Industrial E de F de Perus-Pirapora 2-4-2 Locomotives in Brazil

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 20970)

Data from Roy V Wright, Fig. 2172, Locomotive Cyclopedia of American Practice, Tenth Edition (New York: Simmons-Boardman Publishing Corporation, 1938), p. 976. See also James Waite, "A Historical Account of the Perus-Pirapora Railway " on the InternationalSteam website at []; and at [], both last accessed 2 January 2022. Cooke works numbers were 66404-66405 in July 1925, 66936 in July 1926. Schenectady added works number 68037 in June 1926 and Montreal Locomotive Works completed the quintet with 68633 in December 1932.

Brazilian Portland Cement Company operated this 19 km railway that is further described in Locobase 13867. In 1925, the company ordered the first three oil-burning saddle-tank locomotives from Alco's Paterson, NJ Cooke Works as the first tank engines for the P-P. Two more arrived over the next seven years.

They must have proved well-suited to the work as all five served the company until 1967 when the entire stud went quiet. In January 2011, volunteers completed the 2's restoration to operational service

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20970
RailroadIndustrial E de F de Perus-Pirapora
Number in Class5
Road Numbers1-5
Gauge60 cm
Number Built5
BuilderAlco - multiple works
Valve GearBaker
Locomotive Length and Weight
Driver Wheelbase (ft / m) 4.50 / 1.37
Engine Wheelbase (ft / m)16.83 / 5.13
Ratio of driving wheelbase to overall engine wheelbase 0.27
Overall Wheelbase (engine & tender) (ft / m)16.83 / 5.13
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)26,500 / 12,020
Engine Weight (lbs / kg)35,000 / 15,876
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)35,000 / 15,876
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)22 / 11
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)27 / 686
Boiler Pressure (psi / kPa)175 / 12.10
High Pressure Cylinders (dia x stroke) (in / mm)9" x 14" / 229x356
Tractive Effort (lbs / kg)6248 / 2834.05
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.24
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)27 / 2.51
Grate Area (sq ft / m2) 5.50 / 0.51
Evaporative Heating Surface (sq ft / m2)218 / 20.25
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)218 / 20.25
Evaporative Heating Surface/Cylinder Volume211.48
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation963
Same as above plus superheater percentage963
Same as above but substitute firebox area for grate area4725
Power L12697
Power MT448.74

All material Copyright ©
Wes Barris