Data from DeGolyer, Volume 23, p. 216; and Baldwin Locomotive Company, Record of Recent Contstruction, Volume 24, (Philadelphia: BLW, 1903), pp. 110-111. Works numbers were 18693-18698 in February 1900.
Apparently based on the 1895 8-coupled tanks delivered to Japan's Chikuho Railway, these engines proved problematic for the Rio Tinto. Using fireboxes and boilers of identical cal design, the Rio Tintos used more tubes of smaller diameter and slightly shorter length.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 22 |
| Locobase ID | 21177 |
| Railroad | Rio Tinto |
| Country | Spain |
| Whyte | 0-8-0T |
| Number in Class | 6 |
| Road Numbers | 22-27 |
| Gauge | 3'6" |
| Number Built | 6 |
| Builder | Burnham, Williams & Co |
| Year | 1901 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.33 / 3.45 |
| Engine Wheelbase (ft / m) | 11.33 / 3.45 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 11.33 / 3.45 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 89,395 / 40,549 |
| Engine Weight (lbs / kg) | 89,395 / 40,549 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1200 / 4.55 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 22" / 406x559 |
| Tractive Effort (lbs / kg) | 20,517 / 9306.37 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.36 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 158 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.92 / 3.33 |
| Firebox Area (sq ft / m2) | 82 / 7.62 |
| Grate Area (sq ft / m2) | 16 / 1.49 |
| Evaporative Heating Surface (sq ft / m2) | 864 / 80.27 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 864 / 80.27 |
| Evaporative Heating Surface/Cylinder Volume | 168.76 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2880 |
| Same as above plus superheater percentage | 2880 |
| Same as above but substitute firebox area for grate area | 14,760 |
| Power L1 | 3135 |
| Power MT | 309.26 |