Texas Long Leaf Lumber 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 14286)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 52, p. 305. See also "'Sabine' (Gulf Coast Lumberman article on Texas Long Leaf Lumber Company at Trinity, 1937)", archived at [] and Sidney Connell, "TRINITY, TX (TRINITY COUNTY)," Handbook of Texas Online (http://www.tshaonline.org/handbook/online/articles/hjt10), accessed July 12, 2012. Published by the Texas State Historical Association.. Works number was 41475 in June 1914.

Locobase is a little confused by the Texas Handbook entry and the Gulf Coast Lumberman article cited above. In both, the name Texas Long Leaf Lumber is said to have been given to the former Rock Creek Lumber Company in 1922 in recognition of the diminishing stands of long leaf pine in the Trinity, Texas vicinity. Yet, Baldwin's 1914 spec sheet clearly attributes the sale to Texas Long Leaf.

At any rate, another 1937 article on the Sabine combine's second big mill at New Willard, Tex, indicated that there had been a lot more timber there than they thought in 1922:"New Willard and Trinity are cutting away at opposite ends of what was once one of the greatest forested areas in Texas, and which still holds enough fine pine timber to keep both these mills running for many years to come. Hundreds of private property owners all over this territory who have pine standing on their lands, cut it and bring it to New Willard for sale. This supply is growing steadily. Augmenting their own virgin forests this timber supply stretches far into the future, even for so big a mill as that at New Willard, which cuts about four and one-half million feet of pine monthly."

Locobase doesn't know where the 7 operated, but it was a classic logging Prairie that apparently did not work for any other company before it was retired.

Texas Long Leaf Lumber was bought by Southland Corporation in 1940.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14286
RailroadTexas Long Leaf Lumber
Number in Class1
Road Numbers7
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.17 / 2.80
Engine Wheelbase (ft / m)23.75 / 7.24
Ratio of driving wheelbase to overall engine wheelbase 0.39
Overall Wheelbase (engine & tender) (ft / m)45 / 13.72
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)70,000 / 31,752
Engine Weight (lbs / kg)88,000 / 39,916
Tender Loaded Weight (lbs / kg)60,000 / 27,216
Total Engine and Tender Weight (lbs / kg)148,000 / 67,132
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)6 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41 / 1041
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x508
Tractive Effort (lbs / kg)16,793 / 7617.19
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.17
Heating Ability
Tubes (number - dia) (in / mm)146 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.87 / 3.62
Firebox Area (sq ft / m2)97 / 9.01
Grate Area (sq ft / m2)14 / 1.30
Evaporative Heating Surface (sq ft / m2)999 / 92.81
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)999 / 92.81
Evaporative Heating Surface/Cylinder Volume244.25
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2520
Same as above plus superheater percentage2520
Same as above but substitute firebox area for grate area17,460
Power L14463
Power MT421.68

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