Minneapolis, Red Lake & Manitoba 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 4 (Locobase 12750)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 40, p. 32. See Harold D Hagg, "Logging Line: A History of the Minneapolis, Red Lake and Manitoba", Minnesota History (Winter 1972), pp. 123-135 (archived at http://collections.mnhs.org/MNHistoryMagazine/articles/43/v43i04p123-135.pdf) and William and Madeline Sutherland, "The Red Lake Line" archived in the history of Buena Vista, Minn at http://uts.cc.utexas.edu/~woss/index.html#TOC. Works number was 37568 in March 1912.

This was an extremely northerly railway that ran up from Bemidji on Lake Superior to the southern shore of Red Lake across the international border in Manitoba Province. Although the initial goad to building this remote line was timber, its impact on the region took a much broader form. Harold Hagg's summation [p. 137] echoes those offered for many rural rail lines of the 19th and early 20th Centuries:

"The Red Lake railroad also provided vastly improved freight, mail, and passenger service to the Red Lake Indians and residents of the region before the automobile and motor truck became commonplace. The railroad lessened rural isolation and helped brighten the social life of the scattered settlers."

The 4's size was constrained by the railroad's light construction and 60-lb rail. The MRL & M was abandoned in September 1938.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12750
RailroadMinneapolis, Red Lake & Manitoba
Number in Class1
Road Numbers4
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase10.50'
Engine Wheelbase20.58'
Ratio of driving wheelbase to overall engine wheebase 0.51
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers78000 lbs
Engine Weight103000 lbs
Tender Light Weight80000 lbs
Total Engine and Tender Weight183000 lbs
Tender Water Capacity4000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)43 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter56"
Boiler Pressure180 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort18950 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.12
Heating Ability
Firebox Area124 sq. ft
Grate Area20.60 sq. ft
Evaporative Heating Surface1385 sq. ft
Superheating Surface
Combined Heating Surface1385 sq. ft
Evaporative Heating Surface/Cylinder Volume219.67
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3708
Same as above plus superheater percentage3708
Same as above but substitute firebox area for grate area22320
Power L15342
Power MT452.96

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