United Fruit 2-6-0 Locomotives in Guatemala


Class Details by Steve Llanso of Sweat House Media

Class 12 (Locobase 12819)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 28, p. 83. Works numbers were 25985, 26076 in July 1905; 26283 in August; 26495 in September; 26927 in November; and 27020 in December.

These Moguls sported big fireboxes for the gauge and wheel arrangement, although the evaporative heating surface area was only moderate. They also carried a lot of adhesion weight.

Principal Dimensions by Steve Llanso of Sweat House Media

Class12
Locobase ID12819
RailroadUnited Fruit
CountryGuatemala
Whyte2-6-0
Number in Class6
Road Numbers12-17
Gauge3'
Number Built6
BuilderBurnham, Williams & Co
Year1905
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.50 / 3.51
Engine Wheelbase (ft / m)18.75 / 5.71
Ratio of driving wheelbase to overall engine wheelbase 0.61
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)68,000 / 30,844
Engine Weight (lbs / kg)78,000 / 35,380
Tender Loaded Weight (lbs / kg)52,000 / 23,587
Total Engine and Tender Weight (lbs / kg)130,000 / 58,967
Tender Water Capacity (gals / ML)2600 / 9.85
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)38 / 19
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 20" / 406x508
Tractive Effort (lbs / kg)16,320 / 7402.64
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.17
Heating Ability
Tubes (number - dia) (in / mm)160 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.56 / 2.91
Firebox Area (sq ft / m2)93.70 / 8.71
Grate Area (sq ft / m2)15.20 / 1.41
Evaporative Heating Surface (sq ft / m2)921 / 85.59
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)921 / 85.59
Evaporative Heating Surface/Cylinder Volume197.89
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2736
Same as above plus superheater percentage2736
Same as above but substitute firebox area for grate area16,866
Power L14299
Power MT418.13

All material Copyright © SteamLocomotive.com
Wes Barris