Peruvian Corporation, Ltd 2-6-0 Locomotives in Peru

Class Details by Steve Llanso of Sweat House Media

Class Sojo (Locobase 15102)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 66, pp. 188. See also the Pearcedale Conservation Park Brief Historical Summary of the Railroads in Peru at []. Works number was 46969 in November 1917.

The concession awarded to the Peruvian Corp in March 1890 to cancel Peru's external debt amassed during its first attempts to build a railway infrastructure. A rescheduling in 1907 extended the concession for 17 years to 1973 in exchange for building three more railway lines--the Oroya-Huancayo, Sicuani-Cusco, and Yonan-Chilete--by September 1908.

By the time the PC took delivery of this small wood-burning Mogul, the corporation's railway-building years were over. The Sojo was built to travel on 45 lb/yard (22.5 kg/metre), climb 2 1/2-3% grades, and get around curves with radii of 320 feet (97.5 metres). A particular concern seems to have been the spacing between water stations, which was 21.75 miles (35 km). The amount of sand that drifted over the tracks prompted "Hereafter" notes about the crosshead shoe's metal, which the note recommended be changed from white metal to cast iron. But special steam pipes directed on the rail to blow the sand away were to be eliminated because they blew sand right into the bearings. Future locomotives were to be produced with Belpaire fireboxes.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID15102
RailroadPeruvian Corporation, Ltd
Number in Class1
Road Numbers8
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11 / 3.35
Engine Wheelbase (ft / m)19 / 5.79
Ratio of driving wheelbase to overall engine wheelbase 0.58
Overall Wheelbase (engine & tender) (ft / m)42.92 / 13.08
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)80,100 / 36,333
Engine Weight (lbs / kg)93,500 / 42,411
Tender Loaded Weight (lbs / kg)60,000 / 27,216
Total Engine and Tender Weight (lbs / kg)153,500 / 69,627
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)45 / 22.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)18,801 / 8528.00
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.26
Heating Ability
Tubes (number - dia) (in / mm)180 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.17 / 3.10
Firebox Area (sq ft / m2)92 / 8.55
Grate Area (sq ft / m2)16.60 / 1.54
Evaporative Heating Surface (sq ft / m2)1042 / 96.80
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1042 / 96.80
Evaporative Heating Surface/Cylinder Volume186.57
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2988
Same as above plus superheater percentage2988
Same as above but substitute firebox area for grate area16,560
Power L14034
Power MT333.09

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