Ozark Lumber Company 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 11593)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 15, p. 37. Works number was 9888 in March 1889.

Obviously, this Ten-wheeler was designed for very lighly ballasted rail indeed, even it it was laid on the standard gauge. The engine was later sold to the Wyatt Lumber Company.

NB: The evaporative and direct heating surfaces are an estimate derived from the dimensions of the Carolina Timber Ten-wheeler described in 12992. The firebox dimensions were identical except for 1/2" height differences in front and rear.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID11593
RailroadOzark Lumber Company
Number in Class1
Road Numbers2
Number Built1
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.67 / 3.25
Engine Wheelbase (ft / m)19.67 / 6
Ratio of driving wheelbase to overall engine wheelbase 0.54
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)45,340 / 20,566
Engine Weight (lbs / kg)58,590 / 26,576
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)25 / 12.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)45 / 1143
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)14" x 20" / 356x508
Tractive Effort (lbs / kg)9626 / 4366.29
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.71
Heating Ability
Tubes (number - dia) (in / mm)119 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.32 / 3.15
Firebox Area (sq ft / m2)71 / 6.60
Grate Area (sq ft / m2)12.40 / 1.15
Evaporative Heating Surface (sq ft / m2)710 / 65.99
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)710 / 65.99
Evaporative Heating Surface/Cylinder Volume199.44
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1612
Same as above plus superheater percentage1612
Same as above but substitute firebox area for grate area9230
Power L12917
Power MT425.51

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