Seattle Southeastern 2-6-2 "Prairie" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 5 (Locobase 13040)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 29, p. 285 . Works number was 30659 in April 1907.

This Kangley, Wash logging railroad was operated by Pacific States Lumber until it was abandoned in 1914. At that point, PSL put its #5 Prairie saddle tank to work on the Cascade Lumber road.

Principal Dimensions by Steve Llanso of Sweat House Media
Class5
Locobase ID13,040
RailroadSeattle Southeastern
CountryUSA
Whyte2-6-2ST
Number in Class1
Road Numbers5
GaugeStd
Number Built1
BuilderBurnham, Williams & Co
Year1907
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.05
Engine Wheelbase (ft / m)25.75 / 7.85
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender) (ft / m)25.75 / 7.85
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)85,000 / 38,555
Engine Weight (lbs / kg)114,000 / 51,710
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)114,000
Tender Water Capacity (gals / ML)1600 / 6.06
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)47 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)21,364 / 9690.56
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.98
Heating Ability
Firebox Area (sq ft / m2)90 / 8.36
Grate Area (sq ft / m2)14.40 / 1.34
Evaporative Heating Surface (sq ft / m2)1161 / 107.90
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1161 / 107.90
Evaporative Heating Surface/Cylinder Volume207.88
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2592
Same as above plus superheater percentage2592
Same as above but substitute firebox area for grate area16,200
Power L13808
Power MT296.30

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