Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 21, p.144. Works numbers were 15776-15778 in March 1898.
The Spanish Corps of Military Engineers bought this trio of Moguls and appropriately specified royal names: Alfonso XIII (then King), Maria Cristina (his queen), and Princesa Mercedes.
They were intended for the Cauto Railway in Cuba. Specs called for a 70-ton trailing load on 2% grades and the ability to negotiate 75-100-metre curves. On the level, one of these blue-bloods was to haul 450 tons.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Alfonso XIII |
| Locobase ID | 12262 |
| Railroad | Cauto |
| Country | Cuba |
| Whyte | 2-6-0 |
| Number in Class | 3 |
| Road Numbers | 1-3 |
| Gauge | 75 cm |
| Number Built | 3 |
| Builder | Burnham, Williams & Co |
| Year | 1898 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.75 / 2.36 |
| Engine Wheelbase (ft / m) | 13.50 / 4.11 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.57 |
| Overall Wheelbase (engine & tender) (ft / m) | 28 / 8.53 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 25,000 / 11,340 |
| Engine Weight (lbs / kg) | 30,000 / 13,608 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 900 / 3.41 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 14 / 7 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33 / 838 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 16" / 254x406 |
| Tractive Effort (lbs / kg) | 6594 / 2990.99 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.79 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 89 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 7.25 / 2.21 |
| Firebox Area (sq ft / m2) | 32 / 2.97 |
| Grate Area (sq ft / m2) | 6.60 / 0.61 |
| Evaporative Heating Surface (sq ft / m2) | 282 / 26.21 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 282 / 26.21 |
| Evaporative Heating Surface/Cylinder Volume | 193.89 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1056 |
| Same as above plus superheater percentage | 1056 |
| Same as above but substitute firebox area for grate area | 5120 |
| Power L1 | 2674 |
| Power MT | 707.42 |