Data from DeGolyer, Volume 65, pp. 92+. Works number was 55248 in January 1922.
Dolbeer and Carlon's lumber company had bought a saturated-boiler logging Prairie from Baldwin after the 1905 Lewis & Clark Exposition (Locobase 12972). Their next purchase from Eddystone came seventeen years later and featured adequate superheating, 9 1/2" (241 mm) piston valves, and oil fuel.
The 3 worked for the Redwood Empire logger over its 20.9 miles (33.6 km) of 56 lb/yard (28 kg/metre) rail until the early 1950s when it was sold to Pacific Lumber of Scotia, Calif. PLC soon sold it the Stockton Terminal & Eastern in 1952.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 27, p. 249 Works number was 25503 in April 1905.
Originally built and lettered for the Lewis & Clark Centennial Exposition held in Portland in 1905, the wood-burning 2 was ticketed for Dolbeer & Carson's road from the start. It was a typical logging Prairie that differed from McCloud's 1901 engine (Locobase 12488) only in boiler pressure.
The HN ran from North Spit on Humboldt Bay to Fieldbrook. In 1936, the 2 went to Oregon's Hammond Lumber where it worked until 1950.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 3 | Sequoia |
| Locobase ID | 14940 | 12792 |
| Railroad | Humboldt Northern | Humboldt Northern |
| Country | USA | USA |
| Whyte | 2-6-2 | 2-6-2 |
| Number in Class | 1 | 1 |
| Road Numbers | 3 | 2 |
| Gauge | Std | Std |
| Number Built | 1 | 1 |
| Builder | Baldwin | Burnham, Williams & Co |
| Year | 1922 | 1905 |
| Valve Gear | Walschaert | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 9.50 / 2.90 | 7.67 / 2.34 |
| Engine Wheelbase (ft / m) | 24.83 / 7.57 | 23.83 / 7.26 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.38 | 0.32 |
| Overall Wheelbase (engine & tender) (ft / m) | 46.83 / 14.27 | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 96,500 / 43,772 | 82,000 / 37,195 |
| Engine Weight (lbs / kg) | 124,000 / 56,246 | 107,000 / 48,534 |
| Tender Loaded Weight (lbs / kg) | 75,700 / 34,337 | |
| Total Engine and Tender Weight (lbs / kg) | 199,700 / 90,583 | |
| Tender Water Capacity (gals / ML) | 3500 / 13.26 | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1500 / 5678 | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 | 46 / 23 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 44 / 1118 | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 175 / 1210 | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 23,448 / 10635.85 | 21,364 / 9690.56 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.12 | 3.84 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 142 - 2" / 51 | 240 - 2" / 51 |
| Flues (number - dia) (in / mm) | 22 - 5.375" / 137 | |
| Flue/Tube length (ft / m) | 12 / 3.66 | 11.54 / 3.52 |
| Firebox Area (sq ft / m2) | 104 / 9.66 | 122.70 / 11.40 |
| Grate Area (sq ft / m2) | 21 / 1.95 | 16 / 1.49 |
| Evaporative Heating Surface (sq ft / m2) | 1342 / 124.72 | 1562 / 145.17 |
| Superheating Surface (sq ft / m2) | 292 / 27.14 | |
| Combined Heating Surface (sq ft / m2) | 1634 / 151.86 | 1562 / 145.17 |
| Evaporative Heating Surface/Cylinder Volume | 212.68 | 279.43 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 3675 | 2880 |
| Same as above plus superheater percentage | 4337 | 2880 |
| Same as above but substitute firebox area for grate area | 21,476 | 22,086 |
| Power L1 | 9132 | 5137 |
| Power MT | 625.88 | 414.33 |