Laurel & Tullahoma Western 2-4-0 "Porter" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 61 (Locobase 12731)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 27, p. 164. See the essay "SouthBear's History of Laurel, Mississippi - Chapter 3:Industrialization and the Founding of the City of Laurel, archived on . Works number was 24904 in December 1904.

Use of a Six-wheeler arrangement in North America usually indicated a logging setting and Eastman Gardiner's timber holdings in southeastern Mississippi certainly had use for a short-coupled wood-burner on its L & TW line. Silas Gardiner, his son George Gardiner, and George's cousin Charles Eastman were northern lumbermen from Clinton Iowa who chanced to hear of the virgin pine in Jones County while riding on a train and soon negotiated the sale of 16,000 acres for $4/acre. Laurel, Mississippi, already named but not built, soon grew in response and became known as a Southern city built with Yankee money.

Their railroad covered the 35 miles from Laurel to Raleigh, Miss.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,731
RailroadLaurel & Tullahoma Western
Number in Class1
Road Numbers61
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 6.50
Engine Wheelbase (ft)14
Ratio of driving wheelbase to overall engine wheebase 0.46
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)49,000
Engine Weight (lbs)60,000
Tender Loaded Weight (lbs)40,000
Total Engine and Tender Weight (lbs)100,000
Tender Water Capacity (gals)2000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)41
Geometry Relating to Tractive Effort
Driver Diameter (in)46
Boiler Pressure (psi)160
High Pressure Cylinders (dia x stroke) (in)14" x 20"
Tractive Effort (lbs)11,590
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.23
Heating Ability
Firebox Area (sq ft)90.50
Grate Area (sq ft)16.30
Evaporative Heating Surface (sq ft)795
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)795
Evaporative Heating Surface/Cylinder Volume223.10
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2608
Same as above plus superheater percentage2608
Same as above but substitute firebox area for grate area14,480
Power L14294
Power MT386.39

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