EF de Braganta 2-6-2 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class Ananindeva (Locobase 13195)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 31, p. 61. Works numbers were 31991-31994 in October 1907.

The most common grade slope, according to the specs, was 1.5% running up to a single kilometer (0.6 mile) with "short parts" reaching 2.5%. Minimum curve radius was 150 metres (492 ft) or about 7 1/2 degrees.

Little Moguls that were smaller than earlier Baldwin engines. The other three locomotives were named Assahyteva, Tomboteva, and Tracvateva.


Class Antonio Lemos (Locobase 12726)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 27, p. 155. Works number was 24811 in November 1904 and 27132 in December 1905.

Although small by North American standards, the 14 and its companion the Augusto Montenegro had good-sized boilers for metre-gauge Prairies.


Class Rio Branco (Locobase 14208)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 49, p. 149. Works number was 40373 in August 1913.

The Bragan had bought two sizes of Baldwin Prairies through Amsinck. The Rio Branco joined the pair of larger 2-6-2s bought in 1904, all three of which sported relatively tall drivers for the gauge. This engine put three more tons on the drivers. Tweaking the design after delivery included making the back driving springs stronger. An item concerning counterbalancing the driving axle cranks inspired a cautious reply: "Raise question before applying" this remedy, most likely because such an intervention was rife for the potential to have unintended consequences.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassAnanindevaAntonio LemosRio Branco
Locobase ID13195 12726 14208
RailroadEF de BragantaEF de BragantaEF de Braganta
CountryBrazilBrazilBrazil
Whyte2-6-22-6-22-6-2
Number in Class421
Road Numbers17-2014-1523
GaugeMetreMetreMetre
Number Built421
BuilderBurnham, Williams & CoBurnham, Williams & CoBaldwin
Year190719041913
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.83 / 2.69 9.33 / 2.84 9.33 / 2.84
Engine Wheelbase (ft / m)22.67 / 6.9124.08 / 7.3424.08 / 7.34
Ratio of driving wheelbase to overall engine wheelbase 0.39 0.39 0.39
Overall Wheelbase (engine & tender) (ft / m)44 / 13.4144.21 / 13.48
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)49,000 / 22,22655,000 / 24,94861,000 / 27,669
Engine Weight (lbs / kg)64,000 / 29,03075,000 / 34,01982,000 / 37,195
Tender Loaded Weight (lbs / kg)40,000 / 18,14434,000 / 15,42252,000 / 23,587
Total Engine and Tender Weight (lbs / kg)104,000 / 47,174109,000 / 49,441134,000 / 60,782
Tender Water Capacity (gals / ML)2000 / 7.582600 / 9.852600 / 9.85
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)5 / 55 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)27 / 13.5031 / 15.5034 / 17
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 106749 / 124549 / 1245
Boiler Pressure (psi / kPa)170 / 1170180 / 1240180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)14" x 18" / 356x45715" x 18" / 381x45715" x 18" / 381x457
Tractive Effort (lbs / kg)12,138 / 5505.7112,646 / 5736.1412,646 / 5736.14
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.04 4.35 4.82
Heating Ability
Tubes (number - dia) (in / mm)90 - 2" / 51140 - 2" / 51140 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13 / 3.9613.83 / 4.2213.83 / 4.22
Firebox Area (sq ft / m2)53 / 4.9376 / 7.0676 / 7.06
Grate Area (sq ft / m2)12 / 1.1216.80 / 1.5616.80 / 1.56
Evaporative Heating Surface (sq ft / m2)661 / 61.431084 / 100.741084 / 100.71
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)661 / 61.431084 / 100.741084 / 100.71
Evaporative Heating Surface/Cylinder Volume206.11294.44294.44
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation204030243024
Same as above plus superheater percentage204030243024
Same as above but substitute firebox area for grate area901013,68013,680
Power L1343658465846
Power MT463.78702.99633.85

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