Duluth & Northern Minnesota 2-8-2 "Mikado" Type Locomotives

Introduction

The Duluth & Northern Minnesota was a logging railroad based in Knife River, MN. The railroad was no longer viable in 1919 and it was abandoned. Among the steam locomotive it owned was a Baldwin-built 2-8-2, which was its number 14. The locomotive was bought by and used on the Lake Superior & Ishpeming Railroad. Number 14 was brought to Minnesota and was restored in 1992 to run excursions on the North Shore Scenic Railroad. It was withdrawn from service in October 1998 and is now in storage serviceable at the Lake Superior Transportation Museum in Duluth, MN.

Roster by Richard Duley

Qty.Road NumbersYear BuiltBuilder
1141913Baldwin

Class Details by Steve Llanso

Class 13 (Locobase 13024)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 48, p. 235. Baldwin works numbers were 39664-39665 in April 1913.

These Mikados were the newest iron (well, mostly steel) on the D&NM and had many years left on the meter when the D&NM was sold in 1921. Both went over to the Lake Superior & Ishpeming as their 15, 14 in class Mk-1. In March 1959, the 14 was sold to the Inland Steel Company.


Specifications by Steve Llanso
Class13
Locobase ID13024
RailroadDuluth & Northern Minnesota
CountryUSA
Whyte2-8-2
Road Numbers13-14 / 21-22
GaugeStd
BuilderBaldwin
Year1913
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase14'
Engine Wheelbase28.42'
Ratio of driving wheelbase to overall engine wheebase 0.49
Overall Wheelbase (engine & tender)57.33'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers137000 lbs
Engine Weight178000 lbs
Tender Light Weight115000 lbs
Total Engine and Tender Weight293000 lbs
Tender Water Capacity6000 gals
Tender Fuel Capacity (oil/coal)10 tons
Minimum weight of rail (calculated) on which locomotive could run57 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter51"
Boiler Pressure200 psi
Cylinders (dia x stroke)20" x 28"
Tractive Effort37333 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.67
Heating Ability
Firebox Area153 sq. ft
Grate Area41.30 sq. ft
Evaporative Heating Surface3299 sq. ft
Superheating Surface
Combined Heating Surface3299 sq. ft
Evaporative Heating Surface/Cylinder Volume324.03
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation8260
Same as above plus superheater percentage8260
Same as above but substitute firebox area for grate area30600
Power L16786
Power MT436.80

Photos

Credits

Introduction and roster provided by Richard Duley. Class details and specifications provided by Steve Llanso of Sweat House Media.