Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] (6 September 2005); and "Buenos Aires Great Southern Railway -Design 1131", Beyer-Garrrat Patent Articulated Locomotives (Manchester, England: Beyer-Peacock & Company Limited, 1931), archived on flickr's Historical Railway Images at [], pp. 74-75. 30.Wiener gives the grate area as 30 sq ft. And from Coronel Gustavo Adolfo Tama'o, "Las Locomotoras Garratt en Argentina," in PDF. Works numbers were 6417-6428 in 1928.
Small, Belpaire-boilered, oil-burning Double Mountain Garratts that operated from Bahia Blanca to Zapala, which offered a combination of relatively level ground and a 1 1/4% ruling grade over 40 miles.
Railroad was later part of Ferrocarril General Roca.
The Spanish-language website members.es.tripod.de/rielsud/locoayer.html (Dec 2001) says that their low axle weight destined them for those lines that were in poor condition. Increased grain traffic in the Bahia Blanca y Noroeste (BBNO), especially up the Toay branch, couldn't be hauled by the 11C class because of their high axle weight, so the Class 14s took over the work. The highly abrasive sand and grit in the region demanded extensive maintenance, but overall the engines were quite satisfactory.
The Sud's only Garratts carried on only into the late 1940s when a rapid decline in freight traffic and competition from trucks led to their redundancy.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | Class 14 |
Locobase ID | 531 |
Railroad | FC del Sud de Buenos Aires (FCS) |
Country | Argentina |
Whyte | 4-8-2+2-8-4 |
Number in Class | 12 |
Road Numbers | 4851-4862 |
Gauge | 5'6" |
Number Built | 12 |
Builder | Beyer, Peacock |
Year | 1928 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 20.50 / 6.25 |
Engine Wheelbase (ft / m) | 61 / 18.59 |
Ratio of driving wheelbase to overall engine wheelbase | 0.34 |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 28,448 / 12,904 |
Weight on Drivers (lbs / kg) | 226,912 / 102,926 |
Engine Weight (lbs / kg) | 369,824 / 167,750 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | 369,824 / 167,750 |
Tender Water Capacity (gals / ML) | 5520 / 20.91 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2590 / 2354.50 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 47 / 23.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 55.50 / 1410 |
Boiler Pressure (psi / kPa) | 204.50 / 1410 |
High Pressure Cylinders (dia x stroke) (in / mm) | 17.5" x 25" / 445x635 (4) |
Tractive Effort (lbs / kg) | 47,958 / 21753.41 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.73 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 223 - 1.875" / 48 |
Flues (number - dia) (in / mm) | 36 - 5.25" / 133 |
Flue/Tube length (ft / m) | 13 / 3.96 |
Firebox Area (sq ft / m2) | 204 / 18.95 |
Grate Area (sq ft / m2) | 44.20 / 4.11 |
Evaporative Heating Surface (sq ft / m2) | 2207 / 205.04 |
Superheating Surface (sq ft / m2) | 442 / 41.06 |
Combined Heating Surface (sq ft / m2) | 2649 / 246.10 |
Evaporative Heating Surface/Cylinder Volume | 158.56 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 9039 |
Same as above plus superheater percentage | 10,576 |
Same as above but substitute firebox area for grate area | 48,810 |
Power L1 | 9791 |
Power MT | 761.02 |