A small Mikado tank traveled over this peninsular logging railway on 40-45 lb/yard (20-22.5 kg/metre) rail up 4 and 5% grades, and curves "not over" 25 degrees (radii of 231 feet/70.4 metres).
The 2 would later work on the Weyerhaeuser Timber Company.
Siler Logging Company's operation was based at Ames Lake near the town of Carnation, Wash. It was a joint venture between Weyerhaeuser and Port Blakely Mill Company. Open between 1923 and 1931 and supplied timber for railroad grade crossings.
A medium-sized, oil-burning logging Mikado arrived in 1924 to roll on the 25 miles (40.3 km) of 50 lb/yard (25 kg/metre) rail that scaled grades as steep as 3 1/2% and ran around curves as tight as 20 degree (radii of 288 feet/87.8 metres). (Some of the track weighed 45 lb/yard, 22.5 kg/metre.) The route headed roughly due north from Ames Lake to Bromart, which lay just north of Snohomish.
Its piston valves measured 10" (254 mm).
In the early 1930s, the SLC sold out to Weyerhaueser, which renumbered the 3 as their #102.
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Railroad||Simpson Logging Company||Siler Logging Company|
|Number in Class||1||1|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||11.50 / 3.51||12.08 / 3.68|
|Engine Wheelbase (ft / m)||25.75 / 7.85||28.50 / 8.69|
|Ratio of driving wheelbase to overall engine wheebase||0.45||0.42|
|Overall Wheelbase (engine & tender) (ft / m)||5 / 1.52||50.35 / 15.35|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||95,500 / 43,318||120,000 / 54,431|
|Engine Weight (lbs / kg)||124,500 / 56,472||150,000 / 68,039|
|Tender Loaded Weight (lbs / kg)||77,500 / 35,153|
|Total Engine and Tender Weight (lbs / kg)||124,500||227,500 / 103,192|
|Tender Water Capacity (gals / ML)||1700 / 6.44||3500 / 13.26|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||650 / 2.50||1700 / 6.40|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||40 / 20||50 / 25|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||41 / 1041||44 / 1118|
|Boiler Pressure (psi / kPa)||180 / 12.40||180 / 12.40|
|High Pressure Cylinders (dia x stroke) (in / mm)||16" x 22" / 406x559||19" x 24" / 483x610|
|Tractive Effort (lbs / kg)||21,017 / 9533.16||30,127 / 13665.39|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.54||3.98|
|Firebox Area (sq ft / m2)||78 / 7.25||158 / 14.68|
|Grate Area (sq ft / m2)||17.70 / 1.64||29 / 2.69|
|Evaporative Heating Surface (sq ft / m2)||1018 / 94.57||1700 / 157.93|
|Superheating Surface (sq ft / m2)||356 / 33.07|
|Combined Heating Surface (sq ft / m2)||1018 / 94.57||2056 / 191|
|Evaporative Heating Surface/Cylinder Volume||198.84||215.85|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||3186||5220|
|Same as above plus superheater percentage||3186||6107|
|Same as above but substitute firebox area for grate area||14,040||33,275|