Tubarao a Ararangua 2-8-2 Locomotives in Brazil

Class Details by Steve Llanso of Sweat House Media

Class 20/400/1400 (Locobase 20499)

Data from and "American Locomotives for Exhibition at the Brazillian Centennial in Rio de Janeiro", Railway Review, Volume 72, No 7 (17 February 1923), p. 286; and "Locomotives for the Brazilian Centennial Exhibition", Railway Age, Volume 74, No 8 (24 February 1923), pp. 467-468. Works number was 63711 in December 1922.

What quickly comes into view when examining the specs for this one-off locomotive is the enormous firebox and grate mounted in this Mikado. Brazil's low-calorie coal imposed a need for a firebox designed essentially on Wootten lines - wide enough to allow a soft draft over the very light fuel. Piston valves measured 9" (229 mm) in diameter.

The EF de T a A was a new coal road in Santa Catharina state built by the government and leased to the Cia Brasiliera Carbonifera de Ararangua. At the time of the sale, 35 miles (56 km) of railway was finished with another 22 (35 km) under construction

The engine apparently soon made its way to the Central do Brazil. Locobase 14516 shows that the Central went to Baldwin for 13 more in 1927 that followed this design closely. As noted under that entry, additions to the firebox in the latter batch increased firebox heating surface area noticeably.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20499
RailroadTubarao a Ararangua
Number in Class1
Road Numbers20
Number Built1
BuilderMontreal LW
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.25 / 3.43
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)49.92 / 15.22
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)84,000 / 38,102
Engine Weight (lbs / kg)120,000 / 54,431
Tender Loaded Weight (lbs / kg)62,600 / 28,395
Total Engine and Tender Weight (lbs / kg)182,600 / 82,826
Tender Water Capacity (gals / ML)2600 / 9.85
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)5 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)35 / 17.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 1067
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 22" / 406x559
Tractive Effort (lbs / kg)20,517 / 9306.37
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.09
Heating Ability
Tubes (number - dia) (in / mm)90 - 2" / 51
Flues (number - dia) (in / mm)15 - 5.375" / 137
Flue/Tube length (ft / m)11.75 / 3.58
Firebox Area (sq ft / m2)157 / 14.59
Grate Area (sq ft / m2)47 / 4.37
Evaporative Heating Surface (sq ft / m2)954 / 88.63
Superheating Surface (sq ft / m2)200 / 18.58
Combined Heating Surface (sq ft / m2)1154 / 107.21
Evaporative Heating Surface/Cylinder Volume186.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation8460
Same as above plus superheater percentage9898
Same as above but substitute firebox area for grate area33,064
Power L18710
Power MT914.39

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