Rio Port Works 2-4-4 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 13862)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 39, p. 225. Works numbers were 35597-35598 in March 1911.

This pair of 10-wheeled tanks was pretty small for the gauge. Two more broad-gaugers shown in Locobase 13863 weren't much bigger.


Class 51 (Locobase 13863)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 39, p. 225. Works numbers were 35597-35598 in November 1910.

Locobase 13862 shows the metre-gauge tanks that worked at the Obras do Porto in Rio. The current pair straddled a considerably wider gauge and were commensurately bigger.

Principal Dimensions by Steve Llanso of Sweat House Media

Class251
Locobase ID13862 13863
RailroadRio Port Works (Obras do Porto)Rio Port Works (Obras do Porto)
CountryBrazilBrazil
Whyte2-4-4T2-4-4T
Number in Class22
Road Numbers2-351-52
GaugeMetre5'3"
Number Built22
BuilderBaldwinBaldwin
Year19101911
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.52 6.50 / 1.98
Engine Wheelbase (ft / m)21.67 / 6.6125.75 / 7.85
Ratio of driving wheelbase to overall engine wheelbase 0.23 0.25
Overall Wheelbase (engine & tender) (ft / m)21.67 / 6.6125.75 / 7.85
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)20,000 / 907243,000 / 19,504
Engine Weight (lbs / kg)40,000 / 18,14471,500 / 32,432
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)40,000 / 18,14471,500 / 32,432
Tender Water Capacity (gals / ML)500 / 1.89700 / 2.65
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)17 / 8.5036 / 18
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)37 / 94046 / 1168
Boiler Pressure (psi / kPa)160 / 11160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)9" x 16" / 229x40612" x 20" / 305x508
Tractive Effort (lbs / kg)4764 / 2160.928515 / 3862.34
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.20 5.05
Heating Ability
Tubes (number - dia) (in / mm)76 - 1.5" / 3898 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.67 / 2.6410.08 / 3.07
Firebox Area (sq ft / m2)42 / 3.9065 / 6.04
Grate Area (sq ft / m2) 6.50 / 0.6012.90 / 1.20
Evaporative Heating Surface (sq ft / m2)298 / 27.68578 / 53.70
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)298 / 27.68578 / 53.70
Evaporative Heating Surface/Cylinder Volume252.95220.78
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10402064
Same as above plus superheater percentage10402064
Same as above but substitute firebox area for grate area672010,400
Power L142554231
Power MT938.07433.85

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