Ilo a Moquegua 2-4-0 Locomotives in Peru


Class Details by Steve Llanso of Sweat House Media

Class Pacocha (Locobase 13472)

Data from DeGolyer, Volume 32, p. 250. See also Frederic M Halsey, Investments in Latin America and the British West Indies, Special Agents Series - No 169, United States Department of Commerce (Washington, DC: Government Printing Office,1918), p. 332. Works number was 32845 in July 1908.

The I a M encountered all the turmoil of the 19th Century in Peru. When it was completed in 1873, it linked the port of Ilo in Peru's far south on a 62-mile (100-km) line with the capital of Moquegua Department (also named Moquegua). The department's exports were wine, grapes, olives, figs, brandies, and other products. But the Chilean War of 1879-1883 forced its abandonment for more than 30 years.

Reopened in 1907 by the Peruvian Corporation under a 30-year lease, the railway began restocking and turned to Baldwin for this six-wheeler. The line's profile included rulling grades of 4 1/4%, 30 km (18.6 miles) of 3-4% grades, and curves mostly of 320-ft radii, but which included two of 280 feet.

The government, which actually rebuilt the line in 1909, took over the I-M at the end of 1915 and the 3 was taken onto the Tacna & Arica motive power roster as 3A.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassPacocha
Locobase ID13472
RailroadIlo a Moquegua
CountryPeru
Whyte2-4-0
Number in Class1
Road Numbers3
GaugeStd
Number Built1
BuilderBurnham, Williams & Co
Year1908
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.33 / 2.23
Engine Wheelbase (ft / m)14.67 / 4.47
Ratio of driving wheelbase to overall engine wheelbase 0.50
Overall Wheelbase (engine & tender) (ft / m)35.87 / 10.93
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)42,000 / 19,051
Engine Weight (lbs / kg)50,000 / 22,680
Tender Loaded Weight (lbs / kg)32,000 / 14,515
Total Engine and Tender Weight (lbs / kg)82,000 / 37,195
Tender Water Capacity (gals / ML)1600 / 6.06
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.40 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)35 / 17.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)160 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)13" x 20" / 330x508
Tractive Effort (lbs / kg)10,447 / 4738.69
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.02
Heating Ability
Tubes (number - dia) (in / mm)130 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.58 / 2.62
Firebox Area (sq ft / m2)61 / 5.67
Grate Area (sq ft / m2)13.80 / 1.28
Evaporative Heating Surface (sq ft / m2)567 / 52.68
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)567 / 52.68
Evaporative Heating Surface/Cylinder Volume184.54
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2208
Same as above plus superheater percentage2208
Same as above but substitute firebox area for grate area9760
Power L13330
Power MT349.59

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