Simpson Logging 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Koo-Ley-Cui-Tan (Locobase 12481)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 23, p. 235. Works numbers 18718 in March 1901.

Logging in Mason and Grays Harbor counties on Washington's Olympic Peninsula imposed some severe demands on locomotives and these are reflected in the specifications. Curves of up to 20-deg radius, grades of 7% (yes, 370 feet to the mile). That latter incline was to be scaled by this locomotive pulling one loaded car of 30 tons on the log track at 20 mph. Or it could push logs between the rails, for which the specs required Baldwin to "provide means for wetting slide log way, between tracks." The tender was sized to allow 2,100 gallons for the boiler - enough for a 12-mile round trip.

Locobase hasn't been able to establish the meaning of the locomotive's name, which accompanied it when it joined the Phoenix Logging family in 1907.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12481
RailroadSimpson Logging
Number in Class1
Road Numbers
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase13.50'
Engine Wheelbase21.67'
Ratio of driving wheelbase to overall engine wheebase 0.62
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers119000 lbs
Engine Weight133000 lbs
Tender Light Weight56000 lbs
Total Engine and Tender Weight189000 lbs
Tender Water Capacity2800 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)50 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter50"
Boiler Pressure160 psi
Cylinders (dia x stroke)20" x 24"
Tractive Effort26112 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.56
Heating Ability
Firebox Area166 sq. ft
Grate Area33.50 sq. ft
Evaporative Heating Surface1910 sq. ft
Superheating Surface
Combined Heating Surface1910 sq. ft
Evaporative Heating Surface/Cylinder Volume218.87
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5360
Same as above plus superheater percentage5360
Same as above but substitute firebox area for grate area26560
Power L14186
Power MT310.20

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