Tropical Oil Company 0-4-0 Locomotives in Colombia


Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 15475)

Data from DeGolyer, Volume 79, pp. 703+. See also the account at [], last accessed 12 October 2013. Works number was 61940 in July 1936.

Minimum radius in the Barranca yard was 40.93 m (134.25 feet) or approx 43 1/2 degrees. Maximum grade awaiting this oil-burning switcher was 2% for 1 km (0.6 miles). A Baldwin standard oil burner mounted in the front end of the firebox burned "asphaltic base Colombian crude" with an API gravity rating of 20.8 at 60 degrees F (15.5 C).

Principal Dimensions by Steve Llanso of Middle Run Media

Class7
Locobase ID15475
RailroadTropical Oil Company
CountryColombia
Whyte0-4-0
Number in Class1
Road Numbers7
GaugeMetre
Number Built1
BuilderBaldwin
Year1936
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.50 / 1.68
Engine Wheelbase (ft / m) 5.50 / 1.68
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)23.65 / 7.21
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)37,500 / 17,010
Engine Weight (lbs / kg)37,500 / 17,010
Tender Loaded Weight (lbs / kg)26,500 / 12,020
Total Engine and Tender Weight (lbs / kg)64,000 / 29,030
Tender Water Capacity (gals / ML)1000 / 3.79
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)500 / 1892.50
Minimum weight of rail (calculated) (lb/yd / kg/m)31 / 15.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 838
Boiler Pressure (psi / kPa)165 / 11.40
High Pressure Cylinders (dia x stroke) (in / mm)11" x 16" / 279x406
Tractive Effort (lbs / kg)8228 / 3732.16
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.56
Heating Ability
Tubes (number - dia) (in / mm)113 - 1.752" / 45
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.50 / 2.59
Firebox Area (sq ft / m2)43 / 3.99
Grate Area (sq ft / m2) 7.60 / 0.71
Evaporative Heating Surface (sq ft / m2)468 / 43.48
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)468 / 43.48
Evaporative Heating Surface/Cylinder Volume265.93
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1254
Same as above plus superheater percentage1254
Same as above but substitute firebox area for grate area7095
Power L13522
Power MT414.12

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