Paulista 2-8-8-2 Locomotives in Brazil

Class Details by Steve Llanso of Sweat House Media

Class 89 (Locobase 4434)

Data from (revisited 20 February 2003) reproduction of extensive table. See also Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 44, p. 28. (Thanks to Teemu Koivumaki for his 6 July 2020 email correcting the road number on this Baldwin product.) Works number was 53133 in March 1913.

The Paulista advised Eddystone that "particular attention" should be paid to "design, material, and workmanship as engine is to work in direct competition as similar engine [road number 90, later 770] ordered at the same time from the American Locomotive Company."

Consolidation Mallet with a large boiler over relatively small driving wheel sets. Combustion chamber contributed 47 sq ft (4.37 sq m) to the direct heating surface area.

(Baldwin's specification doesn't say, but it appears its evaporative heating surface area--2,265 sq ft/210.42 sq m--was measured using the inside (fire side) tube and flue diameters. The result was 8% less than Locobase's specification, which uses the external diameters given in the specs.)

The two high-pressure cylinders used 10" (254 mm) piston valves to send steam to the cylinders. The two LP cylinders had Baldwin double-ported slide valves.

The Baldwin specs describe the right of way with great precision. Rail weight was 25 kg/metre (50 lb/yard), tie spacing came to 1,600 per km (2,576 per mile), curve radii down to 150 metres (492 ft). The Hassler speed recorder supplied with the engine was set for a maximum speed of 30 kph (19 mph).

Hitherto unsuspected limitation: "number of curves on which train can be running at any one time - 3". And a "Hereafter" note in the specs revealed yet another limitation. A 30 September 1913 letter from F W Degers "stated that engine and truck spring links were lengthened 2" [50.8 mm] as originally made caught on crosstie."

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID4434
Number in Class1
Road Numbers89/780
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)22.50 / 6.86
Engine Wheelbase (ft / m)43.33 / 13.21
Ratio of driving wheelbase to overall engine wheelbase 0.52
Overall Wheelbase (engine & tender) (ft / m)67.75 / 20.65
Axle Loading (Maximum Weight per Axle) (lbs / kg)24,640 / 11,177
Weight on Drivers (lbs / kg)187,700 / 85,139
Engine Weight (lbs / kg)209,432 / 94,997
Tender Loaded Weight (lbs / kg)90,800 / 41,186
Total Engine and Tender Weight (lbs / kg)300,232 / 136,183
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)8 / 7
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 1067
Boiler Pressure (psi / kPa)204.50 / 14.10
High Pressure Cylinders (dia x stroke) (in / mm)19" x 22" / 483x559
Low Pressure Cylinders (dia x stroke) (in / mm)29" x 22" / 737x559
Tractive Effort (lbs / kg)45,995 / 20863.01
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Tubes (number - dia) (in / mm)150 - 2.25" / 57
Flues (number - dia) (in / mm)21 - 5.375" / 137
Flue/Tube length (ft / m)19.33 / 5.89
Firebox Area (sq ft / m2)184 / 17.09
Grate Area (sq ft / m2)44.50 / 4.13
Evaporative Heating Surface (sq ft / m2)2463 / 228.82
Superheating Surface (sq ft / m2)485 / 45.06
Combined Heating Surface (sq ft / m2)2948 / 273.88
Evaporative Heating Surface/Cylinder Volume341.16
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation9100
Same as above plus superheater percentage10,556
Same as above but substitute firebox area for grate area43,648
Power L16595
Power MT619.69

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