Sao Paulo Railway 2-8-0 Locomotives in Brazil

Class Details by Steve Llanso of Sweat House Media

Class 89/I (Locobase 2736)

Data from "Consolidation Locomotive, San [sic] Paulo (Brazilian) Ry", The Locomotive Magazine, Volume XV [15] (15 December 1909), p. 224. (Thanks to Teemu Koivumaki whose 2023 email included a comprehensive spreadsheet of Brazilian steam locomotive builders, works numbers, and owners.) Works numbers were 18908-18917 in 1909.

Similar to the Pacific built for the Sao Paolo at the same time and by the same works, this design, built to specifications supplied by Charles H Fox, the SPR's consulting engineer, also used a Belpaire boiler with side-by-side safety valves. The outside valves and cylinders used Walschaert's constant-lead radial valve gear. Each cylinder had a bypass valve to allow equalization of pressure at both ends when the locomotive was drifting with its steam supply shut off.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID2736
RailroadSao Paulo Railway
Number in Class10
Road Numbers89-91, 6, 8, 12, 21, 22, 68, 69/ I 60-69
Number Built10
BuilderNorth British
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)16.25
Engine Wheelbase (ft / m)24
Ratio of driving wheelbase to overall engine wheelbase 0.68
Overall Wheelbase (engine & tender) (ft / m)47.45
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)148,512
Engine Weight (lbs / kg)167,440
Tender Loaded Weight (lbs / kg)78,736
Total Engine and Tender Weight (lbs / kg)246,176
Tender Water Capacity (gals / ML)3600
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.40
Minimum weight of rail (calculated) (lb/yd / kg/m)62 / 31
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)204.50 / 14.10
High Pressure Cylinders (dia x stroke) (in / mm)21.5" x 26" / 546x660
Tractive Effort (lbs / kg)38,687 / 17548.15
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.84
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)154
Grate Area (sq ft / m2)28.50
Evaporative Heating Surface (sq ft / m2)1565 / 145.45
Superheating Surface (sq ft / m2)375 / 34.85
Combined Heating Surface (sq ft / m2)1940 / 180.30
Evaporative Heating Surface/Cylinder Volume143.25
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5828
Same as above plus superheater percentage6936
Same as above but substitute firebox area for grate area37,477
Power L19619
Power MT571.17

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