Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p . See also Floyd W Mundy (of James H Oliphant & Co), The Earning Power of Railroads (New York: Moody's Magazine Book Department, 1912), p. 379. Works number was 31597 in August 1907.
In 1906, the Norfolk Southern Railroad reorganized its railroad holdings and took control of all Roper stocks and bonds. By 1910, Moody' verbal snapshot illustrates just how big this lumber processor had become: "This company owns ten mills with an annual capacity of 150,000,000 feet of timber, together with timber rights on lands (800,000 acres, of which 600,000 acres owned in fee) containing 3,000,000,000 feet of standing timber."
To move all of this harvest, the Roper Company had laid 150 miles (242 km) of fully equipped standard gauge logging railroads. Altogether, reported Moody's, "The value of the properties of the John L. Roper Lumber Co. has been estimated at an amount exceeding $10,000,000."
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | 25 |
Locobase ID | 13177 |
Railroad | John L Roper Lumber Company |
Country | USA |
Whyte | 2-6-0 |
Number in Class | 1 |
Road Numbers | 25 |
Gauge | Std |
Number Built | 1 |
Builder | Burnham, Williams & Co |
Year | 1907 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 10 / 3.05 |
Engine Wheelbase (ft / m) | 17.25 / 5.26 |
Ratio of driving wheelbase to overall engine wheelbase | 0.58 |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 71,000 / 32,205 |
Engine Weight (lbs / kg) | 80,500 / 36,514 |
Tender Loaded Weight (lbs / kg) | 50,000 / 22,680 |
Total Engine and Tender Weight (lbs / kg) | 130,500 / 59,194 |
Tender Water Capacity (gals / ML) | 2500 / 9.47 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 39 / 19.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 50 / 1270 |
Boiler Pressure (psi / kPa) | 185 / 1280 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14.5" x 24" / 368x610 |
Tractive Effort (lbs / kg) | 15,870 / 7198.52 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.47 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 155 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 9.33 / 2.84 |
Firebox Area (sq ft / m2) | 47.80 / 4.44 |
Grate Area (sq ft / m2) | 13 / 1.21 |
Evaporative Heating Surface (sq ft / m2) | 798 / 74.16 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 798 / 74.16 |
Evaporative Heating Surface/Cylinder Volume | 173.86 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2405 |
Same as above plus superheater percentage | 2405 |
Same as above but substitute firebox area for grate area | 8843 |
Power L1 | 3483 |
Power MT | 324.45 |