Data from GN 1916 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. For Tooele Valley, see the excellent review "Tooele Valley Railway (1908-1982)" on the UtahRails.net site at [], last accessed 26 August 2019.
The BA&P was built by Marcus Daly in 1892 to move the copper from his Butte-area mines over 26 miles (42 km) of 75-lb (37.5 kg/metre) track to the big smelter at Anaconda. The quartet of Consolidations in this entry helped move that ore until 1913, when the Biggest Little Railroad in the World electrified.
Not long after its supercession, 28 moved to the Tooele Valley in Tooele, Utah in January 1916 and took road number 10. TVR was one of three ways ore moved from the Union Pacific junction at Tooele (later Warner), Ut or mine to the enormous smelter at International, Ut. (The other two were Utah Consolidated's 20,000 ft/3.8 mile/6.1 km long tramway from Bingham Canyon and a 10,000 ft/3 mile/1.9 km tunnel bored by Utah Metals.)
The Great Northern bought the 26 & 27 in February 1917, classed them F-12 and renumbered them 1326-1327. Light-footed, low-drivered, and quite powerful for their size, the pair served the GN into the 1940s.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 25 / F-12 |
Locobase ID | 8833 |
Railroad | Butte, Anaconda & Pacific |
Country | USA |
Whyte | 2-8-0 |
Number in Class | 4 |
Road Numbers | 25-28/1326-1327 |
Gauge | Std |
Number Built | 4 |
Builder | Alco-Rogers |
Year | 1907 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 14.50 / 4.42 |
Engine Wheelbase (ft / m) | 22.25 / 6.78 |
Ratio of driving wheelbase to overall engine wheelbase | 0.65 |
Overall Wheelbase (engine & tender) (ft / m) | 54.67 / 16.66 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 41,750 / 18,938 |
Weight on Drivers (lbs / kg) | 167,000 / 75,750 |
Engine Weight (lbs / kg) | 186,000 / 84,368 |
Tender Loaded Weight (lbs / kg) | 122,000 / 55,338 |
Total Engine and Tender Weight (lbs / kg) | 308,000 / 139,706 |
Tender Water Capacity (gals / ML) | 6000 / 22.73 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 12 / 11 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 70 / 35 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 52 / 1321 |
Boiler Pressure (psi / kPa) | 200 / 1380 |
High Pressure Cylinders (dia x stroke) (in / mm) | 21" x 28" / 533x711 |
Tractive Effort (lbs / kg) | 40,368 / 18310.64 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.14 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 360 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 12.81 / 3.90 |
Firebox Area (sq ft / m2) | 180 / 16.73 |
Grate Area (sq ft / m2) | 46 / 4.28 |
Evaporative Heating Surface (sq ft / m2) | 2579 / 239.68 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 2579 / 239.68 |
Evaporative Heating Surface/Cylinder Volume | 229.86 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 9200 |
Same as above plus superheater percentage | 9200 |
Same as above but substitute firebox area for grate area | 36,000 |
Power L1 | 5375 |
Power MT | 283.83 |