Inspectoria Federal de Obras Contra As Secas 4-6-0 Locomotives in Brazil

Class Details by Steve Llanso of Sweat House Media

Class 109 (Locobase 15185)

Data from DeGolyer, Vol 66 pp. 369+. Works numbers were 55423-55424 in May 1922.

The IFOCS built and maintained many water projects to encourage irrigation in Brazil's relatively dry northeast. Many of their locomotives were lettered for the Inspectorate, but operated on other roads. These two wood-burning Ten-wheelers were run by railways with long names. The 109 ran on the E de F de Penetracao de Paranaiba (Limite de Alagoa Granda de Pagos).

The 110 was delivered to the E de F de Limoeiro a Umbuzeiro, which connected the Paranaiban town of Limoeiro with the Pernambuco border town of Umuzeiro about 40 km (24.8 miles) away. Grades inclined to as much as 2 1/2% and curves had radii as tight as 250 feet (76.2 metres).

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID15185
RailroadInspectoria Federal de Obras Contra As Secas
Number in Class2
Road Numbers109-110
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.83 / 2.39
Engine Wheelbase (ft / m)17.17 / 5.23
Ratio of driving wheelbase to overall engine wheelbase 0.46
Overall Wheelbase (engine & tender) (ft / m)44.71 / 13.63
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)65,000 / 29,484
Engine Weight (lbs / kg)79,000 / 35,834
Tender Loaded Weight (lbs / kg)55,000 / 24,948
Total Engine and Tender Weight (lbs / kg)134,000 / 60,782
Tender Water Capacity (gals / ML)2500 / 9.47
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)36 / 18
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)43 / 1092
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x508
Tractive Effort (lbs / kg)14,233 / 6455.99
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.57
Heating Ability
Tubes (number - dia) (in / mm)130 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)15 / 4.57
Firebox Area (sq ft / m2)70 / 6.50
Grate Area (sq ft / m2)21 / 1.95
Evaporative Heating Surface (sq ft / m2)1086 / 100.89
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1086 / 100.89
Evaporative Heating Surface/Cylinder Volume265.49
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3360
Same as above plus superheater percentage3360
Same as above but substitute firebox area for grate area11,200
Power L14025
Power MT409.55

All material Copyright ©
Wes Barris