Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 66 pp. 273+. Works numbers were 53093-53095 in April 1920.
This trio of Mikados had 8" (203 mm) piston valves. The specs insisted the locomotive was "to be very flexible. " The company had wanted these Mikes to have an 11-foot wheelbase, but accepted the extra 6 inches "providing same flexibility is retained."
Baldwin's efforts weren't quite satisfactory according to a "Hereafter" note referring to a 10 August 1922 letter detailing criticisms and suggesting changes. Some other Hereafter observations referred to crank collars and side rods that needed strengthening.
They were later operated by the Araraquara Railway, where they were renumbered 303-305.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 32 |
| Locobase ID | 15127 |
| Railroad | Sao Paulo Northern |
| Country | Brazil |
| Whyte | 2-8-2 |
| Number in Class | 3 |
| Road Numbers | 32-34 / 300-305 |
| Gauge | Metre |
| Number Built | 3 |
| Builder | Baldwin |
| Year | 1920 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.50 / 3.51 |
| Engine Wheelbase (ft / m) | 24.67 / 7.52 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.47 |
| Overall Wheelbase (engine & tender) (ft / m) | 51.43 / 15.68 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 22,046 |
| Weight on Drivers (lbs / kg) | 88,000 / 39,916 |
| Engine Weight (lbs / kg) | 121,500 / 55,112 |
| Tender Loaded Weight (lbs / kg) | 62,500 / 28,350 |
| Total Engine and Tender Weight (lbs / kg) | 184,000 / 83,462 |
| Tender Water Capacity (gals / ML) | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 43 / 1092 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 20" / 432x508 |
| Tractive Effort (lbs / kg) | 20,566 / 9328.59 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.28 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 221 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 15.50 / 4.72 |
| Firebox Area (sq ft / m2) | 117 / 10.87 |
| Grate Area (sq ft / m2) | 17.80 / 1.65 |
| Evaporative Heating Surface (sq ft / m2) | 1901 / 176.61 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1901 / 176.61 |
| Evaporative Heating Surface/Cylinder Volume | 361.81 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3204 |
| Same as above plus superheater percentage | 3204 |
| Same as above but substitute firebox area for grate area | 21,060 |
| Power L1 | 6104 |
| Power MT | 611.68 |