Buenos Ayres Central 4-6-0 Locomotives in Argentina


Class Details by Steve Llanso of Sweat House Media

Class 206 (Locobase 13244)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 34, p.340. Works numbers were 34077 in November 1909 and 36095 in February 1911.

The weight problem this Ten-wheeler posed for the Entre Rios in their first locomotives clearly did not go away. Although 5 were ordered in 1908 (Locobase 12907), a sixth was diverted from the ER to the FCCBA and another of identical design a year or so later. Compared to the 1908 trio delivered to the FCCBA, these locomotives had 8 fewer tubes, but was otherwise quite similar.

Note that the specs included extracts from the Law and General Regulations of the National Railroads of Argentina that governed the types and data concerning locomotives and tenders.


Class 24 (Locobase 13242)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p.147. See also Stephen H M Killik, Manual of Argentine Railways for 1908 (London: Effingham Wilson, 1908), pp. 31- 33. Works numbers were 32580-32582 in January 1908.

The CBA was built on light rails at the turn of the 20th Century. The 1908 version still ran on 47-lb/yard (23.5-kg/metre) rail. The main line ran from Buenos Aires to Salto, 108 miles to the west and an extension of 30 miles to Rojas was under construction. The Zarate branch ran from a point 35 miles west of the capital to the Parana River.


Class 24 (Locobase 13243)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 31, p.147. See also Stephen H M Killik, Manual of Argentine Railways for 1908 (London: Effingham Wilson, 1908), pp. 31- 33. Works numbers were 32580-32582 in January 1908.

The CBA was built on light rails at the turn of the 20th Century. The 1908 version still ran on 47-lb/yard (23.5-kg/metre) rail. The main line ran from Buenos Aires to Salto, 108 miles to the west and an extension of 30 miles to Rojas was under construction. The Zarate branch ran from a point 35 miles west of the capital to the Parana River.

Principal Dimensions by Steve Llanso of Middle Run Media
Class2062424
Locobase ID13244 13242 13243
RailroadBuenos Ayres Central (FCCBA)Buenos Ayres Central (FCCBA)Buenos Ayres Central (FCCBA)
CountryArgentinaArgentinaArgentina
Whyte4-6-04-6-04-6-0
Number in Class133
Road Numbers20624-2624-26
GaugeStdStdStd
Number Built133
BuilderBaldwinBurnham, Williams & CoBurnham, Williams & Co
Year190919081908
Valve GearWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.0510.50 / 3.2010.50 / 3.20
Engine Wheelbase (ft / m)20 / 6.1020.58 / 6.2720.58 / 6.27
Ratio of driving wheelbase to overall engine wheelbase 0.50 0.51 0.51
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)72,000 / 32,65984,000 / 38,10284,000 / 38,102
Engine Weight (lbs / kg)97,000 / 43,999107,000 / 48,534107,000 / 48,534
Tender Loaded Weight (lbs / kg)84,000 / 38,10296,000 / 43,54596,000 / 43,545
Total Engine and Tender Weight (lbs / kg)181,000 / 82,101203,000 / 92,079203,000 / 92,079
Tender Water Capacity (gals / ML)4200 / 15.914800 / 18.184800 / 18.18
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)7 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)40 / 2047 / 23.5047 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 142256 / 142256 / 1422
Boiler Pressure (psi / kPa)170 / 1170170 / 1170170 / 1170
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x61017" x 24" / 432x61017" x 24" / 432x610
Tractive Effort (lbs / kg)17,897 / 8117.9517,897 / 8117.9517,897 / 8117.95
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.02 4.69 4.69
Heating Ability
Tubes (number - dia) (in / mm)190 - 2" / 51198 - 2" / 51198 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.52 / 3.5112.25 / 3.7312.25 / 3.73
Firebox Area (sq ft / m2)99.50 / 9.24116.80 / 10.85116.80 / 10.85
Grate Area (sq ft / m2)20.20 / 1.8821.20 / 1.9721.20 / 1.97
Evaporative Heating Surface (sq ft / m2)1237 / 114.921378 / 128.021378 / 128.02
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1237 / 114.921378 / 128.021378 / 128.02
Evaporative Heating Surface/Cylinder Volume196.19218.56218.56
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation343436043604
Same as above plus superheater percentage343436043604
Same as above but substitute firebox area for grate area16,91519,85619,856
Power L1436549374937
Power MT400.97388.72388.72

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