Data from "Locomotives of the Sao Paulo Railway," The Locomotive Magazine, Volume IX [9] (26 December 1903), p. 366. (Thanks to Teemu Koivumaki whose 2023 email included a comprehensive spreadsheet of Brazilian steam locomotive builders, works numbers, and owners.) Works numbers were 3408 in 1888, 3586 in 1890, and 3783-3784 in 1892.
The most unusual feature of this otherwise conventional broad-gauge Eight-wheeler was the tender, which had a bogie under the front half and a single axle under the rear half. Locobase wonders if turntable length forced a bobtailing of a two-bogie 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
Data from "Locomotives of the Sao Paulo Railway," The Locomotive Magazine, Volume IX [9] (26 December 1903), p. 366. Works numbers were 4422-4426 in 1898.
Responding to increased passenger traffic demand, the SPR ordered more locomotives from its principal supplier.
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 | 27 | 70 |
| Locobase ID | 10421 | 10424 |
| Railroad | Sao Paulo Railway | Sao Paulo Railway |
| Country | Brazil | Brazil |
| Whyte | 4-4-0 | 4-4-0 |
| Number in Class | 4 | 4 |
| Road Numbers | 27, 31, 41-42 | 74-77/70-73 |
| Gauge | 5'3" | 5'3" |
| Number Built | 4 | 4 |
| Builder | Sharp, Stewart | Sharp, Stewart |
| Year | 1888 | 1898 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 7.75 / 2.36 | 8.25 / 2.51 |
| Engine Wheelbase (ft / m) | 20 / 6.10 | |
| Ratio of driving wheelbase to overall engine wheelbase | 0.39 | |
| Overall Wheelbase (engine & tender) (ft / m) | 37.08 / 11.30 | 41.27 / 12.58 |
| 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) | ||
| 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) | 63.50 / 1613 | 72 / 1829 |
| Boiler Pressure (psi / kPa) | 140 / 970 | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.75" x 24" / 425x610 | 18" x 24" / 457x610 |
| Tractive Effort (lbs / kg) | 12,619 / 5723.89 | 16,524 / 7495.17 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | ||
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 160 - 2" / 51 | 200 - 2" / 51 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 10.83 / 3.30 | 11.25 / 3.43 |
| Firebox Area (sq ft / m2) | 90 / 8.36 | 109 / 10.13 |
| Grate Area (sq ft / m2) | 15.50 / 1.44 | 23 / 2.14 |
| Evaporative Heating Surface (sq ft / m2) | 994 / 92.38 | 1283 / 119.24 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 994 / 92.38 | 1283 / 119.24 |
| Evaporative Heating Surface/Cylinder Volume | 162.39 | 181.51 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 2170 | 4140 |
| Same as above plus superheater percentage | 2170 | 4140 |
| Same as above but substitute firebox area for grate area | 12,600 | 19,620 |
| Power L1 | 3495 | 5586 |
| Power MT | ||