A L Clark Lumber Company 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 11727)

Data from Negative 4827, Southern Methodist University, Central University Libraries, DeGolyer Library collection of digitized Baldwin images, retrieved 26 October 2010 from http://digitalcollections.smu.edu/cdm4/item_viewer.php . Works number was 41016 in December 1913.

Another of a widely distributed set of Baldwin logging Prairies. A L Clark operated the 3 for a while near Glenwood, Ark, then sold it to White Grandin Lumber Company of Grandin, Mo..

Specifications by Steve Llanso of Sweat House Media
Locobase ID11727
RailroadA L Clark Lumber Company
Number in Class1
Road Numbers3
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase10'
Engine Wheelbase25.25'
Ratio of driving wheelbase to overall engine wheebase 0.40
Overall Wheelbase (engine & tender)46.83'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers77000 lbs
Engine Weight101000 lbs
Tender Light Weight69000 lbs
Total Engine and Tender Weight170000 lbs
Tender Water Capacity3500 gals
Tender Fuel Capacity (oil/coal)6 tons
Minimum weight of rail (calculated)43 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter44"
Boiler Pressure170 psi
Cylinders (dia x stroke)16" x 24"
Tractive Effort20177 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.82
Heating Ability
Firebox Area88 sq. ft
Grate Area14.40 sq. ft
Evaporative Heating Surface1603 sq. ft
Superheating Surface
Combined Heating Surface1603 sq. ft
Evaporative Heating Surface/Cylinder Volume287.02
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2448
Same as above plus superheater percentage2448
Same as above but substitute firebox area for grate area14960
Power L14560
Power MT391.68

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