Dourado 4-6-0 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 13013)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 44, p. 37. Works number was 40080 in June 1913.

Although all three little wood-burning Dourado Ten-wheelers had boilers of approximately the same size, their fireboxes differed in one detail or another. In the case of the latest of the trio, the firebox had a larger grate but was shallower.


Class 2 (Locobase 13009)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 31, p. 190. Works numbers were 34883-34884 in June 1910, 37481 in January 1912, 38272 in December, 40941 in November 1913.

These were by far the biggest Baldwins on the E de F de Dourado's network of 60-cm and metre-gauge lines. The specs emphasized that these wood-burners were weight-limited.


Class 5 (Locobase 13007)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 31, p. 190, Volume 34, p. 333, and Volume 44, p. 37. Works numbers were 32694 in February 1908, 34114 in December 1909 and 40080 in June 1913.

Wood-burning Ten-wheelers equipped with a boiler that was "built for a pressure of 180 lbs." The original 1906 locomotive was fitted with Walschaert's valve gear while the 1909 engine had Stephenson link motion.

The 5 later operated on the Industrial E de F de Perus-Pirapora as their #16.


Class 7 (Locobase 13010)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 34, p. 335. Works number was 34529 in April 1910.

A wood-burning Ten-wheeler like the earlier 2 shown in Locobase 13007, this engine differed in having a slightly larger grate and thus more firebox heating surface. The specs described a road that had 3% grades and curves of 60 metres (196.9 feet) in radius.

A note appended to the specs and acknowledged by "KR" on 7/12/1913 refers to the drawbar placement: "Hereafter: Raise ? [sic] about stopping frames ahead of the firebox and using the Draw Bar through the ashpan. This arrangement permits too much play between the engine and the tender." HB Fisher.

Elsewhere the drawbar is described as having "...long push bar with two side or safety chains." One can appreciate the insecurity such a forward placement might have induced on a narrow, lightly built line. The cast steel frame isn't otherwise described, but probably was a bar frame.

Principal Dimensions by Steve Llanso of Sweat House Media

Class10257
Locobase ID13013 13009 13007 13010
RailroadDouradoDouradoDouradoDourado
CountryBrazilBrazilBrazilBrazil
Whyte4-6-04-6-04-6-04-6-0
Number in Class1531
Road Numbers10 / 182-4, 8-9 / 2-4, 145-6, 87
Gauge60 cmMetre60 cm60 cm
Number Built1531
BuilderBaldwinBaldwinBurnham, Williams & CoBaldwin
Year1913191019081910
Valve GearWalschaertWalschaertSteph/WalschWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)7 / 2.13 7.83 / 2.397 / 2.137 / 2.13
Engine Wheelbase (ft / m)13.75 / 4.1917.17 / 5.2313.75 / 4.1913.75 / 4.19
Ratio of driving wheelbase to overall engine wheelbase 0.51 0.46 0.51 0.51
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)36,000 / 16,32958,700 / 26,62636,000 / 16,32936,000 / 16,329
Engine Weight (lbs / kg)45,000 / 20,41272,600 / 32,93145,000 / 20,41245,000 / 20,412
Tender Loaded Weight (lbs / kg)27,000 / 12,24727,000 / 12,24727,000 / 12,247
Total Engine and Tender Weight (lbs / kg)72,000 / 32,65972,000 / 32,65972,000 / 32,659
Tender Water Capacity (gals / ML)1500 / 5.682400 / 9.091500 / 5.681500 / 5.68
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)20 / 1033 / 16.5020 / 1020 / 10
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 83843 / 109233 / 83833 / 838
Boiler Pressure (psi / kPa)140 / 9.70160 / 11140 / 9.70140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)12" x 16" / 305x40615" x 20" / 381x50812" x 16" / 305x40612" x 16" / 305x406
Tractive Effort (lbs / kg)8308 / 3768.4514,233 / 6455.998308 / 3768.458308 / 3768.45
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.33 4.12 4.33 4.33
Heating Ability
Tubes (number - dia) (in / mm)69 - 2" / 51130 - 2" / 5169 - 2" / 5169 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.79 / 3.9015 / 4.5712.29 / 3.9012.79 / 3.90
Firebox Area (sq ft / m2)45 / 4.1874 / 6.8842 / 3.9045 / 4.18
Grate Area (sq ft / m2) 9.75 / 0.9121 / 1.95 8.75 / 0.81 9.75 / 0.91
Evaporative Heating Surface (sq ft / m2)486 / 45.151089 / 101.21486 / 45.17489 / 45.45
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)486 / 45.151089 / 101.21486 / 45.17489 / 45.45
Evaporative Heating Surface/Cylinder Volume232.05266.22232.05233.48
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1365336012251365
Same as above plus superheater percentage1365336012251365
Same as above but substitute firebox area for grate area630011,84058806300
Power L12614409025592625
Power MT480.24460.83470.14482.26

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