Porto Alegre a Novo Hamburgo 4-4-0 Locomotives in Brazil

Class Details by Steve Llanso of Sweat House Media

Class Navegantes (Locobase 20102)

Data from Lionel Wiener, "Locomotives of the Rio Grande do Sul", Locomotive Magazine, Volume 18 (15 July 1912), pp. 257-258. Works number was 3368 in 1896.

This Eight-wheeled tank featured some changes from the earlier PA&NH locomotives. Most notable was the adoption of the external radial valve gear.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20102
RailroadPorto Alegre a Novo Hamburgo
Number in Class1
Road Numbers7
Number Built1
BuilderDubs & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.68
Engine Wheelbase (ft / m)15.31 / 2.95
Ratio of driving wheelbase to overall engine wheelbase 0.33
Overall Wheelbase (engine & tender) (ft / m)15.31 / 2.95
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)40,320 / 14,225
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)40,320 / 14,225
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 1524
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)12" x 18" / 305x457
Tractive Effort (lbs / kg)5875 / 2664.86
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm) / 32
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) / 2.54
Firebox Area (sq ft / m2)134 / 12.45
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)546 / 50.72
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)546 / 50.72
Evaporative Heating Surface/Cylinder Volume231.73
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area21,440
Power L18257
Power MT

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