Class 8 (Locobase 8891)

Data from AA-M&LS 1 - 1940 locomotive diagram book dated supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase is cheating just a little by not crediting this small Consolidation to its original owner. Baldwin produced 18777 in March 1901 and sent it to Atlantic Mining Company at that company's number 7. Some time later, the engine went to the M & SL as its #8.

A look at the roster notes from http://www.trainweb.org/annarbor/Rosters/Locomotives/web_steam-engine_roster.htm, accessed 11 November 2007, raises questions. The same Baldwin works number shows up twice and both times the locomotive is described as M & LS #8. But in the later listing, the cylinder stroke has grown by 2". Also, the roster holds two different scrapping dates, in part because the second one shows an Ann Arbor number as the primary ID.

Class E / I-7 (Locobase 7947)

Data from AA-M&LS 1 - 1940 locomotive diagram book dated supplied in May 2005 by Allen Stanley from his extensive collection.

These small Consolidations came on the road soon after the AA had had its 2-8-0s repossessed and sold to the Canadian Pacific. The first two (works #14348-14349) were produced in June 1895 and delivered to the AA; two more (14578-14579) were manufactured in December 1895. Originally numbered 37-40, the class was renumbered in 1909 as 125-128.

125 was sold to the Manistique & Lake Superior. in March 1920 as their #12. 126 stayed on the AA for quite a bit longer, only being sold to the M & LS in September 1939. By then it wore 2370 as part of the Wabash roster.

It appears that in a couple of cases either a boiler was replaced or some tubes were simply removed, because by the time of the 1928 diagram, the class was credited with 159 tubes for a total of 1,185 sq ft and by 1940 126 only had 138 tubes and a total heating surface of 1,179 sq ft.

By the time of the latter's departure, the other two had long been scrapped in January 1933.

Class G/G1 // I-4, I-5 (Locobase 7946)

Data from AA-M&LS 1 - 1940 locomotive diagram book dated supplied in May 2005 by Allen Stanley from his extensive collection.

Delivered as saturated steamers in 1908, this class had what was for the AA the usual assortment of tubes and heating-surface areas ranging from 3,616 to 3,702 sq ft. As delivered, #161 had 425 2" tubes. With the 182-sq ft firebox heating surface (of which 20 sq ft consisted of arch tubes), total evaporative heating surface came to 3,519 sq ft.

The arrangement shown in the specs describes the most numerous variant. (5 G locomotives). The last four came as a separate order in December 1912. When they were superheated, this subclass received Baker valve gear instead of Walschaert; all of the conversions had 12" piston valves.

Except for the 2178, which was scrapped in September 1940, the other G class served the AA until the end of steam. The last four were disposed of in the same month of July 1951. For some reason the G-1s (then class as I-5) went much earlier, the first two in May 1931, the next in December 1935. Only the last, 2183, served through World War II before being scrapped in May 1948.

Class G2 / I-6 (Locobase 7948)

Data from AA-M&LS 1 - 1928 locomotive diagram book dated supplied in May 2005 by Allen Stanley from his extensive collection.

Two of the last 3 Consolidations supplied to the AA had 23 1/2" cylinders, the other (shown in Locobase 7949) had larger cylinders and a higher boiler pressure. But the second of the two had the greater number of boiler tubes and the higher number of arch tubes of the later locomotive. In exchange for the smaller number of arch tubes, the 2350 later was fitted with thermic syphons.

170/2350 was scrapped in November 1940, 171/2351 having gone a month earlier.

Class G2 / I-6 - 25"" (Locobase 7949)

Data from AA-M&LS 1 - 1928 locomotive diagram book dated supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase 7948 shows the first two of this three-locomotive order. For some reason, this last 2-8-0 had larger cylinders and higher boiler pressure, as well as twice as many arch tubes as the first two. The arch tubes contributed 26 sq ft to the firebox heating surface. This locomotive outlasted the first two, operating throughout World War II and being scrapped in October 1946.