Data from Angus Sinclair, Railway and Locomotive Engineering, May 1902, p. 202; and DeGolyer, Volume 24, p. 224 and Volume 30, p. 199.. Works numbers were 32068 in October 1907, 32142 in November, 33076-33077 in December, and 33315 in April 1909.
A few months after the SAI bought their two Moguls (Locobase 9758), they apparently decided the design didn't need the leading truck after all. The ruling grade was a relatively gentle 1%, but the curve radii arced to a maximum of 30 degrees.
Although boiler capacity differed little, the vessel holding just two more tubes than those of the Moguls, it was set at a higher pressure. A significantly smaller grate perhaps reflected the engine's primary role as switchers.
(33076-33077 originally bore 28-29 as road numbers, but were reassigned 54-55 before delivery.)
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 25, 54 |
| Locobase ID | 20918 |
| Railroad | Spanish-American Iron |
| Country | Cuba |
| Whyte | 0-6-0 |
| Number in Class | 5 |
| Road Numbers | 25-26, 54-56 |
| Gauge | Std |
| Number Built | 5 |
| Builder | Burnham, Williams & Co |
| Year | 1907 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10.50 / 3.20 |
| Engine Wheelbase (ft / m) | 10.50 / 3.20 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 100,500 / 45,586 |
| Engine Weight (lbs / kg) | 100,500 / 45,586 |
| Tender Loaded Weight (lbs / kg) | 60,000 / 27,216 |
| Total Engine and Tender Weight (lbs / kg) | 160,500 / 72,802 |
| Tender Water Capacity (gals / ML) | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 56 / 28 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 50 / 1270 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 24" / 457x610 |
| Tractive Effort (lbs / kg) | 23,795 / 10793.24 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.22 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 202 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.25 / 4.04 |
| Firebox Area (sq ft / m2) | 103.70 / 9.63 |
| Grate Area (sq ft / m2) | 15.20 / 1.41 |
| Evaporative Heating Surface (sq ft / m2) | 1496 / 138.98 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1496 / 138.98 |
| Evaporative Heating Surface/Cylinder Volume | 211.64 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2736 |
| Same as above plus superheater percentage | 2736 |
| Same as above but substitute firebox area for grate area | 18,666 |
| Power L1 | 4275 |
| Power MT | 281.34 |