Central Constancia Sugar 2-6-0 Locomotives in USA-Puerto_Rico


Class Details by Steve Llanso of Sweat House Media

Class Toa Baja (Locobase 14762)

Data from Baldwin Locomotive Works, Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 63, pp. 259 and Volume 72, pp. 64+ . Works numbers were 57400 in October 1923 and 58044 in September 1924..

Compania Azucarera del Toa Baja, Puerto Rico operated the Constancia and bought this tiny plantation Mogul. It ran on 20-25 lb/yard (10-12.5 kg/metre) rail and radii of 70 feet (21.3 metres). The 8's boiler pressure rose to 175 psi (12 bar) and tractive effort increased to 6,024 lb (2,732 kg).

The two later engines (numbered for earlier 1 and 2) had the same power dimensions as the 8, but were oil burners; see Locobase 16509.


Class Toa Baja (Locobase 16509)

Data from Baldwin Locomotive Works, Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 78, pp. 89+. Works numbers were 58782 in October 1925, and 59447 in August 1926.

Compania Azucarera del Toa Baja, Puerto Rico operated the Constancia and bought two coal-burning Moguls to run on their light, narrow rail; see Locobase 14762.

The two later engines (numbered for earlier 1 and 2) described here were repeat plantation Mogul designs except for the substitution of "heavy Tampico oil" for coal fuel. The burner was "BLW standard, with burner in front end of fire box." Another change was the need to line the firebox with fire brick "for oil burning."

The 2 came ten months later with a larger tender. It carried more oil (500 US gallons/1,893 litres) and weighed 17,200 lb (7,802 kg).

Principal Dimensions by Steve Llanso of Sweat House Media

ClassToa BajaToa Baja
Locobase ID14762 16509
RailroadCentral Constancia SugarCentral Constancia Sugar
CountryUSA-Puerto RicoUSA-Puerto Rico
Whyte2-6-02-6-0
Number in Class42
Road Numbers7-8, 1-21-2
Gauge2'6"2'6"
Number Built42
BuilderBaldwinBaldwin
Year19231925
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.08 / 1.85 6.08 / 1.85
Engine Wheelbase (ft / m)10.75 / 3.2810.75 / 3.28
Ratio of driving wheelbase to overall engine wheelbase 0.57 0.57
Overall Wheelbase (engine & tender) (ft / m)23.33 / 7.1123.33 / 7.11
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)24,000 / 10,88624,000 / 10,886
Engine Weight (lbs / kg)28,000 / 12,70128,000 / 12,701
Tender Loaded Weight (lbs / kg)14,000 / 635015,500 / 7031
Total Engine and Tender Weight (lbs / kg)42,000 / 19,05143,500 / 19,732
Tender Water Capacity (gals / ML)600 / 2.27600 / 2.27
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)1 / 1300 / 1136
Minimum weight of rail (calculated) (lb/yd / kg/m)13 / 6.5013 / 6.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)28 / 71128 / 711
Boiler Pressure (psi / kPa)160 / 11160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)9" x 14" / 229x3569" x 14" / 229x356
Tractive Effort (lbs / kg)5508 / 2498.395508 / 2498.39
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.36 4.36
Heating Ability
Tubes (number - dia) (in / mm)51 - 1.75" / 4451 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)6 / 1.836 / 1.83
Firebox Area (sq ft / m2)29 / 2.6929 / 2.69
Grate Area (sq ft / m2) 4.80 / 0.45 4.80 / 0.45
Evaporative Heating Surface (sq ft / m2)167 / 15.51167 / 15.51
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)167 / 15.51167 / 15.51
Evaporative Heating Surface/Cylinder Volume162.14162.14
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation768768
Same as above plus superheater percentage768768
Same as above but substitute firebox area for grate area46404640
Power L122622262
Power MT623.36623.36

All material Copyright © SteamLocomotive.com
Wes Barris