Pacific Lumber Company / Paine Lumber Company 2-6-2 "Prairie" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 29 (Locobase 13612)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 34, p. 293. (Thanks to Chris Hohl for his 25 January 2015 asking about the wood-fuel capacity.) Works number was 34484 in April 1910.

Following a year after the Selwyn Eddy, this unamed TPL stablemate had a bigger boiler and commensurately enlarged (but still small) wood-burning grate and firebox. These generated the steam for cylinders with 2" greater diameters. The tender held 3 cords of wood fuel.

After decades in service, the 29 was retired in 1961 not long after a major overhaul. Almost 25 years later, the TPL donated the 29 to the Northern Counties Logging Interpretive Association (NCLIA) in 1986. Its relatively short time of operation after the major overhaul and its storage for decades in a shed encouraged the NCLIA to consider rebuilding the engine.


Class 3 (Locobase 13031)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 25, p. 259. See also http://www.wisconsinhistory.org/hp/register/viewSummary.asp?refnum=86001392 for information on the Paine Lumber Company Historic District in Oshkosh. Works number was 29627 in November 1906.

Edward L Paine began logging in Wisconsin in 1853 and his sons would carry the business into the 20th Century as a major timber supplier based in Oshkosh. In the mid-1920s the company was still prosperous to erect workers' housing and an accompanying Paine Thrift Bank, which functioned something like a credit union.

This Prairie only operated for Paine for about 15 years before being sold to Langlade Lumber in 1919.


Class 30 (Locobase 13613)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 36, p. 153. Works number was 36173 in March 1911.

This was a smaller Prairie than the two that preceded it on the TPL, but it featured a change to oil fuel and a higher-pressure boiler.

Like the others, the 30 served for decades before being scrapped in 1955.


Class Selwyn Eddy (Locobase 13611)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 48, p. 289. See also "Baldwin Logging Locomotive Being Built for the Pacific Lumber Co., Scotia, Cal.", The Timberman, Volume 11 (November 1909), p. 49. Works number was 33339 in April 1909.

The Timberman article goes into considerable detail about what made this Prairie so suitable for logging operations. The 2-6-2 layout, combined with the equalizing setup, ensured "...a steady riding locomotive which is easy on both rails and flanges when traversing curves." Having already noted that the PCL's routes included 6% grades and 35-degree curves, the report comments on the boiler's qualities: "High steaming capacity is essential to successful work on heavy grades." Their characterization of the firebox as possessing "ample volume" may be overstating the case, but the report highlights the longer tubes. [Not mentioned but of undoubted value must have been the high factor of adhesion.] And the Radley & Hunter wide-mouthed stack is eminently suited to arresting sparks from the wood-burning firebox.

The locomotive's namesake, Selwyn Eddy, was one of the founders of the PCL, a company that exploited the Redwood Empire's great expanse of tall trees. The 27 operated for the TPL until its scrapping in 1955.

Specifications by Steve Llanso of Sweat House Media
Class29330Selwyn Eddy
Locobase ID13612 13031 13613 13611
RailroadPacific Lumber CompanyPaine Lumber CompanyPacific Lumber CompanyPacific Lumber Company
CountryUSAUSAUSAUSA
Whyte2-6-22-6-22-6-22-6-2
Number in Class1111
Road Numbers2933027
GaugeStdStdStdStd
Number Built1111
BuilderBaldwinBurnham, Williams & CoBaldwinBurnham, Williams & Co
Year1910190619111909
Valve GearStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase10'8' 8.33'10'
Engine Wheelbase25.92'24.42'23.83'25.92'
Ratio of driving wheelbase to overall engine wheebase 0.39 0.33 0.35 0.39
Overall Wheelbase (engine & tender)47.92'46.37'47.92'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers90000 lbs76000 lbs90000 lbs81750 lbs
Engine Weight120000 lbs100000 lbs120000 lbs110900 lbs
Tender Light Weight60000 lbs70000 lbs60000 lbs
Total Engine and Tender Weight180000 lbs190000 lbs170900 lbs
Tender Water Capacity3500 gals3000 gals3000 gals3000 gals
Tender Fuel Capacity (oil/coal)1000 gals gals
Minimum weight of rail (calculated)50 lb/yard42 lb/yard50 lb/yard45 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter52"46"46"52"
Boiler Pressure160 psi160 psi180 psi180 psi
Cylinders (dia x stroke)18" x 24"16" x 24"17" x 24"16" x 24"
Tractive Effort20337 lbs18165 lbs23070 lbs18078 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.43 4.18 3.90 4.52
Heating Ability
Firebox Area127.70 sq. ft107 sq. ft116 sq. ft114.60 sq. ft
Grate Area17.40 sq. ft16 sq. ft16 sq. ft16 sq. ft
Evaporative Heating Surface1765 sq. ft1410 sq. ft1556 sq. ft1578 sq. ft
Superheating Surface
Combined Heating Surface1765 sq. ft1410 sq. ft1556 sq. ft1578 sq. ft
Evaporative Heating Surface/Cylinder Volume249.70252.46246.79282.54
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2784256028802880
Same as above plus superheater percentage2784256028802880
Same as above but substitute firebox area for grate area20432171202088020628
Power L14715427246756008
Power MT346.49371.77343.55486.07


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