Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 31, p. 79. Works number was 32259 in November 1907.
Like other small Moguls in the DR, this locomotive was a Vauclain compound produced to a spec that required the crown sheet to be covered with water on a 9% grade. It also needed to clear the rack located between the 45-lb/yard (22.5-kg/metre) rails. Each 7" piston fed both the HP and LP cylinder on a side.
When the F Ma S was taken over by the Central Dominicano, this locomotive received road number 11.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 26 de Julio |
| Locobase ID | 13206 |
| Railroad | Moca a Santiago |
| Country | Dominican Republic |
| Whyte | 2-6-0 |
| Number in Class | 1 |
| Road Numbers | 1 / 11 |
| Gauge | 2'6" |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1907 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.17 / 2.49 |
| Engine Wheelbase (ft / m) | 14.92 / 4.55 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.55 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 50,800 / 23,043 |
| Engine Weight (lbs / kg) | 58,000 / 26,308 |
| Tender Loaded Weight (lbs / kg) | 20,000 / 9072 |
| Total Engine and Tender Weight (lbs / kg) | 78,000 / 35,380 |
| Tender Water Capacity (gals / ML) | 1000 / 3.79 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 28 / 14 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33 / 838 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 9" x 16" / 229x406 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 15" x 16" / 381x406 |
| Tractive Effort (lbs / kg) | 8836 / 4007.95 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.75 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 115 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.67 / 3.86 |
| Firebox Area (sq ft / m2) | 49.20 / 4.57 |
| Grate Area (sq ft / m2) | 10.80 / 1 |
| Evaporative Heating Surface (sq ft / m2) | 806 / 74.91 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 806 / 74.91 |
| Evaporative Heating Surface/Cylinder Volume | 684.15 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1944 |
| Same as above plus superheater percentage | 1944 |
| Same as above but substitute firebox area for grate area | 8856 |
| Power L1 | 3183 |
| Power MT | 414.41 |