Sao Paulo a Minas / Cantareira Tramway 2-6-0 Locomotives in Brazil

Class Details by Steve Llanso of Sweat House Media

Class Rio Pardo (Locobase 13476)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 32, p. 253. Works number was 32847 in July 1908.

This little outside-framed, wood-burning Mogul was rated to haul 100 long tons of trailing load up a maximum grade of 2% for 3.2 km(2 miles) and negotiate 100-metre (328-ft) curves. Maximum speed on the level was to be 35 km/h (22 mph). The SP a M ran 135 km (84 miles).

Locobase cannot say if all or part of the Sao Paulo a Minas was rolled into the Cantareira Tramway, but the Rio Pardo certainly moved over. Its younger sister (an identical "twin") was delivered directly to the tramway and is shown in Locobase 13343.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassRio Pardo
Locobase ID13476
RailroadSao Paulo a Minas / Cantareira Tramway
Number in Class1
Road Numbers2
Gauge60 cm
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)7 / 2.13
Engine Wheelbase (ft / m)12.83 / 3.91
Ratio of driving wheelbase to overall engine wheelbase 0.55
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)35,600 / 16,148
Engine Weight (lbs / kg)40,300 / 18,280
Tender Loaded Weight (lbs / kg)30,000 / 13,608
Total Engine and Tender Weight (lbs / kg)70,300 / 31,888
Tender Water Capacity (gals / ML)1800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)20 / 10
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 838
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)12" x 16" / 305x406
Tractive Effort (lbs / kg)8902 / 4037.88
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.00
Heating Ability
Tubes (number - dia) (in / mm)68 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.79 / 3.29
Firebox Area (sq ft / m2)41 / 3.81
Grate Area (sq ft / m2) 7.60 / 0.71
Evaporative Heating Surface (sq ft / m2)422 / 39.20
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)422 / 39.20
Evaporative Heating Surface/Cylinder Volume201.49
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1140
Same as above plus superheater percentage1140
Same as above but substitute firebox area for grate area6150
Power L12470
Power MT458.88

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