| Qty. | Road Numbers | Year Built | Builder |
|---|---|---|---|
| 1 | 14 | 1913 | Baldwin |
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.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 13 |
| Locobase ID | 13024 |
| Railroad | Duluth & Northern Minnesota |
| Country | USA |
| Whyte | 2-8-2 |
| Number in Class | 2 |
| Road Numbers | 13-14 / 21-22 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1913 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14 / 4.27 |
| Engine Wheelbase (ft / m) | 28.42 / 8.66 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
| Overall Wheelbase (engine & tender) (ft / m) | 57.33 / 17.47 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 137,000 / 62,142 |
| Engine Weight (lbs / kg) | 178,000 / 80,740 |
| Tender Loaded Weight (lbs / kg) | 115,000 / 52,163 |
| Total Engine and Tender Weight (lbs / kg) | 293,000 / 132,903 |
| Tender Water Capacity (gals / ML) | 6000 / 22.73 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10 / 9 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 57 / 28.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 51 / 1295 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 28" / 508x711 |
| Tractive Effort (lbs / kg) | 37,333 / 16933.98 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.67 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 350 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 17.25 / 5.26 |
| Firebox Area (sq ft / m2) | 153 / 14.22 |
| Grate Area (sq ft / m2) | 41.30 / 3.84 |
| Evaporative Heating Surface (sq ft / m2) | 3299 / 306.60 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 3299 / 306.60 |
| Evaporative Heating Surface/Cylinder Volume | 324.07 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 8260 |
| Same as above plus superheater percentage | 8260 |
| Same as above but substitute firebox area for grate area | 30,600 |
| Power L1 | 6787 |
| Power MT | 436.87 |
