Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 36, p. 256; Volume 49, p. 118. Works numbers were 35273-35274 in September 1910, 38792-38794 in November 1912.
Bought by United Fruit as the latest in a long series of 4-6-0s of very similar specifications (see earlier, lighter engines at Locobase 12117), the principal difference between these locomotives and the earlier Ten-wheelers was the adoption of oil firing, a three-ton increase in weight and the use of outside radial Walschaert gear in 27-28/84-85. (The last three reverted to inside Stephenson link motion.). The combustion chamber contributed 23.4 sq ft to the direct heating surface area.
Like the others, these engines were rated for "heavy, 3 1/2%" grades and 15-degree curves, so the flues were to be "sloped to be covered with water on grades."
27-28 were renumbered 84-85 in 1913, apparently to make way for the similar 27-29
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 27 |
Locobase ID | 14194 |
Railroad | International Railway of Central America |
Country | Guatemala |
Whyte | 4-6-0 |
Number in Class | 5 |
Road Numbers | 27-28, 27-29/ 84-85, 56-58 |
Gauge | 3' |
Number Built | 5 |
Builder | Baldwin |
Year | 1910 |
Valve Gear | various |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 7.42 / 2.26 |
Engine Wheelbase (ft / m) | 16.75 / 5.11 |
Ratio of driving wheelbase to overall engine wheelbase | 0.44 |
Overall Wheelbase (engine & tender) (ft / m) | 44.62 / 13.60 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 78,700 / 35,698 |
Engine Weight (lbs / kg) | 95,300 / 43,227 |
Tender Loaded Weight (lbs / kg) | 60,000 / 27,216 |
Total Engine and Tender Weight (lbs / kg) | 155,300 / 70,443 |
Tender Water Capacity (gals / ML) | 3000 / 11.36 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1350 / 5110 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 40 / 1016 |
Boiler Pressure (psi / kPa) | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 20" / 432x508 |
Tractive Effort (lbs / kg) | 22,109 / 10028.49 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.56 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 200 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 13.33 / 4.06 |
Firebox Area (sq ft / m2) | 106.40 / 9.89 |
Grate Area (sq ft / m2) | 16.10 / 1.50 |
Evaporative Heating Surface (sq ft / m2) | 1492 / 138.66 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1492 / 138.66 |
Evaporative Heating Surface/Cylinder Volume | 283.97 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2898 |
Same as above plus superheater percentage | 2898 |
Same as above but substitute firebox area for grate area | 19,152 |
Power L1 | 4623 |
Power MT | 388.51 |