Laurel & Tullahoma Western 2-4-0 "Porter" Locomotives in 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.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID12731
RailroadLaurel & Tullahoma Western
Number in Class1
Road Numbers61
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.50 / 1.98
Engine Wheelbase (ft / m)14 / 4.27
Ratio of driving wheelbase to overall engine wheelbase 0.46
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)49,000 / 22,226
Engine Weight (lbs / kg)60,000 / 27,216
Tender Loaded Weight (lbs / kg)40,000 / 18,144
Total Engine and Tender Weight (lbs / kg)100,000 / 45,360
Tender Water Capacity (gals / ML)2000 / 7.58
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)14" x 20" / 356x508
Tractive Effort (lbs / kg)11,590 / 5257.14
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.23
Heating Ability
Tubes (number - dia) (in / mm)170 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)8 / 2.44
Firebox Area (sq ft / m2)90.50 / 8.41
Grate Area (sq ft / m2)16.30 / 1.51
Evaporative Heating Surface (sq ft / m2)795 / 73.88
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)795 / 73.88
Evaporative Heating Surface/Cylinder Volume223.31
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 L14299
Power MT386.84

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Wes Barris