Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 28, p. 229 and Vol 29, p. 288. Works numbers were 27312 in January 1906 and 30606 in April 1907.
Simpson Logging operated the Peninsular Railway, which eventually ran over 50 miles (80 km) of track up into Chehalis County (now Grays Harbor County).
In February 1936, broker Kern & Kibbee sold the 6 to Guy F Atkinson, a California contractor. The 7, which bore the name "Sol Simpson" when it was delivered was sold in April 1917 to the Alaska Railroad as their 21.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 6 |
| Locobase ID | 12914 |
| Railroad | Peninsular |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 2 |
| Road Numbers | 6-7 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1906 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 24.42 / 7.44 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.33 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 73,000 / 33,112 |
| Engine Weight (lbs / kg) | 98,000 / 44,452 |
| Tender Loaded Weight (lbs / kg) | 55,000 / 24,948 |
| Total Engine and Tender Weight (lbs / kg) | 153,000 / 69,400 |
| Tender Water Capacity (gals / ML) | 2500 / 9.47 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 41 / 20.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 46 / 1168 |
| Boiler Pressure (psi / kPa) | 160 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 18,165 / 8239.52 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.02 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 211 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.87 / 3.62 |
| Firebox Area (sq ft / m2) | 107 / 9.94 |
| Grate Area (sq ft / m2) | 16 / 1.49 |
| Evaporative Heating Surface (sq ft / m2) | 1410 / 131.04 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1410 / 131.04 |
| Evaporative Heating Surface/Cylinder Volume | 252.24 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2560 |
| Same as above plus superheater percentage | 2560 |
| Same as above but substitute firebox area for grate area | 17,120 |
| Power L1 | 4268 |
| Power MT | 386.68 |