Data from "Logging Locomotives", Record of Recent Construction #96 (Baldwin Locomotive Works, 1918), p. 27-28 and DeGolyer, Vol 52, pp. 368+. Works numbers were 44058 in September 1916 and 44276 in October 1916.
Tips that these were logging engines (other than the name of their owners) were the light axle loading for a Mikado together with specs that included 20-deg curves, 3% grades on the line and 6% on spurs, and rails of no more than 56 lb/yd (28 kg/metre) weight. The road was 8-10 miles (12.8-16.1 km) long and the company, said the specs, "wishes to handle 60 cars per day at a total of three trips, weight of cars loaded is 40 tons." (That is, each trailing load would total 800 tons.)
The design was a standard one. The first two locomotives apparently were scrapped by the SFLC, but the third engine was sold to Weyerhaeuser in 1922.
Data from DeGolyer, Vol 62, pp. 398+. Works number was 52235 in August 1919.
Typical, sizable, oil-burning logging Mikado that ran on 60 lb/yard (30 kg/metre) rail around 30 degree (radii of 193 feet/58.8 metre) curves. The crown sheet was "to be arranged for grades of 7%.)
The 5 didn't remain with was sold to Weyerhaeuser in 1922.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 1 | 5 |
| Locobase ID | 11014 | 14717 |
| Railroad | Snoqualmie Falls Lumber Company | Snoqualmie Falls Lumber Company |
| Country | USA | USA |
| Whyte | 2-8-2 | 2-8-2 |
| Number in Class | 2 | 1 |
| Road Numbers | 1-2 | 5 |
| Gauge | Std | Std |
| Number Built | 2 | 1 |
| Builder | Baldwin | Baldwin |
| Year | 1916 | 1919 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 12.08 / 3.68 | 12.08 / 3.68 |
| Engine Wheelbase (ft / m) | 27.25 / 8.31 | 28.25 / 8.61 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.44 | 0.43 |
| Overall Wheelbase (engine & tender) (ft / m) | 49.10 / 14.97 | 51.15 / 15.59 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 113,400 / 51,437 | 118,000 / 53,524 |
| Engine Weight (lbs / kg) | 140,800 / 63,866 | 149,000 / 67,585 |
| Tender Loaded Weight (lbs / kg) | 70,800 / 32,114 | 70,000 / 31,752 |
| Total Engine and Tender Weight (lbs / kg) | 211,600 / 95,980 | 219,000 / 99,337 |
| Tender Water Capacity (gals / ML) | 3500 / 13.26 | 3500 / 13.26 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1600 / 6056 | 1600 / 6056 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 47 / 23.50 | 49 / 24.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 44 / 1118 | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 180 / 1240 | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 24" / 457x610 | 19" x 24" / 483x610 |
| Tractive Effort (lbs / kg) | 27,039 / 12264.70 | 30,127 / 13665.39 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.19 | 3.92 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 291 - 2" / 51 | 332 - 2" / 51 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 13 / 3.96 | 13 / 3.96 |
| Firebox Area (sq ft / m2) | 140 / 13.01 | 156 / 14.49 |
| Grate Area (sq ft / m2) | 25.50 / 2.37 | 29 / 2.70 |
| Evaporative Heating Surface (sq ft / m2) | 2108 / 195.91 | 2401 / 223.14 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 2108 / 195.91 | 2401 / 223.14 |
| Evaporative Heating Surface/Cylinder Volume | 298.16 | 304.70 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 4590 | 5220 |
| Same as above plus superheater percentage | 4590 | 5220 |
| Same as above but substitute firebox area for grate area | 25,200 | 28,080 |
| Power L1 | 5243 | 5329 |
| Power MT | 407.72 | 398.25 |