FC del Sud de Buenos Aires 2-8-0 Locomotives in Argentina


Class Details by Steve Llanso of Sweat House Media

Class 11B (Locobase 4302)

Data from Carlos Alberto Fern+ndez Priotti in Bryan Attewell ([] Steam Locomotive simulator program (December 2000).

Virtually identical to the Class 8 Prairie tank series imported by this railroad in the same years. Like many British-built locomotives in Argentina, these were fitted with Belpaire boilers.

Apparently this Consolidation was just the right size (or price, or both) for the traffic, because Beyer Peacock, North British, and Vulcan in Britain and Henschel in Germany added to the stud over the next 18 years.

The Spanish-language website members.es.tripod.de/rielsud/locoayer.html (Dec 2001) notes that the first 60 supplemented in 1931 by an additional order for 40 to handle the rapid increase in traffic over the Sud's mainline. It's a little surprising to note that these low-drivered Consolidations established a monopoly on the passenger trains between Buenos Aires-La Plata and Bahia Blanca-Toay. Sometime later the entire class was converted to oil-burning.


Class Class 11D (Locobase 4303)

Data provided by Carlos Alberto Fern+ndez Priotti in Bryan Attewell ([] Steam Locomotive simulator program (Decemberl 2000).

Class 11 was a goods-engine catchall it appears, as this three-cylinder Consolidation class shares the main designation with a 2-8-0 design from fourteen years earlier and a twelve-wheeler delivered in the same years. In fact, this 2-8-0 seems a scaled-down version of the Mastodon, with a smaller, lower-pressure boiler driving the same piston volume and driver diameter.


Class unknown (Locobase 6370)

Data from Vulcan Foundry catalogue, ca. 1920, which doesn't say how many of these compounds were built or when.

They do resemble the 11Bs (Locobase 4302) enough for Locobase to suspect they were delivered at around the same time. See also Locobase 11230 for very similar locomotives supplied by Robert Stephenson to the Argentine Great Western in 1905-1906.

Principal Dimensions by Steve Llanso of Sweat House Media

Class11BClass 11Dunknown
Locobase ID4302 4303 6370
RailroadFC del Sud de Buenos Aires (FCS)FC del Sud de Buenos Aires (FCS)FC del Sud de Buenos Aires (FCS)
CountryArgentinaArgentinaArgentina
Whyte2-8-02-8-02-8-0
Number in Class1003511
Road Numbers4101-42004301-4335
Gauge5'6"5'6"5'6"
Number Built1003511
BuilderseveralArmstrong WhitworthVulcan Foundry
Year191319271902
Valve GearWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)15.33 / 4.6715.33 / 4.67
Engine Wheelbase (ft / m)24.08 / 7.34
Ratio of driving wheelbase to overall engine wheelbase 0.64
Overall Wheelbase (engine & tender) (ft / m)49.67 / 15.14
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)112,448 / 51,006135,520 / 61,471
Engine Weight (lbs / kg)132,160 / 59,947
Tender Loaded Weight (lbs / kg)95,760 / 43,436
Total Engine and Tender Weight (lbs / kg)227,920 / 103,383
Tender Water Capacity (gals / ML)2500 / 9.474200 / 15.91
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 7.70 / 7 7.80 / 7
Minimum weight of rail (calculated) (lb/yd / kg/m)47 / 23.5056 / 28
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)55.50 / 141055.50 / 141055.50 / 1410
Boiler Pressure (psi / kPa)162.40 / 11.20184.20 / 12.70204.50 / 14.10
High Pressure Cylinders (dia x stroke) (in / mm)19" x 26" / 483x66017.5" x 26" / 445x660 (3)19" x 26" / 483x660 (1)
Low Pressure Cylinders (dia x stroke) (in / mm)27.5" x 26" / 699x660 (1)
Tractive Effort (lbs / kg)23,345 / 10589.1333,694 / 15283.3619,898 / 9025.59
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.82 4.02
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.90 / 3.6314.40 / 4.39
Firebox Area (sq ft / m2)122.40 / 11.38
Grate Area (sq ft / m2)24.50 / 2.2828 / 2.6024.40 / 2.27
Evaporative Heating Surface (sq ft / m2)1249 / 116.081348 / 125.281532 / 142.38
Superheating Surface (sq ft / m2)251 / 23.33370 / 34.39
Combined Heating Surface (sq ft / m2)1500 / 139.411718 / 159.671532 / 142.38
Evaporative Heating Surface/Cylinder Volume146.39124.16359.11
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation397951584990
Same as above plus superheater percentage465562924990
Same as above but substitute firebox area for grate area25,031
Power L14538
Power MT

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