Gran Ferrocarril del Tachira 2-6-2 Locomotives in Venezuela


Class Details by Steve Llanso of Sweat House Media

Class Encontrador (Locobase 14195)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 49, p. 120. See also Centeno, Loynaz y Roncajolo: Ingenieros-arquitectos del Ferrocarril del Táchira, 1904-1926" at [], last accessed 29 August 2013. Works numbers were 40537-40538 in September 1913.

Located south and west of Lake Maracaibo, the Tachira was the other railway promoted by French-born Benito Roncajolo, whose GFC de la Ceiba is profiled in Locobase 15076. Of the two railways, this one was by far the longer, covering about 185 km (114.9 miles) in a northerly direction from Tachira to Encontrados.

The Tachira took delivery of these two wood-burning Prairie tanks, naming them Encontador and Maracaibo. The specs outlined challenges such as maximum grades of 2.7%, around curves of 100 metres/328 feet radii (17 1/2 degree curvature), on rails weighing 30, 40 and 50 lb/yard (15, 20, 25 kg/metre).

Principal Dimensions by Steve Llanso of Sweat House Media

ClassEncontrador
Locobase ID14195
RailroadGran Ferrocarril del Tachira
CountryVenezuela
Whyte2-6-2T
Number in Class2
Road Numbers8-9
GaugeMetre
Number Built2
BuilderBaldwin
Year1913
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)9 / 2.74
Engine Wheelbase (ft / m)21.33 / 6.50
Ratio of driving wheelbase to overall engine wheelbase 0.42
Overall Wheelbase (engine & tender) (ft / m)21.33 / 6.50
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)58,000 / 26,308
Engine Weight (lbs / kg)80,000 / 36,287
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)80,000 / 36,287
Tender Water Capacity (gals / ML)900 / 3.41
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)32 / 16
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40 / 1016
Boiler Pressure (psi / kPa)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)14" x 18" / 356x457
Tractive Effort (lbs / kg)12,745 / 5781.04
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.55
Heating Ability
Tubes (number - dia) (in / mm)140 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.67 / 2.64
Firebox Area (sq ft / m2)66 / 6.13
Grate Area (sq ft / m2)11.60 / 1.08
Evaporative Heating Surface (sq ft / m2)606 / 56.30
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)606 / 56.30
Evaporative Heating Surface/Cylinder Volume188.96
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1972
Same as above plus superheater percentage1972
Same as above but substitute firebox area for grate area11,220
Power L13308
Power MT377.22

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