FC Rosario a Puerto Belgrano 4-4-0 Locomotives in Argentina

Class Details by Steve Llanso of Sweat House Media

Class 21 (Locobase 3738)

Data provided by Carlos Alberto Fernández Priotti in Bryan Attewell ([] Steam Locomotive simulator program (April 2000).

Fernandez says these engines were based on the Outrances that ran on the Nord in France. Their place in Argentine rail history is secured by the fact that they introduced the use of the Schmidt superheater.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID3738
RailroadFC Rosario a Puerto Belgrano (FCRPB)
Number in Class12
Road Numbers21-32
Number Built12
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.86 / 2.70
Engine Wheelbase (ft / m)23.95 / 7.30
Ratio of driving wheelbase to overall engine wheelbase 0.37
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)70,548 / 32,000
Engine Weight (lbs / kg)109,790 / 49,800
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)4401 / 16.67
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 6.60 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)59 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72.80 / 1850
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)19.69" x 25.59" / 500x650
Tractive Effort (lbs / kg)20,156 / 9142.62
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.50
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.09 / 3.99
Firebox Area (sq ft / m2)128.85 / 11.97
Grate Area (sq ft / m2)24.22 / 2.25
Evaporative Heating Surface (sq ft / m2)1338 / 124.26
Superheating Surface (sq ft / m2)371 / 34.48
Combined Heating Surface (sq ft / m2)1709 / 158.74
Evaporative Heating Surface/Cylinder Volume148.36
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4214
Same as above plus superheater percentage5141
Same as above but substitute firebox area for grate area27,352
Power L112,457
Power MT778.56

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