Data from "Logging Locomotives", Record of Recent Construction #96 (Baldwin Locomotive Works, 1918), p. 34-35; and DeGolyer, Volume 52, p.383. See also "Northern Counties Logging Interpretive Association", located at [] and Ralph Hidy, "Lumbermen in Idaho" at [
]; and Billie Jean Plaster, "Timber Town", reprinted from Sandpoint Magazine and archived at [
] . (Thanks to Steve Low for his 28 May 2017 email noting an error in the 4's road number.) Works number was 43563 in June 1916.
Principal Dimensions by Steve Llanso of Sweat House Media | |
---|---|
Class | 4 |
Locobase ID | 11017 |
Railroad | Humbird Lumber Company |
Country | USA |
Whyte | 2-8-2 |
Number in Class | 1 |
Road Numbers | 4/15 |
Gauge | Std |
Number Built | 1 |
Builder | Baldwin |
Year | 1916 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 13.08 / 3.99 |
Engine Wheelbase (ft / m) | 27.08 / 8.25 |
Ratio of driving wheelbase to overall engine wheelbase | 0.48 |
Overall Wheelbase (engine & tender) (ft / m) | 55.37 / 16.88 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 138,300 / 62,732 |
Engine Weight (lbs / kg) | 177,400 / 80,467 |
Tender Loaded Weight (lbs / kg) | 92,600 / 42,003 |
Total Engine and Tender Weight (lbs / kg) | 270,000 / 122,470 |
Tender Water Capacity (gals / ML) | 4500 / 17.05 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8 / 7 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 58 / 29 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 48 / 1219 |
Boiler Pressure (psi / kPa) | 160 / 11 |
High Pressure Cylinders (dia x stroke) (in / mm) | 20.5" x 28" / 521x711 |
Tractive Effort (lbs / kg) | 33,340 / 15122.79 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.15 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 199 - 2" / 51 |
Flues (number - dia) (in / mm) | 28 - 5.375" / 137 |
Flue/Tube length (ft / m) | 16.25 / 4.95 |
Firebox Area (sq ft / m2) | 178 / 16.54 |
Grate Area (sq ft / m2) | 41.30 / 3.84 |
Evaporative Heating Surface (sq ft / m2) | 2500 / 232.34 |
Superheating Surface (sq ft / m2) | 553 / 51.39 |
Combined Heating Surface (sq ft / m2) | 3053 / 283.73 |
Evaporative Heating Surface/Cylinder Volume | 233.64 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 6608 |
Same as above plus superheater percentage | 7797 |
Same as above but substitute firebox area for grate area | 33,606 |
Power L1 | 10,009 |
Power MT | 638.21 |