Marion County Lumber Company 2-6-0 "Mogul" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 11095)

Data from Logging Locomotives 1913 (Philadelphia, Pa: Baldwin Locomotive Works, 1913), p 11 and DeGolyer, Volume 30, p. 258. Works number was 31259 in July 1907.

Based in Marion, SC, this lumber company bought a large-capacity tender that carried 1 1/4 cords of wood. Thus the most dominant visible feature on the locomotive is an enormous Radley & Hunter spark-arresting balloon stack. The Baldwin specs stressed the need for such a stack at several points. The fuel was "'green blocks' right from company's mill [,] being from 12" to 48" in length." It rode in a tender fitted with a wood rack around its top, "arranged for carrying plenty of wood."

A hidden concomitant to most logging-engine orders appears in the Baldwin specs: "Springs to be extra heavy on acc[ount] of very rough track."

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID11095
RailroadMarion County Lumber Company
Number in Class1
Road Numbers3
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.17 / 3.40
Engine Wheelbase (ft / m)17.33 / 5.28
Ratio of driving wheelbase to overall engine wheelbase 0.64
Overall Wheelbase (engine & tender) (ft / m)37.04 / 11.29
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)39,000 / 17,690
Engine Weight (lbs / kg)48,000 / 21,772
Tender Loaded Weight (lbs / kg)42,000 / 19,051
Total Engine and Tender Weight (lbs / kg)90,000 / 40,823
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)22 / 11
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36 / 914
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)12" x 18" / 305x457
Tractive Effort (lbs / kg)9792 / 4441.58
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.98
Heating Ability
Tubes (number - dia) (in / mm)88 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 7.85 / 2.39
Firebox Area (sq ft / m2)62 / 5.76
Grate Area (sq ft / m2)14 / 1.30
Evaporative Heating Surface (sq ft / m2)420 / 39.03
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)420 / 39.03
Evaporative Heating Surface/Cylinder Volume177.97
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2240
Same as above plus superheater percentage2240
Same as above but substitute firebox area for grate area9920
Power L12969
Power MT503.50

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