Minneapolis, Red Lake & Manitoba 4-6-0 "Ten-Wheeler" Locomotives in 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 []) and William and Madeline Sutherland, "The Red Lake Line" archived in the history of Buena Vista, Minn at []. 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.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID12750
RailroadMinneapolis, Red Lake & Manitoba
Number in Class1
Road Numbers4
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.50 / 3.20
Engine Wheelbase (ft / m)20.58 / 6.27
Ratio of driving wheelbase to overall engine wheelbase 0.51
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)78,000 / 35,380
Engine Weight (lbs / kg)103,000 / 46,720
Tender Loaded Weight (lbs / kg)80,000 / 36,287
Total Engine and Tender Weight (lbs / kg)183,000 / 83,007
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)43 / 21.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)18,950 / 8595.59
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.12
Heating Ability
Tubes (number - dia) (in / mm)196 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.25 / 3.73
Firebox Area (sq ft / m2)124 / 11.52
Grate Area (sq ft / m2)20.60 / 1.91
Evaporative Heating Surface (sq ft / m2)1385 / 128.72
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1385 / 128.72
Evaporative Heating Surface/Cylinder Volume219.49
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 area22,320
Power L15338
Power MT452.63

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