Central Los Ca±os 0-4-2 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 13336)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 32, p.53. Works number was 33200 in February 1909.

Puerto-Rican sugar-plantation saddle tanker for the Guantanamo Sugar Company's 13 1/2-mile (21.7-km) narrow-gauge line. The specification requires the 1 to haul 12-15 short tons of "cars & lading" up a straight 1/2% grade with frictional resistance not to exceed 15 lb per ton (7.5 kg per tonne) and to control about twice as much train load heading downgrade.

Class 12 (Locobase 15421)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 79. p. 60. Works number was 60195 in September 1927.

Locobase 13336 shows the first of these really small saddle tanks. When the Puerto Rican sugar mill ordered a second locomotive eighteen years later, they went for slightly more of everything: cylinder volume, tubes for more heating surface, and a larger firebox. All this was available for a mere two short tons (1,814 kg). Like the earlier engine, the 12 was challenged by curves with radii as tight as 50 feet (16 metres).

Specifications by Steve Llanso of Sweat House Media
Locobase ID13,336 15,421
RailroadCentral Los Ca±osCentral Los Ca±os
Number in Class11
Road Numbers112
Gauge66 cm66 cm
Number Built11
BuilderBurnham, Williams & CoBaldwin
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 3.67 3.75
Engine Wheelbase (ft) 8.50 9.58
Ratio of driving wheelbase to overall engine wheebase 0.43 0.39
Overall Wheelbase (engine & tender) (ft) 8.50 9.58
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)17,00019,000
Engine Weight (lbs)21,00025,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)21,00025,000
Tender Water Capacity (gals)300350
Tender Fuel Capacity (oil/coal) (gals/tons) 0.50
Minimum weight of rail (calculated) (lb/yd)1416
Geometry Relating to Tractive Effort
Driver Diameter (in)2428
Boiler Pressure (psi)150160
High Pressure Cylinders (dia x stroke) (in)7" x 12"8" x 12"
Tractive Effort (lbs)31243730
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.44 5.09
Heating Ability
Firebox Area (sq ft)18.6024.40
Grate Area (sq ft) 4.52 6.27
Evaporative Heating Surface (sq ft)130172
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)130172
Evaporative Heating Surface/Cylinder Volume243.21246.37
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6781003
Same as above plus superheater percentage6781003
Same as above but substitute firebox area for grate area27903904
Power L125033144
Power MT649.20729.61

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