Poitevent & Favre Company 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 14145)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 48, p. 249. Works number was 40732 in October 1913.

As the P & F set up its new sawmill in Mandeville, La, it bought some new locomotives. Two of them were the double-ended four-coupleds shown in Locobase 14302. The 3, which was ordered between the two smaller engines, weighed almost twice as much and clearly was the major motive power on the logging road.

Like the others, the 3 lost its home in 1924 and wound up on the Hammond Lumber Company of Oak View, Wash.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14145
RailroadPoitevent & Favre Company
Number in Class1
Road Numbers3
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase10.25'
Engine Wheelbase26.83'
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender)48.43'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers93600 lbs
Engine Weight120500 lbs
Tender Light Weight80000 lbs
Total Engine and Tender Weight200500 lbs
Tender Water Capacity4000 gals
Tender Fuel Capacity (oil/coal)10 tons
Minimum weight of rail (calculated)52 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter50"
Boiler Pressure180 psi
Cylinders (dia x stroke)18" x 24"
Tractive Effort23795 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.93
Heating Ability
Firebox Area124 sq. ft
Grate Area18.20 sq. ft
Evaporative Heating Surface1555 sq. ft
Superheating Surface
Combined Heating Surface1555 sq. ft
Evaporative Heating Surface/Cylinder Volume219.99
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3276
Same as above plus superheater percentage3276
Same as above but substitute firebox area for grate area22320
Power L14615
Power MT326.10

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