Data from "Narrow Gauge Tank Locomotive for Brazil," The Locomotive Magazine, Vol VIII (30 May 1903), p. 380. See also DeGolyer, Volume 17, p. 40. Works numbers were 11977 and 11980 in June 1891.
This little tank was rated at 55 tons up a 3% grade at 12 mph and curves with radii as small as 50 metres radius. Cabras was first, followed by Campinas. Two succeeding engines of the same arrangement doubtless were quite similar except for their Vauclain compound arrangement of 7" and 12" cylinders; see Locobase 12070.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 17, p. 161 Works numbers were 13458-13459 in May 1893.
The second of this pair of Prairie tanks was named Joao Rodovalho. They were essentially the same as the two simple-expansion locomotives described in Locobase 10332.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | Cabras | Jose Paulino |
| Locobase ID | 10332 | 12070 |
| Railroad | Ramal Ferreo Campinero | Ramal Ferreo Campiniero |
| Country | Brazil | Brazil |
| Whyte | 2-6-2T | 2-6-2T |
| Number in Class | 2 | 2 |
| Road Numbers | 1-2 | 3-4 |
| Gauge | 60 cm | 60 cm |
| Number Built | 2 | 2 |
| Builder | Burnham, Williams & Co | Burnham, Williams & Co |
| Year | 1891 | 1893 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 7.50 / 2.29 | 7.50 / 2.29 |
| Engine Wheelbase (ft / m) | 19.83 / 6.04 | 19.83 / 6.04 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.38 | 0.38 |
| Overall Wheelbase (engine & tender) (ft / m) | 19.83 / 6.04 | 19.83 / 6.04 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 33,600 / 15,241 | 36,000 / 16,329 |
| Engine Weight (lbs / kg) | 47,040 / 21,337 | 48,000 / 21,772 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | 47,040 / 21,337 | 48,000 / 21,772 |
| Tender Water Capacity (gals / ML) | 660 / 2.50 | 550 / 2.08 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 19 / 9.50 | 20 / 10 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 33 / 838 | 35 / 889 |
| Boiler Pressure (psi / kPa) | 130 / 900 | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 16" / 279x406 | 7" x 16" / 178x406 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 12" x 16" / 305x406 | |
| Tractive Effort (lbs / kg) | 6483 / 2940.64 | 5114 / 2319.67 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.18 | 7.04 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 62 - 2" / 51 | 62 - 2" / 51 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 10.92 / 3.33 | 10.92 / 3.33 |
| Firebox Area (sq ft / m2) | 39.98 / 3.71 | 39.93 / 3.71 |
| Grate Area (sq ft / m2) | 8 / 0.74 | 7.90 / 0.73 |
| Evaporative Heating Surface (sq ft / m2) | 392 / 36.42 | 392 / 36.43 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 392 / 36.42 | 392 / 36.43 |
| Evaporative Heating Surface/Cylinder Volume | 222.74 | 550.04 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1040 | 1422 |
| Same as above plus superheater percentage | 1040 | 1422 |
| Same as above but substitute firebox area for grate area | 5197 | 7187 |
| Power L1 | 2405 | 2966 |
| Power MT | 473.40 | 544.91 |