Central Roig 0-4-2 Locomotives in USA-Puerto_Rico

Class Details by Steve Llanso of Sweat House Media

Class Valdes (Locobase 14757)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 63, pp. 251+. See also a photo tour of the closed works: Gloria Merryman "June 1st, 2010 Central Roig, Historic Sugar Cane Plantation and Mill, Yabucoa, Puerto Rico, El Yunque, Rain Forest" at [] . Works numbers were 54242 in January 1921 and 60565 in July 1928.

This sugar processing central in southeastern Puerto Rico was owned by Yabucoa Sugar Company. They bought these very small saddle tanks. The 9 was delivered with a Rushton Improved spark-arresting abbage stack.

Gloria Merryman notes that this was the last sugar mill to operate in Puerto Rico (it closed in 2000) and was the largest in this particular valley. Her grandfather worked for CR and her father grew up at the mill. She adds:"During harvest it felt like it was snowing except that the flakes were black and the weather was warm."

"I remember him bringing me sugar cane. It was such a treat to chew on the cane and, oh, so sweet."

The Central Roig sold the 8 to Sterling Coal Company, where it could still be seen in operation in 1946.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID14757
RailroadCentral Roig
CountryUSA-Puerto Rico
Number in Class2
Road Numbers8-9
Gauge66 cm
Number Built2
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 3.67 / 1.12
Engine Wheelbase (ft / m) 8.50 / 2.59
Ratio of driving wheelbase to overall engine wheelbase 0.43
Overall Wheelbase (engine & tender) (ft / m) 8.50 / 2.59
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)16,000 / 7257
Engine Weight (lbs / kg)20,500 / 9299
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)20,500
Tender Water Capacity (gals / ML)300 / 1.14
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.45 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)13 / 6.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)24 / 610
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)7" x 12" / 178x305
Tractive Effort (lbs / kg)3332 / 1511.37
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.80
Heating Ability
Tubes (number - dia) (in / mm)46 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 6.26 / 1.91
Firebox Area (sq ft / m2)19 / 1.77
Grate Area (sq ft / m2) 4.50 / 0.42
Evaporative Heating Surface (sq ft / m2)131 / 12.17
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)131 / 12.17
Evaporative Heating Surface/Cylinder Volume247.17
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation720
Same as above plus superheater percentage720
Same as above but substitute firebox area for grate area3040
Power L12729
Power MT752.05

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