Boyne City, Gaylord & Alpena 2-6-0 "Mogul" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 12984)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 35, p. 323 and Vol 41, p. 194. Works numbers were 33529 in July 1909 and 34941 in July 1910.

Finding the 1906-1907 Mogul pair supplied by Baldwin to be too heavy (Locobase 12983), the BCG & A ordered smaller engines that apparently were more in tune with requirements.

There seems to have been a bit of a kerfuffle, however, over the thickness of the tubes to be supplied. The specification shows #12 WG iron tubes for the boiler, but a later note (11 August 1910) stated: "Railway company complains that #12 WG tubes were furnished instead of No. 11 WG."

What isn't clear is whether the mistake was the railway's in specifying thicker tubes than was wanted or in the railway's in failing to note that #12s were listed in the order dated 7 May 1909 and in the one dated 22 February 1910. Locobase cannot directly determine if the thinner tubes were retrofitted into either engine. He notes that the 15 July 1912 order for the smaller engine #12 clearly specified #11 WG tubes.

Regardless of the outcome of the tube tangle, the pair served the railroad into the 1950s.

Class 11 (Locobase 12983)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 29, p. 117. Works number was 28764 in August 1906 and 30005 in January 1907.

Demand along the upper knuckles of Michigan's mitten led the Boyne City & South Eastern to extend its line east from Boyne Falls to Gaylord, thence to Atlanta, and finally to Alpena, 92 miles away. As such, it was assessed by the Michigan Railroad Commission in 1909 as being " first class condition and show[ing] every indication of safe operation." Although mildly critical of the lack of tools in the cars and the lack of grade-crossing warning signs, the Commission particularly rapped the station at Boyne City, which had "...two small waiting rooms, which it would seem are hardly sufficient for the traveling public."

The newer Moguls supplied by Baldwin in 1906-1907 were considerably larger. In fact, both were too heavy for the 60-70 lb/yard line and were sold to the Midland Valley of the Muskogee Road system in Kansas-Oklahoma, which renumbered them 60-61.

Class 12 (Locobase 12985)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 41, p. 192. Works number was 38407 in September 1912.

Even smaller than the 1909 Moguls (Locobase 12984) was this 1912 Baldwin product, which served this independent short line (which got considerably shorter in 1935) well inton the 1950s.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,984 12,983 12,985
RailroadBoyne City, Gaylord & AlpenaBoyne City, Gaylord & AlpenaBoyne City, Gaylord & Alpena
Number in Class211
Road Numbers10-1111, 1012
Number Built211
BuilderBurnham, Williams & CoBurnham, Williams & CoBaldwin
Valve GearWalschaertStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)12.501412.50
Engine Wheelbase (ft)2021.9220
Ratio of driving wheelbase to overall engine wheebase 0.62 0.64 0.62
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)110,000115,000101,000
Engine Weight (lbs)126,000133,000118,500
Tender Loaded Weight (lbs)90,00090,000
Total Engine and Tender Weight (lbs)216,000223,000
Tender Water Capacity (gals)450045004500
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)616456
Geometry Relating to Tractive Effort
Driver Diameter (in)485048
Boiler Pressure (psi)180180180
High Pressure Cylinders (dia x stroke) (in)19" x 24"19" x 26"18" x 24"
Tractive Effort (lbs)27,61728,72124,786
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.98 4.00 4.07
Heating Ability
Firebox Area (sq ft)137149.80109
Grate Area (sq ft)2528.1020.70
Evaporative Heating Surface (sq ft)150917371303
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)150917371303
Evaporative Heating Surface/Cylinder Volume191.60203.58184.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation450050583726
Same as above plus superheater percentage450050583726
Same as above but substitute firebox area for grate area24,66026,96419,620
Power L1401143713765
Power MT241.17251.38246.55

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