Seattle Southeastern 2-6-2 "Prairie" Locomotives of 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13,040
RailroadSeattle Southeastern
Number in Class1
Road Numbers5
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)10
Engine Wheelbase (ft)25.75
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender) (ft)25.75
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)85,000
Engine Weight (lbs)114,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)114,000
Tender Water Capacity (gals)1600
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)47
Geometry Relating to Tractive Effort
Driver Diameter (in)44
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)16" x 24"
Tractive Effort (lbs)21,364
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.98
Heating Ability
Firebox Area (sq ft)90
Grate Area (sq ft)14.40
Evaporative Heating Surface (sq ft)1161
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1161
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

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.