Data from NdeM 1926ca Locomotive Diagrams supplied in December 2010 by Allen Stanley.
The Interoceanico went to two builders in 1901 for this class. Two of the engines came from Baldwin; they were numbered 3 and 4 and appear in Locobase 11912. The other 5 came from England's Kerr, Stuart and they are shown here.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 24, p. 263 and NdeM 1926ca Locomotive Diagrams supplied in December 2010 by Allen Stanley. Baldwin works numbers were 20384-20385 in April 1902.
The Interoceanico went to two builders in 1901 for this class. Five came from England's Kerr, Stuart and they are shown in Locobase 11911. This pair appear to have preceded the Kerr, Stuarts. They had a few more tubes, a little higher boiler pressure, larger firebox.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 1 | 3 |
Locobase ID | 11911 | 11912 |
Railroad | San Marco y Tecolutla | San Marco y Tecolutla |
Country | Mexico | Mexico |
Whyte | 2-8-0 | 2-8-0 |
Number in Class | 5 | 2 |
Road Numbers | 1-2, 73-75 / 142-143, 73-75 | 3-4/144-145 |
Gauge | 3' | 3' |
Number Built | 5 | 2 |
Builder | Kerr, Stuart & Co | Burnham, Williams & Co |
Year | 1904 | 1902 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 10.92 / 3.33 | 10.92 / 3.33 |
Engine Wheelbase (ft / m) | 17.67 / 5.39 | 17.17 / 5.23 |
Ratio of driving wheelbase to overall engine wheelbase | 0.62 | 0.64 |
Overall Wheelbase (engine & tender) (ft / m) | 42.58 / 12.98 | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 84,880 / 38,501 | 87,000 / 39,463 |
Engine Weight (lbs / kg) | 98,460 / 44,661 | 95,000 / 43,091 |
Tender Loaded Weight (lbs / kg) | 70,265 / 31,872 | 70,265 / 31,872 |
Total Engine and Tender Weight (lbs / kg) | 168,725 / 76,533 | 165,265 / 74,963 |
Tender Water Capacity (gals / ML) | 3000 / 11.36 | 3000 / 11.36 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1920 / 7267 | 1920 / 7267 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 35 / 17.50 | 36 / 18 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 38 / 965 | 38 / 965 |
Boiler Pressure (psi / kPa) | 175 / 1210 | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 | 16" x 20" / 406x508 |
Tractive Effort (lbs / kg) | 20,042 / 9090.91 | 20,615 / 9350.82 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.24 | 4.22 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 170 - 2" / 51 | 179 - 2" / 51 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 14.54 / 4.43 | 14.50 / 4.42 |
Firebox Area (sq ft / m2) | 73.60 / 6.84 | 83.80 / 7.79 |
Grate Area (sq ft / m2) | 16.87 / 1.57 | 16.87 / 1.57 |
Evaporative Heating Surface (sq ft / m2) | 1368 / 127.14 | 1437 / 133.55 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 1368 / 127.14 | 1437 / 133.55 |
Evaporative Heating Surface/Cylinder Volume | 294.19 | 309.03 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 2952 | 3037 |
Same as above plus superheater percentage | 2952 | 3037 |
Same as above but substitute firebox area for grate area | 12,880 | 15,084 |
Power L1 | 4138 | 4550 |
Power MT | 429.91 | 461.20 |