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
Class10151
Locobase ID12625 12903
RailroadDes Moines, Iowa Falls & NorthernDes Moines, Iowa Falls & Northern
CountryUSAUSA
Whyte4-4-04-4-0
Number in Class21
Road Numbers101-10251 / 103
GaugeStdStd
Number Built21
BuilderBurnham, Williams & CoBurnham, Williams & Co
Year19021906
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase 9.08' 9.08'
Engine Wheelbase24.29'24.29'
Ratio of driving wheelbase to overall engine wheebase 0.37 0.37
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers70000 lbs70000 lbs
Engine Weight113000 lbs112000 lbs
Tender Light Weight80000 lbs90000 lbs
Total Engine and Tender Weight193000 lbs202000 lbs
Tender Water Capacity4000 gals4000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)58 lb/yard58 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter73"62"
Boiler Pressure180 psi180 psi
Cylinders (dia x stroke)18" x 24"18" x 24"
Tractive Effort16298 lbs19189 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.30 3.65
Heating Ability
Firebox Area149.60 sq. ft149.60 sq. ft
Grate Area18.70 sq. ft18.70 sq. ft
Evaporative Heating Surface1686 sq. ft1686 sq. ft
Superheating Surface
Combined Heating Surface1686 sq. ft1686 sq. ft
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 area2692826928
Power L175416405
Power MT475.00403.45


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