Data from "Locomotives of the Sao Paulo Railway," The Locomotive Magazine, Vol IX (26 December 1903), p. 366
Identical in most respects to the Eight-wheelers delivered to the SPR in the same period (Locobase 10421), these had a trailing pony truck supporting the coal bunker. They were heavier than the 4-4-0s and that extra adhesive power suited them for both passenger and freight traffic.
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 | 2 |
| Locobase ID | 10423 |
| Railroad | Sao Paulo Railway |
| Country | Brazil |
| Whyte | 4-4-2T |
| Number in Class | 7 |
| Road Numbers | 2-4, 32-34, 43 |
| Gauge | 5'3" |
| Number Built | 7 |
| Builder | Sharp, Stewart |
| Year | 1888 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.75 / 2.36 |
| Engine Wheelbase (ft / m) | 26.12 / 7.96 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.30 |
| Overall Wheelbase (engine & tender) (ft / m) | 26.12 / 7.96 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 56,000 / 25,401 |
| Engine Weight (lbs / kg) | 100,800 / 45,722 |
| 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) | 47 / 23.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 63.50 / 1613 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.75" x 24" / 425x610 |
| Tractive Effort (lbs / kg) | 12,619 / 5723.89 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.44 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 160 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.83 / 3.30 |
| Firebox Area (sq ft / m2) | 90 / 8.36 |
| Grate Area (sq ft / m2) | 15.50 / 1.44 |
| Evaporative Heating Surface (sq ft / m2) | 994 / 92.38 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 994 / 92.38 |
| Evaporative Heating Surface/Cylinder Volume | 162.39 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2170 |
| Same as above plus superheater percentage | 2170 |
| Same as above but substitute firebox area for grate area | 12,600 |
| Power L1 | 3495 |
| Power MT | 275.18 |