Data from "Locomotives of the Sao Paulo Railway," The Locomotive Magazine, Volume IX [9] (19 December 1903), p. 356. Boiler pressure is an estimate.Works numbers were 3385 in 1887.
Tatu means "armadillo", which vividly described the pudgy dimensions of this small saddle-tank design.
NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Tatu |
| Locobase ID | 10420 |
| Railroad | Sao Paulo Railway |
| Country | Brazil |
| Whyte | 0-4-0ST |
| Number in Class | 1 |
| Road Numbers | 5 |
| Gauge | 5'3" |
| Number Built | 1 |
| Builder | Sharp, Stewart |
| Year | 1887 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.25 / 2.21 |
| Engine Wheelbase (ft / m) | 7.25 / 2.21 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 7.25 / 2.21 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 480 / 1.82 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 49 / 1245 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 20" / 356x508 |
| Tractive Effort (lbs / kg) | 9520 / 4318.20 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 130 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.50 / 3.20 |
| Firebox Area (sq ft / m2) | 54.20 / 5.04 |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 752 / 69.89 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 752 / 69.89 |
| Evaporative Heating Surface/Cylinder Volume | 211.04 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | 7588 |
| Power L1 | 3282 |
| Power MT | |