Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 78, pp. 70+. Works numbers were 58619-58620 in August 1926 and 58631-58634 in September.
These passenger American-type Eight-wheelers combined narrow, deep Belpaire fireboxes and moderate superheater area in some of the last of the arrangement built by Baldwin. The boiler was small, but the superheater supplemented the power of the steam admitted to the cylinders through relatively larger 10" (254 mm) piston valves.
Baldwin didn't have a free hand: "The railway company's drawings to be followed wherever possible." And those specs were derived from the American Locomotive Company engines supplied in the same year to theWestern Railway of Havana.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 702 |
| Locobase ID | 15356 |
| Railroad | Havana Central |
| Country | Cuba |
| Whyte | 4-4-0 |
| Number in Class | 6 |
| Road Numbers | 702-707 |
| Gauge | Std |
| Number Built | 6 |
| Builder | Baldwin |
| Year | 1925 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.50 / 2.59 |
| Engine Wheelbase (ft / m) | 23.42 / 7.14 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 |
| Overall Wheelbase (engine & tender) (ft / m) | 46.90 / 14.30 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 69,000 / 31,298 |
| Engine Weight (lbs / kg) | 114,500 / 51,936 |
| Tender Loaded Weight (lbs / kg) | 93,600 / 42,456 |
| Total Engine and Tender Weight (lbs / kg) | 208,100 / 94,392 |
| Tender Water Capacity (gals / ML) | 3500 / 13.26 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2100 / 7949 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 58 / 29 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 68 / 1727 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.5" x 24" / 470x610 |
| Tractive Effort (lbs / kg) | 18,482 / 8383.30 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.73 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 102 - 2" / 51 |
| Flues (number - dia) (in / mm) | 16 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 10.87 / 3.31 |
| Firebox Area (sq ft / m2) | 132 / 12.27 |
| Grate Area (sq ft / m2) | 17.80 / 1.65 |
| Evaporative Heating Surface (sq ft / m2) | 951 / 88.38 |
| Superheating Surface (sq ft / m2) | 182 / 16.91 |
| Combined Heating Surface (sq ft / m2) | 1133 / 105.29 |
| Evaporative Heating Surface/Cylinder Volume | 127.36 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3204 |
| Same as above plus superheater percentage | 3717 |
| Same as above but substitute firebox area for grate area | 27,562 |
| Power L1 | 8877 |
| Power MT | 567.26 |