Caguas Tramway Company 2-6-0 Locomotives in USA-Puerto_Rico


Class Details by Steve Llanso of Sweat House Media

Class 1-5 (Locobase 13258)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p.169. See Allen Morrison, The Tramways of San Juan Puerto Rico at [link], last accessed on 15 October 2011. Works numbers were 32640-32641 in January 1908, 33096

in December, 36921 in September 1911, 38300 in September 1912.

The American Railway of Porto Rico bought the first two Moguls to use on their 18-mile Rio Piedras-Caguas tramway, which was an electric interurban line. In the event, Caguas never actually operated a tram line and the standard-gauge track was narrowed before any deliveries to the metre gauge. The third locomotive arrived about a year later. The other two were purchased on behalf of the Porto Rico Railway Light & Power Company, which designated them for the Caguas as their 4-5.

Despite the short length and original intent, the Caguas offered challenges to the new engines. The specs reveal that curves could bend as much as 20 degrees (190 ft / 58 metres radius) and grades reached 3%; the latter were to be scaled by one of these engines while hauling 200-215 short tons. The resulting locomotives were relatively large and powerful for the gauge and wheel arrangement.

CTC operated until 1928 as a common-carrier steam railroad. On 13 September 1928, the island, and particularly San Juan, was ravaged by the only Category 5 hurricane ever to make landfall there. The impact was so widespread that much of the CTC was destroyed or heavily damaged.

Four of the five engines were later operated by the American Railroad of Puerto Rico as the 111-113 (the ex-5's numbers wasn't recorded). The 4 was sold to Eastern Sugar Company.

Principal Dimensions by Steve Llanso of Middle Run Media
Class1-5
Locobase ID13258
RailroadCaguas Tramway Company
CountryUSA-Puerto Rico
Whyte2-6-0
Number in Class5
Road Numbers1-5
GaugeMetre
Number Built5
BuilderBurnham, Williams & Co
Year1908
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.50 / 3.81
Engine Wheelbase (ft / m)18.83 / 5.74
Ratio of driving wheelbase to overall engine wheelbase 0.61
Overall Wheelbase (engine & tender) (ft / m)46.42 / 14.15
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)80,000 / 36,287
Engine Weight (lbs / kg)90,000 / 40,823
Tender Loaded Weight (lbs / kg)60,000 / 27,216
Total Engine and Tender Weight (lbs / kg)150,000 / 68,039
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)5 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)44 / 22
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)160 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)17" x 22" / 432x559
Tractive Effort (lbs / kg)19,652 / 8914.01
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.07
Heating Ability
Tubes (number - dia) (in / mm)176 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.52 / 3.21
Firebox Area (sq ft / m2)99 / 9.20
Grate Area (sq ft / m2)15.80 / 1.47
Evaporative Heating Surface (sq ft / m2)1061 / 98.57
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1061 / 98.57
Evaporative Heating Surface/Cylinder Volume183.56
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2528
Same as above plus superheater percentage2528
Same as above but substitute firebox area for grate area15,840
Power L13159
Power MT261.16

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