Ozark Lumber Company 4-6-0 "Ten-wheeler" Locomotives of 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.

Specifications 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 Wheelbase10.67'
Engine Wheelbase19.67'
Ratio of driving wheelbase to overall engine wheebase 0.54
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers45340 lbs
Engine Weight58590 lbs
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity1800 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)25 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter45"
Boiler Pressure130 psi
Cylinders (dia x stroke)14" x 20"
Tractive Effort9626 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.71
Heating Ability
Firebox Area71 sq. ft
Grate Area12.40 sq. ft
Evaporative Heating Surface710 sq. ft
Superheating Surface
Combined Heating Surface710 sq. ft
Evaporative Heating Surface/Cylinder Volume199.25
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 L12914
Power MT425.07

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