Minnesota & Northwestern 2-4-4 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class G/Motor (Locobase 16225)

Data from CGW 7 1902 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Raildata collection.

Specifications by Steve Llanso of Sweat House Media
Locobase ID16225
RailroadMinnesota & Northwestern (CGW)
Number in Class2
Road Numbers12, 37/1-2
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase6'
Engine Wheelbase24.42'
Ratio of driving wheelbase to overall engine wheebase 0.25
Overall Wheelbase (engine & tender)24.42'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers45000 lbs
Engine Weight75000 lbs
Tender Light Weight
Total Engine and Tender Weight75000 lbs
Tender Water Capacity1200 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)38 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter48"
Boiler Pressure145 psi
Cylinders (dia x stroke)12" x 20"
Tractive Effort7395 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.09
Heating Ability
Firebox Area58 sq. ft
Grate Area
Evaporative Heating Surface581 sq. ft
Superheating Surface
Combined Heating Surface581 sq. ft
Evaporative Heating Surface/Cylinder Volume221.93
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation0
Same as above plus superheater percentage0
Same as above but substitute firebox area for grate area8410
Power L13859
Power MT378.12


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