Data from "Catalogue No. 10036--Locomotives for Export", American Locomotive Company (New York City: American Locomotive Company (April 1910)., pp. 17-19, 23-26.
Alco's illustration shows a locomotive with "American Locomotive Company" on the tender and "E. Ramos Mejia" under the cab window. The locomotive's name almost certainly refers to Eziquiel Ramos Mejia, minister of public works under successive administrations from 1906-1913.
The only Alco production Pacifics shown with 19 x 26 cylinders and 54" drivers were four for the Rio Grande do Sol in 1920.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | E Ramos Mejias |
| Locobase ID | 20189 |
| Railroad | |
| Country | Argentina |
| Whyte | 4-6-2 |
| Number in Class | 4 |
| Road Numbers | |
| Gauge | Metre |
| Number Built | 4 |
| Builder | Alco |
| Year | |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.50 / 2.90 |
| Engine Wheelbase (ft / m) | 26.50 / 8.08 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 |
| Overall Wheelbase (engine & tender) (ft / m) | 52.81 / 16.10 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 87,700 / 39,780 |
| Engine Weight (lbs / kg) | 133,500 / 60,555 |
| Tender Loaded Weight (lbs / kg) | 96,000 / 43,545 |
| Total Engine and Tender Weight (lbs / kg) | 229,500 / 104,100 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 11 / 10 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 49 / 24.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 26" / 483x660 |
| Tractive Effort (lbs / kg) | 23,639 / 10722.48 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.71 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 146 - 2" / 51 |
| Flues (number - dia) (in / mm) | 18 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 15.73 / 4.79 |
| Firebox Area (sq ft / m2) | 102 / 9.48 |
| Grate Area (sq ft / m2) | 27.80 / 2.58 |
| Evaporative Heating Surface (sq ft / m2) | 1683 / 156.36 |
| Superheating Surface (sq ft / m2) | 311 / 28.89 |
| Combined Heating Surface (sq ft / m2) | 1994 / 185.25 |
| Evaporative Heating Surface/Cylinder Volume | 197.25 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4448 |
| Same as above plus superheater percentage | 5160 |
| Same as above but substitute firebox area for grate area | 18,931 |
| Power L1 | 8425 |
| Power MT | 635.37 |