Louisiana & Pacific 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 20 (Locobase 13073)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 30, p. 144 and Volume 32, p. 100. See also the TAP Lines case summary of the complicated nature of this railroad at http://www.ttarchive.com/Library/Articles/TapLineCase_Louisian&Pacific.html, last accessed 28 September 2011. Works numbers were 29668 in December 1906, 32221, 32286 in November 1907; 33356-33358 in April 1909.

A quint-partite assembly of logging roads in Louisiana all owned by the R A Long interests. Although none of the 5 short logging roads connected to each other, they all struck points on the Lake Charles & Northern Railway.

The L & P operated several of Baldwin's standard logging Prairies. Hudson River Lumber Company was credited as the buyer for the 20 and Calcasieu Long Leaf Lumber Company for the 70-71. Both of the latter later operated under the Longville Lumber name. Three additional locomotives were bought directly by the Long Bell Lumber Company.

46 later was sold to the King Ryder Lumber Company.

Class 99 (Locobase 13827)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 39, p. 68 and Vol 52, pp. 328. See also W T Black, "Early Sawmilling at Lake Charles," Louisiana at http://www.usgwarchives.net/la/calcasieu/block/lakecharles.htm . Works numbers were 37519 and 37616 in February 1912 and 41562 in July 1914.

The Baldwin spec says Longville Lumber ordered these relatively powerful logging Prairies. It's not clear from the record when the 99 was sold by sister company Long Bell Lumber, but it may have occurred when the L & P was closed. The engine wound up working for the Angelina County Lumber Company of Keltys, Texas.

47 was later renumbered for Long Bell Lumber as their 11.

The 69 originally operated on the branch serving the Calcasieu Long Leaf mills at Lake Charles, La. It then served several masters beginning with Rapides Gravel Co in Woodworth, La, then Mid State Materials Co. MSMC sold the engine to dealer George Silcott in 1968, who sold it in 1970. The locomotive then went international to end up in the hands of William Richmond of Strome, Alberta, Canada. It was last known to be in storage by Ronald Bergseth of Sedgewick, Alberta.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13073 13827
RailroadLouisiana & PacificLouisiana & Pacific
Number in Class61
Road Numbers20, 70-71, 46, 97-9899, 47, 69
Number Built61
BuilderBurnham, Williams & CoBaldwin
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase 9.17' 9.17'
Engine Wheelbase23.75'24.67'
Ratio of driving wheelbase to overall engine wheebase 0.39 0.37
Overall Wheelbase (engine & tender)44.65'48.21'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers61000 lbs82000 lbs
Engine Weight84000 lbs110000 lbs
Tender Light Weight60000 lbs60000 lbs
Total Engine and Tender Weight144000 lbs170000 lbs
Tender Water Capacity3000 gals3000 gals
Tender Fuel Capacity (oil/coal)6 tons
Minimum weight of rail (calculated)34 lb/yard46 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter46"46"
Boiler Pressure180 psi200 psi
Cylinders (dia x stroke)15" x 20"16" x 24"
Tractive Effort14967 lbs22706 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08 3.61
Heating Ability
Firebox Area82.20 sq. ft112 sq. ft
Grate Area14.13 sq. ft16 sq. ft
Evaporative Heating Surface991 sq. ft1594 sq. ft
Superheating Surface
Combined Heating Surface991 sq. ft1594 sq. ft
Evaporative Heating Surface/Cylinder Volume242.26285.40
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation25433200
Same as above plus superheater percentage25433200
Same as above but substitute firebox area for grate area1479622400
Power L147305914
Power MT512.85477.00

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