Newton & Northwestern 4-4-0 "American" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 101)

Data from Alfred Bruce, The Steam Locomotive in America: Its Development in the 20th Century (New York: Bonanza Books, 1952), p. 275. See the description of the N&NW at . (Many thanks to Chris Hohl for his 22 September 2017 email reporting unlikely boiler pressure values for 177 entries. A Locobase macro caused the error .) Works number was 38876 in October 1905.

Although this engine was purchased for the N&NW, that Iowa railroad was shortly to be absorbed by the interurban-minded Fort Dodge, Des Moines & Southern.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID101
RailroadNewton & Northwestern
Number in Class1
Road Numbers2
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.50 / 2.59
Engine Wheelbase (ft / m)22.92 / 6.99
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender) (ft / m)45.40 / 13.84
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)57,000 / 25,855
Engine Weight (lbs / kg)90,500 / 41,050
Tender Loaded Weight (lbs / kg)76,500 / 34,700
Total Engine and Tender Weight (lbs / kg)167,000 / 75,750
Tender Water Capacity (gals / ML)3500 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)48 / 24
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)62 / 1575
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)15,214 / 6900.96
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.75
Heating Ability
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)17.10 / 1.59
Evaporative Heating Surface (sq ft / m2)1224 / 113.75
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1224 / 113.75
Evaporative Heating Surface/Cylinder Volume194.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2736
Same as above plus superheater percentage2736
Same as above but substitute firebox area for grate area
Power L1
Power MT

All material Copyright ©
Wes Barris