American 0-6-0 Locomotives in USA-Puerto_Rico

Class Details by Steve Llanso of Sweat House Media

Class 104 (Locobase 14765)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 63, p. 68. Works numbers were 46892-46893 in November 1917 and 54450-54451 in January 1921.

Specifications describe a railway with 40 lb/yard (20 kg/metre) rails, maximum grades of 2% and average grades of 1.6%, and tight curve radii measuring 50 metres (164 feet) or 35.5 degrees.

A starred entry underscores a certain urgency about the fulfillment of this order: "The greatest care and attention to be given to the workmanship and quality of materials entering into the construction of these locomotives especially to the boiler work. Ry. Co. has seriously complained of the workmanship on boilers of previous locos."

This search for redemption through the delivery of two simple tank engines may account for the instruction: "Special attention to be given to the general appearance of the locomotives so they will be as attractive as possible."

Other notes refer to the desire to have the cab be "as commodious and comfortable as possible" and the cab floor was to be raised in order to give the engineer a better view over the tanks.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID14765
RailroadAmerican (Porto Rico)
CountryUSA-Puerto Rico
Number in Class2
Road Numbers104-105
Number Built2
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)9 / 2.74
Engine Wheelbase (ft / m)9 / 2.74
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)9 / 2.74
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)70,500 / 31,978
Engine Weight (lbs / kg)70,500 / 31,978
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)70,500
Tender Water Capacity (gals / ML)1200 / 4.55
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.50 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)37 / 940
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)13" x 18" / 330x457
Tractive Effort (lbs / kg)13,977 / 6339.87
Booster (lbs)6
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.04
Heating Ability
Tubes (number - dia) (in / mm)103 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)9 / 2.74
Firebox Area (sq ft / m2)54 / 5.02
Grate Area (sq ft / m2)10.90 / 1.01
Evaporative Heating Surface (sq ft / m2)535 / 49.70
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)535 / 49.70
Evaporative Heating Surface/Cylinder Volume193.14
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2180
Same as above plus superheater percentage2180
Same as above but substitute firebox area for grate area10,800
Power L13584
Power MT336.23

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