Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004. Works #2968 in June 1898..
The DMR&N was probably the immediate predecessor of the Duluth, Missabe, and Northern, which was in turn absorbed by the Duluth & Iron Range to become, in 1901, the Duluth, Missabe, and Iron Range (DM&IR). This low-drivered engine probably operated in dual service hauling both the few passenger trains as well as light freight duties. As with many other Brooks engines, this design used the squared-up Belpaire firebox.
It didn't last long on the DMR&N, being sold to the Great Northern as their 991 in 1902. The GN quickly sold 991 to the Isaac Joseph Iron Co. on 28 November 1902. sometime after that this lone engine to the St. Louis, Memphis & Southeastern and ended its days on the Frisco (St. Louis - San Francisco) , first numbered 698, then 2698
| Specifications | |
|---|---|
| Class | 9 |
| Locobase ID | 1226 |
| Railroad | Duluth, Mississippi River, & Northern |
| Whyte | 4-6-0 |
| Road Numbers | 9 |
| Gauge | Std |
| Builder | Brooks |
| Year | 1898 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 14' |
| Engine Wheelbase | 24.33' |
| Ratio of driving wheelbase to overall engine wheebase | 0.58 |
| Overall Wheelbase (engine & tender) | 54.10' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 97800 lbs |
| Engine Weight | 127800 lbs |
| Tender Light Weight | 85000 lbs |
| Total Engine and Tender Weight | 212800 lbs |
| Tender Water Capacity | 4000 gals |
| Tender Fuel Capacity (oil/coal) | 8.5 tons |
| Minimum weight per yard of rail on which locomotive could run | 54.33 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 63" |
| Boiler Pressure | 180 psi |
| Cylinders (dia x stroke) | 18" x 24" |
| Tractive Effort | 18885 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.18 |
| Heating Ability | |
| Firebox Area | 119 sq. ft |
| Grate Area | 20.92 sq. ft |
| Evaporative Heating Surface | 1681 |
| Superheating Surface | |
| Combined Heating Surface | 1681 |
| Evaporative Heating Surface/Cylinder Volume | 237.81 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3765.60 |
| Same as above plus superheater percentage | 3765.60 |
| Same as above but substitute firebox area for grate area | 21420 |
| Power L1 | 6085.58 |
| Power MT | 411.55 |
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