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 | |
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Class | 89/I |
Locobase ID | 2736 |
Railroad | Sao Paulo Railway |
Country | Brazil |
Whyte | 2-8-0 |
Number in Class | 10 |
Road Numbers | 89-91, 6, 8, 12, 21, 22, 68, 69/ I 60-69 |
Gauge | 5'3" |
Number Built | 10 |
Builder | North British |
Year | 1909 |
Valve Gear | Walschaert |
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 / 1410 |
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 Volume | 143.25 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 5828 |
Same as above plus superheater percentage | 6936 |
Same as above but substitute firebox area for grate area | 37,477 |
Power L1 | 9619 |
Power MT | 571.17 |