Data from DeGolyer Library of Southern Methodist University Baldwin Specifications, Vol 71, pp. 277+. see also the detailed description of the LL&BC operations at the "Lassen Lumber & Box", citrusmodelinggroup at Yahoo Groups ([], last accessed 30 May 2013). Works number was 56403 in April 1923.
LL&BC opened two mills in Susanville, Calif in 1918. The company had recently won two big harvesting concessions from the National Forest Service in Lassen National Park that were dubbed "Norvel Flat Chance and the McCoy Chance". Total holding was an impressive 300 million feet of timber. The amount of timber under contract was later doubled.
This oil-burning logging Prairie arrived five years later as the LL&BC moved its logging headquarters from Facht to Lasco to place it closer to both the logging and the link to the Southern Pacific.
By 1930, the Red River Lumber Company railroad handled the logs and their herald appeared on 25's tender. After several more years, the RRLC sold the 25 to Modesto & Empire Traction as their 7. M&ET operated the 7 until the early 1950s before scrapping it in April 1952.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 25 |
Locobase ID | 15222 |
Railroad | Lassen Lumber & Box |
Country | USA |
Whyte | 2-6-2 |
Number in Class | 1 |
Road Numbers | 25 |
Gauge | Std |
Number Built | 1 |
Builder | Baldwin |
Year | 1923 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 9 / 2.74 |
Engine Wheelbase (ft / m) | 24.50 / 7.47 |
Ratio of driving wheelbase to overall engine wheelbase | 0.37 |
Overall Wheelbase (engine & tender) (ft / m) | 48.42 / 14.76 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 80,000 / 36,287 |
Engine Weight (lbs / kg) | 101,000 / 45,813 |
Tender Loaded Weight (lbs / kg) | 89,000 / 40,370 |
Total Engine and Tender Weight (lbs / kg) | 190,000 / 86,183 |
Tender Water Capacity (gals / ML) | 5000 / 18.94 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1800 / 6813 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 46 / 1168 |
Boiler Pressure (psi / kPa) | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
Tractive Effort (lbs / kg) | 20,435 / 9269.17 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.91 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 218 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 12.75 / 3.89 |
Firebox Area (sq ft / m2) | 83 / 7.71 |
Grate Area (sq ft / m2) | 16.20 / 1.51 |
Evaporative Heating Surface (sq ft / m2) | 1529 / 142.10 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1529 / 142.10 |
Evaporative Heating Surface/Cylinder Volume | 273.52 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2916 |
Same as above plus superheater percentage | 2916 |
Same as above but substitute firebox area for grate area | 14,940 |
Power L1 | 4799 |
Power MT | 396.75 |