Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 31, p. 13 and Vol 49, p. 71. See also Cesar J Ayala, American sugar kingdom: the plantation economy of the Spanish Caribbean 1898-1934 (University of North Carolina Press, 1999), p. 144. Works numbers were 31705 in September 1907 and 33594 in July 1909.
The Central Vannina was incorporated by Vannina Central Inc in 1911 to serve plantations and a mill in the Rio Piedras region of Puerto Rico. Linked by a 12 km (7.5 mile) line to Guaynabo, the mill was rated at startup as capable of processing 600 tons of cane per day. Along with the charter came a revocable permit to draw 200 litres (53 US gallons) per second from the Rio Piedras.
As metre-gauge radial tanks went, the Guaynabo was of middling size and power.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Guaynabo |
| Locobase ID | 14180 |
| Railroad | Central Vannina |
| Country | USA-Puerto Rico |
| Whyte | 0-6-2T |
| Number in Class | 1 |
| Road Numbers | 4 |
| Gauge | Metre |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1911 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.33 / 2.23 |
| Engine Wheelbase (ft / m) | 14.43 / 4.40 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.51 |
| Overall Wheelbase (engine & tender) (ft / m) | 14.43 / 4.40 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 40,000 / 18,144 |
| Engine Weight (lbs / kg) | 46,000 / 20,865 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 46,000 |
| Tender Water Capacity (gals / ML) | 500 / 1.89 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 22 / 11 |
| 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) | 11" x 16" / 279x406 |
| Tractive Effort (lbs / kg) | 7979 / 3619.22 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.01 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 85 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.25 / 3.12 |
| Firebox Area (sq ft / m2) | 46 / 4.27 |
| Grate Area (sq ft / m2) | 9.30 / 0.86 |
| Evaporative Heating Surface (sq ft / m2) | 442 / 41.06 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 442 / 41.06 |
| Evaporative Heating Surface/Cylinder Volume | 251.14 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1488 |
| Same as above plus superheater percentage | 1488 |
| Same as above but substitute firebox area for grate area | 7360 |
| Power L1 | 3360 |
| Power MT | 555.56 |