Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 36, p. 132. See also National Register of Historic Places Multiple Places Documentation Form, "Logging Railroad Resources of the Coconino and Kaibab Forests, Arizona, certification 1/5/1995, last accessed 14 November 2016 at [] . Works number was 35938 in January 1911.
Arizona Lumber and Timber Company of Flagstaff, Ariz bought the 25 for Greenlaw (based in Cliff, Ariz). The two entities' headquarters towns were not far apart and their railroad headed north to harvest timber near Doney Hill, the San Francisco range, and Sunset Crater. The NPS Documentation claims that the "Kaibab and the Coconino National Forests are part of the largest expanse of ponderosa pine in the world." It stretched in a belt 400 miles (644 km) long by as much as 60 miles (97 km) wide.
The Documentation adds that "timber barons" built more than 770 miles (1,240 km) of rail line to ensur e that "[a]lmost no virgin stand proved safe from the whistle of the locomotive."
The "2-spot" operated for Greenlaw for 14 years before being sold to the Central Arizona. Later it worked for the Saginaw & Manistee, which operated in Arizona in spite of its Michigan names.
A much later photograph of the preserved locomotive shows a rather oversized boiler on small drivers.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 25 |
Locobase ID | 13713 |
Railroad | Greenlaw Lumber Company |
Country | USA |
Whyte | 2-8-0 |
Number in Class | 1 |
Road Numbers | 25 |
Gauge | Std |
Number Built | 1 |
Builder | Baldwin |
Year | 1910 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 12.58 / 3.83 |
Engine Wheelbase (ft / m) | 19.67 / 6 |
Ratio of driving wheelbase to overall engine wheelbase | 0.64 |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 101,500 / 46,040 |
Engine Weight (lbs / kg) | 112,500 / 51,029 |
Tender Loaded Weight (lbs / kg) | 80,000 / 36,287 |
Total Engine and Tender Weight (lbs / kg) | 192,500 / 87,316 |
Tender Water Capacity (gals / ML) | 4000 / 15.15 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1200 / 4542 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 42 / 21 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 44 / 1118 |
Boiler Pressure (psi / kPa) | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 22" / 457x559 |
Tractive Effort (lbs / kg) | 24,786 / 11242.75 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.10 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 200 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 12 / 3.66 |
Firebox Area (sq ft / m2) | 130.10 / 12.09 |
Grate Area (sq ft / m2) | 22.20 / 2.06 |
Evaporative Heating Surface (sq ft / m2) | 1378 / 128.07 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1378 / 128.07 |
Evaporative Heating Surface/Cylinder Volume | 212.65 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 3996 |
Same as above plus superheater percentage | 3996 |
Same as above but substitute firebox area for grate area | 23,418 |
Power L1 | 4132 |
Power MT | 358.99 |