Des Moines, Iowa Falls & Northern 4-4-0 "American" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 101 (Locobase 12625)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 25, p. . Works numbers were 20977 and 20979 in September 1902.

Locobase 11410 sketches the corporate history of the DM, IF & N. The 101 and 102 were relettered for the Saint Paul & Des Moines in 1908. When the SP & DM was sold to the Saint Paul & Kansas City Short Line Railroad in August 1911 the engines were renumbered 52-53.

As noted in Locobase 11410, the SP & KCSL remained independent until 1948. But their locomotives were renumbered 598-599 for the Rock Island in 1913 and designated E-18. 599 was scrapped in April 1927 with 52 following in March 1928.

Class 51 (Locobase 12903)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 28, p.203. Works number was 27360 in January 1906.

Two earlier Eight-wheelers supplied by Baldwin to the DM, IF & N (Locobase 12625) had the 6-ft-plus drivers of passenger engines. This later stablemate repeated the 1902 design's particulars, but rolled on smaller drivers suitable for mixed-traffic local work. Like the 101-102, the 51 took on the herald from the Saint Paul & Des Moines.

Once the SP & DM was incorporated into the Saint Paul & Kansas City Short Line, the =51 was renumbered 597. As such, it operated into the 1920s before being scrapped in May 1925.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,625 12,903
RailroadDes Moines, Iowa Falls & NorthernDes Moines, Iowa Falls & Northern
Number in Class21
Road Numbers101-10251 / 103
Number Built21
BuilderBurnham, Williams & CoBurnham, Williams & Co
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 9.08 9.08
Engine Wheelbase (ft)24.2924.29
Ratio of driving wheelbase to overall engine wheebase 0.37 0.37
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)70,00070,000
Engine Weight (lbs)113,000112,000
Tender Loaded Weight (lbs)80,00090,000
Total Engine and Tender Weight (lbs)193,000202,000
Tender Water Capacity (gals)40004000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)5858
Geometry Relating to Tractive Effort
Driver Diameter (in)7362
Boiler Pressure (psi)180180
High Pressure Cylinders (dia x stroke) (in)18" x 24"18" x 24"
Tractive Effort (lbs)16,29819,189
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.30 3.65
Heating Ability
Firebox Area (sq ft)149.60149.60
Grate Area (sq ft)18.7018.70
Evaporative Heating Surface (sq ft)16861686
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)16861686
Evaporative Heating Surface/Cylinder Volume238.52238.52
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation33663366
Same as above plus superheater percentage33663366
Same as above but substitute firebox area for grate area26,92826,928
Power L175416405
Power MT475.00403.45

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