Agricola de Guatemala 2-8-2 Locomotives in Guatemala


Class Details by Steve Llanso of Sweat House Media

Class 157 (Locobase 15425)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 79, pp. 88+. See also J B West's blog A Life Wasted Chasing Trains, "Some history [relating to the IRCA] at [link]. Works numbers were 61991-61995 in April 1936.

Locobase assumes that the postwar orders were built to the same specifications as the 1936 engines. Except for slightly higher weights, the 1936 batch (157-161) were identical to the 150 and 151 of 1928 shown in Locobase 15424. West explains that soon after the International Railways of Central America (IRCA) reached its maximum length in 1929, the Great Depression rendered any attempt to gain long-term financing impossible and the company's plans for further expansion stalled.

By 1936, the IRCA sold out to United Fruit, which took a consistently profitable business and improved on it. Among other purchases, West notes, were these oil-burning Mikados that moved the "fruteros" (banana trains) through Guatemala.

But the CA of G was not a banana road, West adds; only 15-20% of the freight traffic related to bananas and this 2-8-2 design became the signature power. 30 more were ordered in the postwar years; see Locobase 5506.

Principal Dimensions by Steve Llanso of Middle Run Media
Class157
Locobase ID15425
RailroadAgricola de Guatemala
CountryGuatemala
Whyte2-8-2
Number in Class5
Road Numbers157-161
Gauge3'
Number Built5
BuilderBaldwin
Year1936
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12 / 3.66
Engine Wheelbase (ft / m)26.50 / 8.08
Ratio of driving wheelbase to overall engine wheelbase 0.45
Overall Wheelbase (engine & tender) (ft / m)52.29 / 15.94
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)110,000 / 49,895
Engine Weight (lbs / kg)145,000 / 65,771
Tender Loaded Weight (lbs / kg)78,000 / 35,380
Total Engine and Tender Weight (lbs / kg)223,000 / 101,151
Tender Water Capacity (gals / ML)3500 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)1500 / 5678
Minimum weight of rail (calculated) (lb/yd / kg/m)46 / 23
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40 / 1016
Boiler Pressure (psi / kPa)180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)18" x 22" / 457x559
Tractive Effort (lbs / kg)27,265 / 12367.21
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.03
Heating Ability
Tubes (number - dia) (in / mm)125 - 2" / 51
Flues (number - dia) (in / mm)24 - 5.375" / 137
Flue/Tube length (ft / m)15.50 / 4.72
Firebox Area (sq ft / m2)130 / 12.08
Grate Area (sq ft / m2)34 / 3.16
Evaporative Heating Surface (sq ft / m2)1668 / 155.02
Superheating Surface (sq ft / m2)420 / 39.03
Combined Heating Surface (sq ft / m2)2088 / 194.05
Evaporative Heating Surface/Cylinder Volume257.43
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6120
Same as above plus superheater percentage7344
Same as above but substitute firebox area for grate area28,080
Power L111,293
Power MT905.34

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