Data from "Locomotives of the Sao Paulo Railway," The Locomotive Magazine, Volume IX [9] (26 December 1903), p. 366. (Thanks to Teemu Koivumaki for his 13 February 2021 email noting the works numbers and driver diameter differences.). Works numbers were 3409-3411 in 1887, 3699-3704 in 1891, 3914-3919 in 1893, and 4132-4134 in 1895.
LM reported in 1903 that the class appeared "distinctly American in design", but had plate frames rather than bar frames. The journal added that at time of publication, this was the largest single class of locomotives on the SPR.
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | 28 |
Locobase ID | 10422 |
Railroad | Sao Paulo Railway |
Country | Brazil |
Whyte | 2-6-0 |
Number in Class | 18 |
Road Numbers | 28-29, 30, 35-40, 44-52 |
Gauge | 5'3" |
Number Built | 18 |
Builder | Sharp, Stewart |
Year | 1900 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 7.55 / 2.30 |
Engine Wheelbase (ft / m) | 16.40 / 5 |
Ratio of driving wheelbase to overall engine wheelbase | 0.46 |
Overall Wheelbase (engine & tender) (ft / m) | 35.76 / 10.90 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 28,660 / 13,000 |
Weight on Drivers (lbs / kg) | 59,811 / 27,130 |
Engine Weight (lbs / kg) | 87,810 / 39,830 |
Tender Loaded Weight (lbs / kg) | 70,548 / 32,000 |
Total Engine and Tender Weight (lbs / kg) | 158,358 / 71,830 |
Tender Water Capacity (gals / ML) | 3168 / 12 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 33 / 16.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 68.90 / 1750 |
Boiler Pressure (psi / kPa) | 174 / 1200 |
High Pressure Cylinders (dia x stroke) (in / mm) | 17.32" x 22.83" / 440x580 |
Tractive Effort (lbs / kg) | 14,701 / 6668.27 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.07 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 223 - 1.732" / 44 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 12.47 / 3.80 |
Firebox Area (sq ft / m2) | 75.32 / 7 |
Grate Area (sq ft / m2) | 18.83 / 1.75 |
Evaporative Heating Surface (sq ft / m2) | 1155 / 107.30 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1155 / 107.30 |
Evaporative Heating Surface/Cylinder Volume | 185.53 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 3276 |
Same as above plus superheater percentage | 3276 |
Same as above but substitute firebox area for grate area | 13,106 |
Power L1 | 4916 |
Power MT | 543.61 |