Unspecified 4-6-2 Locomotives in Argentina


Class Details by Steve Llanso of Sweat House Media

Class E Ramos Mejias (Locobase 20189)

Data from "Catalogue No. 10036--Locomotives for Export", American Locomotive Company (New York City: American Locomotive Company (April 1910)., pp. 17-19, 23-26.

Alco's illustration shows a locomotive with "American Locomotive Company" on the tender and "E. Ramos Mejia" under the cab window. The locomotive's name almost certainly refers to Eziquiel Ramos Mejia, minister of public works under successive administrations from 1906-1913.

The only Alco production Pacifics shown with 19 x 26 cylinders and 54" drivers were four for the Rio Grande do Sol in 1920.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassE Ramos Mejias
Locobase ID20189
Railroad
CountryArgentina
Whyte4-6-2
Number in Class4
Road Numbers
GaugeMetre
Number Built4
BuilderAlco
Year
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.50 / 2.90
Engine Wheelbase (ft / m)26.50 / 8.08
Ratio of driving wheelbase to overall engine wheelbase 0.36
Overall Wheelbase (engine & tender) (ft / m)52.81 / 16.10
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)87,700 / 39,780
Engine Weight (lbs / kg)133,500 / 60,555
Tender Loaded Weight (lbs / kg)96,000 / 43,545
Total Engine and Tender Weight (lbs / kg)229,500 / 104,100
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)11 / 10
Minimum weight of rail (calculated) (lb/yd / kg/m)49 / 24.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)19" x 26" / 483x660
Tractive Effort (lbs / kg)23,639 / 10722.48
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.71
Heating Ability
Tubes (number - dia) (in / mm)146 - 2" / 51
Flues (number - dia) (in / mm)18 - 5.25" / 133
Flue/Tube length (ft / m)15.73 / 4.79
Firebox Area (sq ft / m2)102 / 9.48
Grate Area (sq ft / m2)27.80 / 2.58
Evaporative Heating Surface (sq ft / m2)1683 / 156.36
Superheating Surface (sq ft / m2)311 / 28.89
Combined Heating Surface (sq ft / m2)1994 / 185.25
Evaporative Heating Surface/Cylinder Volume197.25
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4448
Same as above plus superheater percentage5160
Same as above but substitute firebox area for grate area18,931
Power L18425
Power MT635.37

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