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 | |
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Class | 104 |
Locobase ID | 14765 |
Railroad | American (Porto Rico) |
Country | USA-Puerto Rico |
Whyte | 0-6-0T |
Number in Class | 2 |
Road Numbers | 104-105 |
Gauge | Metre |
Number Built | 2 |
Builder | Baldwin |
Year | 1917 |
Valve Gear | Stephenson |
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 wheelbase | 1 |
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) | |
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 / 1380 |
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 Volume | 193.14 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2180 |
Same as above plus superheater percentage | 2180 |
Same as above but substitute firebox area for grate area | 10,800 |
Power L1 | 3584 |
Power MT | 336.23 |