Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 17, p. 248. Works numbers were 12644, 12656, 12666 in May 1892.
Names for these Vauclain compound Eight-wheelers were Joaquim Castro, Hermilio Alves, and Alberto Isaacson. They had 6 1/8"(155 mm) piston valves.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 32, p 264. Works numbers were 32877-32878 in July 1908, 38007-38009 in July 1912.
Ordered at the same time as the pair of Consolidations, this set of Eight-wheelers was bound for passenger service. Its drivers were of the same diameter, but the engine had less cylinder volume. The specs reflect the differences. Its average speed was to be 19 mph and it was to pull 80 trailing long tons up a 2 1/2% grade and around 230-ft radius curves.
Their railway would be combined and renamed several times, first to the Rede Mineira de Viacao (RMdeV) in 1931, then the Vasconcelandia Curtiba (VFCO) in 1955.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 20, p 133. Works number was 14820-14821 in May 1896.
These two Eight-wheelers (#8 bore the name Francisco de Sa) were built at the same time as the 2-8-0 described in Locobase 12197, but were considerably smaller. Locobase finds it curious that the specs for this locomotive are so ...specific about the tonnage ratings for these relatively puny engines and do not describe similar expectations for the Consolidation.
On the level, the 4-4-0 was expected to pull 650 tons. Up a 1/2% grade, the load drops to 252 tons, 1% means 148 tons, 1 1/2% 103 tons, 2% 73 tons; 2 1/2% 65 tons, and 3% 43 tons. Rail weight was given as 50 lb/yard.
Data from DeGolyer, Volume 18, p. 161. Works numbers were 13240, 13246 in February 1893.
Locomotives of nearly every kind would use Vauclain's four-cylinder compound design. But few if any would use such small (7"/179 mm) piston valves to supply steam to each pair of 1 HP and 1 LP cylinders. The second locomotive was named Emilia Rocha.
Baldwin's specification contained the railway's request to increase the weight to 40,000 lb, if possible and to fit "heavy" components such as footplates, running boards, equalizing beams, ash pans, and pedestal caps. The suggestions the request was repeated for the 1893 Columbian Exposition display engine completed two months later (Locobase 11180).
Principal Dimensions by Steve Llanso of Middle Run Media | ||||
---|---|---|---|---|
Class | 20 | 46 | Cyriaco do Amaral | Eleuzina Barbosa |
Locobase ID | 12027 | 13248 | 12198 | 20704 |
Railroad | Oeste de Minas | Oeste de Minas | Oeste de Minas | Oeste de Minas |
Country | Brazil | Brazil | Brazil | Brazil |
Whyte | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 |
Number in Class | 3 | 5 | 2 | 2 |
Road Numbers | 20-22 | 46-48 / 20-22 | 7-8 / | 1-2 |
Gauge | 2'6" | Metre | Metre | Metre |
Number Built | 3 | 5 | 2 | 2 |
Builder | Burnham, Williams & Co | Burnham, Williams & Co | Burnham, Williams & Co | Burnham, Williams & Co |
Year | 1892 | 1908 | 1896 | 1893 |
Valve Gear | Stephenson | Walschaert | Stephenson | Stephenson |
Locomotive Length and Weight | ||||
Driver Wheelbase (ft / m) | 7.33 / 2.23 | 5.50 / 1.68 | 7.17 / 2.19 | 8.17 / 2.49 |
Engine Wheelbase (ft / m) | 18.67 / 5.69 | 16 / 4.88 | 18.25 / 5.56 | 21.25 / 6.48 |
Ratio of driving wheelbase to overall engine wheelbase | 0.39 | 0.34 | 0.39 | 0.38 |
Overall Wheelbase (engine & tender) (ft / m) | 38.54 / 11.75 | |||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||||
Weight on Drivers (lbs / kg) | 34,000 / 15,422 | 39,000 / 17,690 | 26,000 / 11,793 | 37,020 / 16,792 |
Engine Weight (lbs / kg) | 52,000 / 23,587 | 57,000 / 25,855 | 39,000 / 17,690 | 58,320 / 26,454 |
Tender Loaded Weight (lbs / kg) | 37,000 / 16,783 | 51,433 / 23,330 | ||
Total Engine and Tender Weight (lbs / kg) | 94,000 / 42,638 | 109,753 / 49,784 | ||
Tender Water Capacity (gals / ML) | 1200 / 4.55 | 1800 / 6.82 | 1800 / 6.82 | 2000 / 7.58 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5 / 5 | |||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 28 / 14 | 33 / 16.50 | 22 / 11 | 31 / 15.50 |
Geometry Relating to Tractive Effort | ||||
Driver Diameter (in / mm) | 33 / 838 | 38 / 965 | 43 / 1092 | 49.25 / 1251 |
Boiler Pressure (psi / kPa) | 180 / 1240 | 160 / 1100 | 135 / 930 | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 7.5" x 16" / 191x406 | 12" x 18" / 305x457 | 12" x 16" / 305x406 | 9" x 20" / 229x508 |
Low Pressure Cylinders (dia x stroke) (in / mm) | 13" x 16" / 330x406 | 15" x 20" / 381x508 | ||
Tractive Effort (lbs / kg) | 6261 / 2839.95 | 9277 / 4207.98 | 6148 / 2788.69 | 7401 / 3357.04 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.43 | 4.20 | 4.23 | 5.00 |
Heating Ability | ||||
Tubes (number - dia) (in / mm) | 182 - 1.75" / 44 | 88 - 2" / 51 | 112 - 1.5" / 38 | 140 - 2" / 51 |
Flues (number - dia) (in / mm) | ||||
Flue/Tube length (ft / m) | 9.58 / 2.92 | 14 / 4.27 | 8.81 / 2.69 | 10.83 / 3.30 |
Firebox Area (sq ft / m2) | 66 / 6.13 | 39 / 3.62 | 53 / 4.93 | 73 / 6.78 |
Grate Area (sq ft / m2) | 9.50 / 0.88 | 13.70 / 1.27 | 9.10 / 0.85 | 10 / 0.93 |
Evaporative Heating Surface (sq ft / m2) | 865 / 80.39 | 680 / 63.17 | 440 / 40.89 | 862 / 79.99 |
Superheating Surface (sq ft / m2) | ||||
Combined Heating Surface (sq ft / m2) | 865 / 80.39 | 680 / 63.17 | 440 / 40.89 | 862 / 79.99 |
Evaporative Heating Surface/Cylinder Volume | 1057.30 | 288.60 | 210.08 | 585.35 |
Computations Relating to Power Output (More Information) | ||||
Robert LeMassena's Power Computation | 1710 | 2192 | 1229 | 1800 |
Same as above plus superheater percentage | 1710 | 2192 | 1229 | 1800 |
Same as above but substitute firebox area for grate area | 11,880 | 6240 | 7155 | 13,140 |
Power L1 | 4813 | 3763 | 3257 | 4432 |
Power MT | 624.17 | 425.44 | 552.34 | 527.87 |