Uniao Mineira 4-4-0 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 11775)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 10. 258. Works number was 5980 in December 1881.

Principal Dimensions by Steve Llanso of Middle Run Media
Class7
Locobase ID11775
RailroadUniao Mineira
CountryBrazil
Whyte4-4-0
Number in Class1
Road Numbers7
GaugeMetre
Number Built1
BuilderBurnham, Williams & Co
Year1881
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.17 / 2.19
Engine Wheelbase (ft / m)18.25 / 5.56
Ratio of driving wheelbase to overall engine wheelbase 0.39
Overall Wheelbase (engine & tender) (ft / m)36.49 / 11.12
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)24,000 / 10,886
Engine Weight (lbs / kg)37,000 / 16,783
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)20 / 10
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)43 / 1092
Boiler Pressure (psi / kPa)130 / 900
High Pressure Cylinders (dia x stroke) (in / mm)12" x 16" / 305x406
Tractive Effort (lbs / kg)5921 / 2685.72
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.05
Heating Ability
Tubes (number - dia) (in / mm)113 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.65 / 2.64
Firebox Area (sq ft / m2)53 / 4.93
Grate Area (sq ft / m2) 9.10 / 0.85
Evaporative Heating Surface (sq ft / m2)440 / 40.89
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)440 / 40.89
Evaporative Heating Surface/Cylinder Volume210.08
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1183
Same as above plus superheater percentage1183
Same as above but substitute firebox area for grate area6890
Power L13136
Power MT576.14

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