Usina Bom Jardim 2-4-2 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class Bom Jardim (Locobase 13979)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 44, p.159. Works numbers were 38345 in September 1912.

This little saddle-tanker was ordered by Senhor Bernardo Martins Catharino, whose sugar plantation lay in Bahia state in Brazil's Northeast.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassBom Jardim
Locobase ID13979
RailroadUsina Bom Jardim
CountryBrazil
Whyte2-4-2ST
Number in Class1
Road Numbers
GaugeMetre
Number Built1
BuilderBaldwin
Year1912
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 3.35
Engine Wheelbase (ft / m)19.79 / 7.98
Ratio of driving wheelbase to overall engine wheelbase 0.25
Overall Wheelbase (engine & tender) (ft / m)19.79 / 14.69
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)24,000 / 10,886
Engine Weight (lbs / kg)39,000 / 17,690
Tender Loaded Weight (lbs / kg) / 31,752
Total Engine and Tender Weight (lbs / kg)39,000 / 49,442
Tender Water Capacity (gals / ML)600 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)20 / 10
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)37 / 940
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)9" x 16" / 229x406
Tractive Effort (lbs / kg)4764 / 2160.92
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.04
Heating Ability
Tubes (number - dia) (in / mm)66 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.23 / 2.51
Firebox Area (sq ft / m2)40 / 3.72
Grate Area (sq ft / m2) 7.20 / 0.67
Evaporative Heating Surface (sq ft / m2)251 / 23.32
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)251 / 23.32
Evaporative Heating Surface/Cylinder Volume213.06
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1152
Same as above plus superheater percentage1152
Same as above but substitute firebox area for grate area6400
Power L13777
Power MT693.90

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