Dona Thereza Christina 2-4-2 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class Lauro Muller (Locobase 12986)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 29, p. 118. Works number was 28441 in June 1906.

Principal Dimensions by Steve Llanso of Middle Run Media

ClassLauro Muller
Locobase ID12986
RailroadDona Thereza Christina
CountryBrazil
Whyte2-4-2T
Number in Class1
Road Numbers
GaugeMetre
Number Built1
BuilderBaldwin
Year1912
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.52
Engine Wheelbase (ft / m)18.50 / 5.64
Ratio of driving wheelbase to overall engine wheelbase 0.27
Overall Wheelbase (engine & tender) (ft / m)18.50 / 5.64
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)29,000 / 13,154
Engine Weight (lbs / kg)45,000 / 20,412
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)45,000 / 20,412
Tender Water Capacity (gals / ML)550 / 2.08
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)24 / 12
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41 / 1041
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)11" x 16" / 279x406
Tractive Effort (lbs / kg)7225 / 3277.21
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.01
Heating Ability
Tubes (number - dia) (in / mm)91 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.12 / 2.47
Firebox Area (sq ft / m2)51.50 / 4.79
Grate Area (sq ft / m2) 8.72 / 0.81
Evaporative Heating Surface (sq ft / m2)340 / 31.60
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)340 / 31.60
Evaporative Heating Surface/Cylinder Volume193.20
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1570
Same as above plus superheater percentage1570
Same as above but substitute firebox area for grate area9270
Power L14176
Power MT634.93

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