Ferrocarril Dorado Beyer-Garratt Locomotives in Colombia

Class Details by Steve Llanso of Sweat House Media

Class 17 (Locobase 518)

Data from Gavin Hamilton's excellent compilation of Garratt data posted at [], first accessed 6 September 2005; and [] (31 December 2003); later revised to [], last accessed 1 October 2022; and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p 98.. Works numbers were 6843-6844 in 1937.

Hamilton noted that these Small Double Pacifics were the only Garratts to have been built for the metre gauge by Beyer, Peacock. Durrant described some details of construction, noting that the pair used bar frames and had the round-top boilers' fireboxes' direct heating surface area included that supplied by thermic syphons. They were to tackle the 1 in 50 (2%) grades encounterd between Marequita and Honda.

Both were withdrawn by 1955.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID518
RailroadFerrocarril Dorado
Number in Class2
Road Numbers17-18
Number Built2
BuilderBeyer, Peacock
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)22,400 / 10,160
Weight on Drivers (lbs / kg)134,176 / 60,861
Engine Weight (lbs / kg)263,424 / 119,487
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)263,424 / 119,487
Tender Water Capacity (gals / ML)4200 / 15.91
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)37 / 18.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40 / 1016
Boiler Pressure (psi / kPa)184.20 / 12.70
High Pressure Cylinders (dia x stroke) (in / mm)14" x 22" / 356x559 (4)
Tractive Effort (lbs / kg)33,756 / 15311.48
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.97
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)175 / 16.26
Grate Area (sq ft / m2)39 / 3.62
Evaporative Heating Surface (sq ft / m2)1575 / 146.32
Superheating Surface (sq ft / m2)270 / 25.08
Combined Heating Surface (sq ft / m2)1845 / 171.40
Evaporative Heating Surface/Cylinder Volume200.91
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation7184
Same as above plus superheater percentage8261
Same as above but substitute firebox area for grate area37,070
Power L17644
Power MT753.58

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