International Petroleum Corporation 0-4-2 Locomotives in Peru


Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 15087)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 66, pp. 163. Works numbers were 54762-54764 in May 1921

After the first oil-burning tank arrived in 1919 (Locobase 15084), the IPC's L&PP company (an entity Locobase has not yet further identified) bought several more which differed only in higher weights on all axles. The pair that did not have a tender are shown in Locobase 15086.

This trio, delivered a year later, was delivered with two eight-wheel tenders associated with 10 and 11. 12 was outfitted with all the necessary connections to use either of the tenders . Fluids were divided between the side tanks (250 US gallons (946 litres) of water in each tank and 170 US gallons (643 litres) of oil at the rear of the frame) and the tender (1,200 US gallons (4,542 litres) of water, 500 gallons (1,892 litres) of oil).


Class 8 (Locobase 15086)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 66, pp. 166. Works numbers were 53304-53305 in June 1920 and and 57766-57767 in April 1924.

Following the single oil-burning tank supplied in 1919 to the L&PP Company (Locobase 15084), two more arrived a year later. They were essentially identical except for putting more weight on all three axles. The last pair in 1924 were duplicates.


Class unknown (Locobase 15085)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 66, pp. 163. Works number was 52791 in January 1921

After the first oil-burning tank arrived in 1919 (Locobase 15084), the IPC's L&PP company (an entity Locobase has not yet further identified) bought several more which differed only in higher weights on all axles. This set did not use a tender in addtion to the tanks, but those shown in Locobase 15086 did.

Principal Dimensions by Steve Llanso of Middle Run Media
Class108unknown
Locobase ID15087 15086 15085
RailroadInternational Petroleum CorporationInternational Petroleum CorporationInternational Petroleum Corporation
CountryPeruPeruPeru
Whyte0-4-2T0-4-2T0-4-2ST
Number in Class331
Road Numbers10-128-9, 14-15
Gauge2'6"2'6"2'6"
Number Built331
BuilderBaldwinBaldwinBaldwin
Year192119201920
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)4 / 1.224 / 1.224 / 1.22
Engine Wheelbase (ft / m)10.33 / 3.1510.33 / 3.1510.33 / 3.15
Ratio of driving wheelbase to overall engine wheelbase 0.39 0.39 0.39
Overall Wheelbase (engine & tender) (ft / m)10.33 / 3.1510.33 / 3.1510.33 / 3.15
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)25,300 / 11,47628,000 / 12,70125,300 / 11,476
Engine Weight (lbs / kg)31,000 / 14,06134,000 / 15,42231,000 / 14,061
Tender Loaded Weight (lbs / kg)27,800 / 12,610
Total Engine and Tender Weight (lbs / kg)58,800 / 26,67134,000 / 15,42231,000 / 14,061
Tender Water Capacity (gals / ML)1700 / 6.44500 / 1.89500 / 1.89
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)670 / 2536170 / 644170 / 644
Minimum weight of rail (calculated) (lb/yd / kg/m)21 / 10.5023 / 11.5021 / 10.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)30 / 76230 / 76230 / 762
Boiler Pressure (psi / kPa)160 / 1100160 / 1100160 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)9" x 14" / 229x3569" x 14" / 229x3569" x 14" / 229x356
Tractive Effort (lbs / kg)5141 / 2331.925141 / 2331.925141 / 2331.92
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.92 5.45 4.92
Heating Ability
Tubes (number - dia) (in / mm)74 - 1.5" / 3874 - 1.5" / 3874 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 6.71 / 2.05 6.71 / 2.05 6.71 / 2.05
Firebox Area (sq ft / m2)31.50 / 2.9331.30 / 2.9131.50 / 2.93
Grate Area (sq ft / m2) 8.05 / 0.75 8.05 / 0.75 8.05 / 0.75
Evaporative Heating Surface (sq ft / m2)225 / 20.91225 / 20.91225 / 20.91
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)225 / 20.91225 / 20.91225 / 20.91
Evaporative Heating Surface/Cylinder Volume218.27218.27218.27
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation128812881288
Same as above plus superheater percentage128812881288
Same as above but substitute firebox area for grate area504050085040
Power L1296829612968
Power MT517.26466.28517.26

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