Sao Paulo Railway 0-4-0 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class Tatu (Locobase 10420)

Data from "Locomotives of the Sao Paulo Railway," The Locomotive Magazine, Volume IX [9] (19 December 1903), p. 356. Boiler pressure is an estimate.Works numbers were 3385 in 1887.

Tatu means "armadillo", which vividly described the pudgy dimensions of this small saddle-tank design.

NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface

Principal Dimensions by Steve Llanso of Sweat House Media

ClassTatu
Locobase ID10420
RailroadSao Paulo Railway
CountryBrazil
Whyte0-4-0ST
Number in Class1
Road Numbers5
Gauge5'3"
Number Built1
BuilderSharp, Stewart
Year1887
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.25 / 2.21
Engine Wheelbase (ft / m) 7.25 / 2.21
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m) 7.25 / 2.21
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)480 / 1.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)49 / 1245
Boiler Pressure (psi / kPa)140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)14" x 20" / 356x508
Tractive Effort (lbs / kg)9520 / 4318.20
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)130 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.50 / 3.20
Firebox Area (sq ft / m2)54.20 / 5.04
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)752 / 69.89
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)752 / 69.89
Evaporative Heating Surface/Cylinder Volume211.04
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area7588
Power L13282
Power MT

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