Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 28, p. 265. See also DM&N 4 - 1908 Locomotive Diagrams supplied in May 2005 from his extensive collection. (Thanks to Chris Hohl for his 18 February 2015 email giving the tender's coal capacity.) Works numbers were 27719, 27727 in March 1906.
Among the myriad drag freighters and mammoth coal haulers, this pair of high-wheeled (relatively speaking) passenger engines toiled for about 30 years. The diagram showed the calculated tractive effort at various speeds:
Speed 8 25 45 60
TE (lb) 24,780 17,600 9,860 7,880
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 30, p. 195 and Volume 35, p. 163. See also DM&N 4 - 1908 Locomotive Diagrams supplied in May 2005 from his extensive collection. (Thanks to Chris Hohl for his 18 February 2015 email giving the tender's coal capacity.) Works numbers were 30436-30437 in March 1907 and 34723 in May 1910.
Passengers on the DM & IR travelled behind Ten-wheelers and Pacifics with moderately scaled drivers. The 1907 pair essentially repeated the 1906 locomotives shown in Locobase 12940, but had fewer tubes and smaller drivers. The 1910 engine, although placed in its own F3 class, had identical dimensions.
The diagram showed the calculated tractive effort at various speeds:
Speed 8 25 45 60
TE (lb) 26,500 17,800 10,080 8,200
All served into the middle 1930s.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | F1 | F2/F3 |
Locobase ID | 12940 | 12941 |
Railroad | Duluth, Missabe & Northern (DM&IR) | Duluth, Missabe & Northern (DM&IR) |
Country | USA | USA |
Whyte | 4-6-0 | 4-6-0 |
Number in Class | 2 | 3 |
Road Numbers | 100-101 | 102-104 |
Gauge | Std | Std |
Number Built | 2 | 3 |
Builder | Burnham, Williams & Co | Burnham, Williams & Co |
Year | 1906 | 1906 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 14 / 4.27 | 14 / 4.27 |
Engine Wheelbase (ft / m) | 25.08 / 7.64 | 25.08 / 7.64 |
Ratio of driving wheelbase to overall engine wheelbase | 0.56 | 0.56 |
Overall Wheelbase (engine & tender) (ft / m) | ||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 118,600 / 53,796 | 120,300 / 54,567 |
Engine Weight (lbs / kg) | 166,200 / 75,387 | 164,000 / 74,389 |
Tender Loaded Weight (lbs / kg) | 129,200 / 58,604 | 120,000 / 54,431 |
Total Engine and Tender Weight (lbs / kg) | 295,400 / 133,991 | 284,000 / 128,820 |
Tender Water Capacity (gals / ML) | 6000 / 22.73 | 6000 / 22.73 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10 / 9 | 10 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 66 / 33 | 67 / 33.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 67 / 1702 | 63 / 1600 |
Boiler Pressure (psi / kPa) | 200 / 1380 | 200 / 1380 |
High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 26" / 508x660 | 20" x 26" / 508x660 |
Tractive Effort (lbs / kg) | 26,388 / 11969.41 | 28,063 / 12729.18 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.49 | 4.29 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 270 - 2.25" / 57 | 258 - 2.25" / 57 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 15 / 4.57 | 15 / 4.57 |
Firebox Area (sq ft / m2) | 139.50 / 12.96 | 135 / 12.55 |
Grate Area (sq ft / m2) | 42.50 / 3.95 | 42.80 / 3.98 |
Evaporative Heating Surface (sq ft / m2) | 2512 / 233.37 | 2402 / 223.23 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 2512 / 233.37 | 2402 / 223.23 |
Evaporative Heating Surface/Cylinder Volume | 265.82 | 254.18 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 8500 | 8560 |
Same as above plus superheater percentage | 8500 | 8560 |
Same as above but substitute firebox area for grate area | 27,900 | 27,000 |
Power L1 | 7585 | 6838 |
Power MT | 422.99 | 375.94 |