Data from 482 S 161 Order S-1976 (June 1945) builder's card supplied in February 2023 by Teemu Koivumaki. Works numbers 73717-73718 in 1945..
Like most metre-gauge engines in Brazil, these metre Mountains burned wood. In turn, that demanded large grates to provide enough heat for the relatively large boiler. A well-endowed superheater supported the class's power demand. (Baldwin supplied 4-8-2s of somewhat larger dimensions a year later--see Locobase 972.
The ROde de Viatpo Paraná-Santa Catharina (RVPSC).was formed in 1942 from the combination of predecessors Spo Paulo-Rio Grande Railway, Paraná Railway and Paraná Northern Railway.
Data from a table in 1947 Locomotive Cyclopedia; and Baldwin Locomotive Works Negative 13,018 Class 4-8-2, 19 S 67 supplied in March 2023 in an email from Teemu Koivumaki. Works numbers 71583-71586 in 1945 and 73066-73067 in 1946.
As with the FNP 4-8-2 (Locobase 971), note the very low boiler and grate demand factors, reflecting an engine with relatively small cylinder volume in these wood-burner Mountains. The cylinders were fed steam through 10" (254 mm) piston valves.
Locobase 21115 shows the smaller Alco meter-gauge Mountains produced a year earlier.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 705 | 720 |
Locobase ID | 21115 | 972 |
Railroad | Parana-Santa Catarina | Parana-Santa Catarina |
Country | Brazil | Brazil |
Whyte | 4-8-2 | 4-8-2 |
Number in Class | 2 | 6 |
Road Numbers | 705-706 | 720-725 |
Gauge | Metre | Metre |
Number Built | 2 | 6 |
Builder | Alco-Schenectady | Baldwin |
Year | 1945 | 1946 |
Valve Gear | Walschaert | Walschaert |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 12.50 / 3.81 | 12.50 / 3.81 |
Engine Wheelbase (ft / m) | 31.83 / 9.70 | 31.08 / 9.48 |
Ratio of driving wheelbase to overall engine wheelbase | 0.39 | 0.40 |
Overall Wheelbase (engine & tender) (ft / m) | 59.98 / 18.28 | 58.67 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 105,500 / 47,854 | 120,000 / 54,431 |
Engine Weight (lbs / kg) | 161,000 / 73,028 | 170,000 / 77,111 |
Tender Loaded Weight (lbs / kg) | 85,700 / 38,873 | 80,000 / 36,287 |
Total Engine and Tender Weight (lbs / kg) | 246,700 / 111,901 | 250,000 / 113,398 |
Tender Water Capacity (gals / ML) | 3700 | 3700 / 14.02 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 | 50 / 25 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 46 / 1168 | 46 / 1168 |
Boiler Pressure (psi / kPa) | 185 / 1280 | 224.80 / 1550 |
High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 22" / 508x559 | 19" x 22" / 483x559 |
Tractive Effort (lbs / kg) | 30,083 / 13645.44 | 32,990 / 14964.03 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.51 | 3.64 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 129 - 2" / 51 | 171 - 2" / 51 |
Flues (number - dia) (in / mm) | 22 - 5.375" / 137 | 34 - 5.5" / 140 |
Flue/Tube length (ft / m) | 19.08 / 5.82 | 18 / 5.49 |
Firebox Area (sq ft / m2) | 124 / 11.52 | 159 / 14.77 |
Grate Area (sq ft / m2) | 40.20 / 3.73 | 52 / 4.83 |
Evaporative Heating Surface (sq ft / m2) | 1994 / 185.25 | 2617 / 243.13 |
Superheating Surface (sq ft / m2) | 500 / 46.45 | 727 / 67.54 |
Combined Heating Surface (sq ft / m2) | 2494 / 231.70 | 3344 / 310.67 |
Evaporative Heating Surface/Cylinder Volume | 249.27 | 362.49 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 7437 | 11,690 |
Same as above plus superheater percentage | 8924 | 14,261 |
Same as above but substitute firebox area for grate area | 27,528 | 43,607 |
Power L1 | 12,613 | 23,765 |
Power MT | 1054.29 | 1746.43 |