Polson Logging 2-8-0 "Consolidation" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 99 (Locobase 12762)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 27, p. 214. Works number was 25416 in March 1905.

Wood-burning Consolidation of average size for a light-rail, standard gauge operation like a lumber company. Polson Logging was based in Hoquiam, Washington State and operated the 99 until 1948, when another big timber company, Rayonier Corp took over the company.

RC scrapped the 99 in 1959.

Principal Dimensions by Steve Llanso of Sweat House Media
Class99
Locobase ID12,762
RailroadPolson Logging
CountryUSA
Whyte2-8-0
Number in Class1
Road Numbers99
GaugeStd
Number Built1
BuilderBurnham, Williams & Co
Year1905
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.27
Engine Wheelbase (ft / m)21.50 / 6.55
Ratio of driving wheelbase to overall engine wheebase 0.65
Overall Wheelbase (engine & tender) (ft / m)46.58 / 14.20
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)120,000 / 54,431
Engine Weight (lbs / kg)137,000 / 62,142
Tender Loaded Weight (lbs / kg)80,000 / 36,287
Total Engine and Tender Weight (lbs / kg)217,000 / 98,429
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)50 / 25
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)20" x 24" / 508x610
Tractive Effort (lbs / kg)29,376 / 13324.75
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Firebox Area (sq ft / m2)141 / 13.10
Grate Area (sq ft / m2)29.80 / 2.77
Evaporative Heating Surface (sq ft / m2)1688 / 156.88
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1688 / 156.88
Evaporative Heating Surface/Cylinder Volume193.43
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5364
Same as above plus superheater percentage5364
Same as above but substitute firebox area for grate area25,380
Power L14113
Power MT302.25

All material Copyright © SteamLocomotive.com
Wes Barris