Duluth & Northern Minnesota 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 13022)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 29, p. 228. Baldwin works numbers were 29645, 29721 in December 1906; 32166 in November 1907; 33338 in April 1909.

This northern Minnesota railroad was built by Alger Smith lumber and opened in 1898 to exploit the Knife River stands of timber. It gradually extended throughout the region and incidentally offered access to terrific trout fishing, which the D & NM served with occasional excursion trips.

By 1921, however, the Gunnysack Line (named for the food deliveries to logging camps) had reached 99.25 miles from Knife River and was sold to a Mr R Waldron who planned to extend it to Fort William, Ontario. That extension never happened and the rails were pulled up on the northern section.

10 was sold to John H Kaiser Lumber Company of Winter, Wisc before 1915. JHK sold the engine to New Dells Lumber, which operated it on the Delco & Northern for about 20 years before selling the 10 in 1936 to the Dells Pulp & Paper Company .

The 11 and 3 remained with the D&NM until it closed when they went over to the Escanaba & Lake Superior where they were renumbered 16 and 15 respectively. The E & LS sold the engines to the Nahma & Northern.

When the 12 left the D&NM, it went to the Houghton, Chassell & Southwestern in Michigan as their #2. From there, the 2 was sold to the Ontonagon In 1929, the ORR sold the 2 to the EH Wilson Lumber Company.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13022
RailroadDuluth & Northern Minnesota
Number in Class4
Road Numbers10-12, 3 (2nd)
Number Built4
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase11.33'
Engine Wheelbase21.83'
Ratio of driving wheelbase to overall engine wheebase 0.52
Overall Wheelbase (engine & tender)52.25'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers100000 lbs
Engine Weight124000 lbs
Tender Light Weight100000 lbs
Total Engine and Tender Weight224000 lbs
Tender Water Capacity5000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)56 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter56"
Boiler Pressure160 psi
Cylinders (dia x stroke)19" x 26"
Tractive Effort22795 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.39
Heating Ability
Firebox Area146 sq. ft
Grate Area25 sq. ft
Evaporative Heating Surface1657 sq. ft
Superheating Surface
Combined Heating Surface1657 sq. ft
Evaporative Heating Surface/Cylinder Volume194.21
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4000
Same as above plus superheater percentage4000
Same as above but substitute firebox area for grate area23360
Power L14178
Power MT276.33

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.