259-29265, 30452-30457, 40118-40119, 40499-40513, 41078-41087, 42148-42169. Production months are shown as September 1903, June 1905, September 1906, and February 1907.

This was a large class of cross-compound Moguls of relatively generous proportions. The HP cylinder was supplied by a 12" (305 mm) piston valve while the LP cylinder used an Allan-Richardson slide valve.

See Locobase 16376 for the single engine superheated using Cole's design with the cross- compound in this class as well as a contemporary analysis of such a combination's value.

They were later superheated by the Soo and given outside Walschaert gear; see Locobase 8764.

Class D-2-S (Locobase 8764)

Data from Soo 9 - 1943 Steam Locomotive Diagrams and Soo 1930 Locomotive Diagrams supplied in May 2005 and August 2013, respectively, by Allen Stanley from his extensive Rail Data Exchange collection.

This large class was originally delivered as a cross-compound, saturated-boiler design; see Locobase 11170, except for one that was delivered with a superheater in 1905. The class apparently continued as cross-compounds until they were superheated, at which time the shops replaced 123 of the small tubes with the 21 superheater flues. They also installed outside Walschaert valve gear. Engine weight grew by about 3 tons.

Locobase's date for the superheater installation is an estimate, but a 1932 roster shows that many of the class retained their compound setups even at that late date.

All were dismantled in the 1920s and 1930s. The diagram in the Soo book shows the first to go was 160 in August 1926, the last was 155 in November 1935.

Class D-2-first superheater (Locobase 16376)

Data from "Compound Mogul with Superheater - M, St P, & SSM Ry.", Railway Master Mechanic, Volume 29, No. 10 (October 1905), 347-348; and "The Compound Locomotive and the Superheater", Railway Age, Volume 39, No. 22 (14 April 1905), pp. 586-587. (Thanks to Chris Hohl for his 1 October 2021 email pointing out the correct engine weight.)

Locobase 11170 shows all of the other members of this large cross-compound Mogul class. During the production run, however, Schenectady's Cole set one of the D-2s aside to install its own design of superheater. Essentially a Schmidt firetube type, but "improved", its marriage of compounding and superheating suited the Soo just fine as they had found that combination to be "of a most satisfactory character" in their other locomotives.

Putting it to work in North Dakota, however, presented a tough test as the water was "strongly impregnated with alkali" would be a "crucial one for that device [superheater], since if it can operate successfully in such water, there are no water difficulties it cannot surmount."

A more general comment about the reinforcing benefits of compounding and superheating is presented in Locobase 9709's discussion of the single superheated compound Consolidation delivered in the same year.

Class J/D (Locobase 8772)

Data from Soo 9 - 1943 Steam Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

These Moguls were produced in two batches, which accounts for the break in builder's numbers: The first four --1878-1881--were ordered by the Minneapolis & Pacific. Only a little while later, the reconstituted Minneapolis, Sault Ste Marie & Atlantic ordered 2001-2004.

Although the railroad's shops dismantled four in the 1920s, four others enjoyed second careers. Midland Continental bought the 103 and 106 in May 1923 and June 1929. 105 wnet to Northwest Cooperage and Lumber in December 1929 and in October 1930, Bourke bought the 104

Class K/D-1 (Locobase 1326)

Data from Soo 9 - 1943 Steam Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004.

Works #1214-1218 (April 1887), 1275-1279 (October 1887).

1349-1358 (March 1888) appear to be from the same class, but they're described as having gone to the Minneapolis, St. Paul & Sault Ste Marie (Soo Line) in 1892.

Bigger Moguls than the Baldwin Ds with larger cylinders, higher BP, and taller drivers. Original number series ran from 69 through the mid-80s, non-consecutively. Sold for scrap beginning in 1925 and ending in 1933.

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