FC del Sur 2-6-6-2 Locomotives in Colombia


Class Details by Steve Llanso of Sweat House Media

Class 9 (Locobase 4762)

Data from [], supplemented by DeGolyer, Vol 66, pp. 115+. Works numbers were 54857-54858 in June 1921.

Smallish metre-gauge articulated tank with a good degree of superheat and 8" (203 mm) piston valves. The two served the Sur on 60 lb/yard (30 kg/metre) rail that climbed 3% grades and went around curves as sharp as 262 feet (80 metres) or 22 degrees. At a later date, the pair went to the Norte and were renumbered 12-13.

Principal Dimensions by Steve Llanso of Sweat House Media

Class9
Locobase ID4762
RailroadFC del Sur
CountryColombia
Whyte2-6-6-2T
Number in Class2
Road Numbers9-10
Gaugemetre
Number Built2
BuilderBaldwin
Year1921
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.67 / 2.34
Engine Wheelbase (ft / m)23.33 / 7.11
Ratio of driving wheelbase to overall engine wheelbase 0.33
Overall Wheelbase (engine & tender) (ft / m)36.83 / 11.23
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)122,000 / 55,338
Engine Weight (lbs / kg)143,000 / 64,864
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)143,000 / 64,864
Tender Water Capacity (gals / ML)1800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.60 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)34 / 17
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)38 / 965
Boiler Pressure (psi / kPa)190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)13" x 20" / 330x508
Low Pressure Cylinders (dia x stroke) (in / mm)20.5" x 20" / 521x508
Tractive Effort (lbs / kg)20,490 / 9294.12
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.95
Heating Ability
Tubes (number - dia) (in / mm)68 - 2" / 51
Flues (number - dia) (in / mm)12 - 5.375" / 137
Flue/Tube length (ft / m)14 / 4.27
Firebox Area (sq ft / m2)67 / 6.22
Grate Area (sq ft / m2)24 / 2.23
Evaporative Heating Surface (sq ft / m2)797 / 74.04
Superheating Surface (sq ft / m2)212 / 19.70
Combined Heating Surface (sq ft / m2)1009 / 93.74
Evaporative Heating Surface/Cylinder Volume259.40
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4560
Same as above plus superheater percentage5518
Same as above but substitute firebox area for grate area15,403
Power L14788
Power MT519.13

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