Vera Cruz a Alvarado 4-4-0 Locomotives in Mexico


Class Details by Steve Llanso of Sweat House Media

Class Medellin (Locobase 12277)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 21, p. 196. Works number was 15985 in June 1898.

About-average size wood-burning Eight-wheeler for the 3-foot gauge. Compared to other locomotives on the line, this was the leading passenger locomotive. When the FC de Vera Cruz stood up in 1914, it renumbered the 7 as their 2.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassMedellin
Locobase ID12277
RailroadVera Cruz a Alvarado
CountryMexico
Whyte4-4-0
Number in Class1
Road Numbers4 / 7 / 2
Gauge3'
Number Built1
BuilderBurnham, Williams & Co
Year1898
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.17 / 2.49
Engine Wheelbase (ft / m)20.08 / 6.12
Ratio of driving wheelbase to overall engine wheelbase 0.41
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)38,000 / 17,237
Engine Weight (lbs / kg)56,000 / 25,401
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1600 / 6.06
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)32 / 16
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)160 / 970
High Pressure Cylinders (dia x stroke) (in / mm)14" x 18" / 356x457
Tractive Effort (lbs / kg)10,431 / 4731.43
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.64
Heating Ability
Tubes (number - dia) (in / mm)162 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.58 / 2.92
Firebox Area (sq ft / m2)73 / 6.78
Grate Area (sq ft / m2)10.10 / 0.94
Evaporative Heating Surface (sq ft / m2)780 / 72.49
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)780 / 72.49
Evaporative Heating Surface/Cylinder Volume242.99
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1616
Same as above plus superheater percentage1616
Same as above but substitute firebox area for grate area11,680
Power L14375
Power MT507.64

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