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 ID16,225
RailroadMinnesota & Northwestern (CGW)
Number in Class2
Road Numbers12, 37/1-2
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)6
Engine Wheelbase (ft)24.42
Ratio of driving wheelbase to overall engine wheebase 0.25
Overall Wheelbase (engine & tender) (ft)24.42
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)45,000
Engine Weight (lbs)75,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)75,000
Tender Water Capacity (gals)1200
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)38
Geometry Relating to Tractive Effort
Driver Diameter (in)48
Boiler Pressure (psi)145
High Pressure Cylinders (dia x stroke) (in)12" x 20"
Tractive Effort (lbs)7395
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.09
Heating Ability
Firebox Area (sq ft)58
Grate Area (sq ft)
Evaporative Heating Surface (sq ft)581
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)581
Evaporative Heating Surface/Cylinder Volume221.93
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area8410
Power L13859
Power MT378.12


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