Central Cambalache 2-4-0 "Porter" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Las Claras (Locobase 13482)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 32, p. 272. Works number was 32940 in August 1908.

Locobase 13014 shows a small tank on the 2 1/2-foot gauge delivered to this Puerto Rican sugar-processor in 1904 by Ernst Wiener. Four years later, Baldwin supplied this little six-wheeler.

Specifications by Steve Llanso of Sweat House Media
ClassLas Claras
Locobase ID13,482
RailroadCentral Cambalache
Number in Class1
Road Numbers3
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 5.50
Engine Wheelbase (ft)11.17
Ratio of driving wheelbase to overall engine wheebase 0.49
Overall Wheelbase (engine & tender) (ft)26.21
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)23,400
Engine Weight (lbs)27,100
Tender Loaded Weight (lbs)15,000
Total Engine and Tender Weight (lbs)42,100
Tender Water Capacity (gals)600
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)20
Geometry Relating to Tractive Effort
Driver Diameter (in)33
Boiler Pressure (psi)160
High Pressure Cylinders (dia x stroke) (in)9" x 14"
Tractive Effort (lbs)4673
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.01
Heating Ability
Firebox Area (sq ft)35.80
Grate Area (sq ft) 8.10
Evaporative Heating Surface (sq ft)219
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)219
Evaporative Heating Surface/Cylinder Volume212.45
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1296
Same as above plus superheater percentage1296
Same as above but substitute firebox area for grate area5728
Power L13398
Power MT640.28

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