Data from [] (July 2002); and "Leopoldina Railway-Design 1148", Beyer-Garrrat Patent Articulated Locomotives (Manchester, England: Beyer-Peacock & Company Limited, 1931), archived on flickr's Historical Railway Images at [], et seq, pp. 32-33. Works numbers were 6572-6573) in 1929. Later batches comprised 6845-6850 in 1937, and 7026-7033 in 1943.
Three batches of Double Pacific Garratts produced to increase train tractive effort by 80% when substituting one for the rigid-wheelbase Pacifics already in service.. These were assigned to the heavy night passenger train run of 323 miles (520 kph) between Campos and Victoria. The route had a ruling grade of 3% which the Garratt could take at 15 mph with 10 coaches.
A photo from [] (July 2002) shows the Belpaire firebox and the classic Garratt layout. A special bit of style are the white-rimmed tires.
Data from [] (July 2002); A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), pp 86; and Tufnell (1986). Works numbers were 6976-6979 in 1943.
A relatively rare four-coupled Garratt, this design served the Canatgallao branch of the Portello-Cordiero line. The large Belpaire firebox reflects the low quality of the fuel, which Tufnell (1986) wrote included coal with ash contents as high as 40% or wood. Handling such dodgy fuel required rocking grates and self-cleaning ashpans. The constant-lead radial valve gear actuated poppet valves.
Spreading its adhesive weight over four axles allowed useful work on an axle loading of 9 long tons, around very sharp curves, and up grades of up to 3%.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 380 | 400 |
Locobase ID | 587 | 586 |
Railroad | Leopoldina Railway | Leopoldina Railway |
Country | Brazil | Brazil |
Whyte | 4-6-2+2-6-4 | 2-4-2+2-4-2 |
Number in Class | 16 | 4 |
Road Numbers | 380-395 | 400-403 |
Gauge | Metre | Metre |
Number Built | 16 | 4 |
Builder | Beyer, Peacock | Beyer, Peacock |
Year | 1929 | 1943 |
Valve Gear | Walschaert | Walschaert |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 19 / 5.79 | 12.33 / 1.88 |
Engine Wheelbase (ft / m) | 46 / 14.02 | 16.92 / 5.16 |
Ratio of driving wheelbase to overall engine wheelbase | 0.41 | 0.73 |
Overall Wheelbase (engine & tender) (ft / m) | 67.08 / 20.45 | 62.01 / 18.90 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 23,369 / 10,600 | 19,709 / 8940 |
Weight on Drivers (lbs / kg) | 141,094 / 63,999 | 77,162 / 35,000 |
Engine Weight (lbs / kg) | 249,781 / 113,299 | 154,321 / 69,999 |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | 249,781 / 113,299 | 154,321 / 69,999 |
Tender Water Capacity (gals / ML) | 4200 / 15.91 | 2041 / 7.73 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5 / 4.50 | 2.80 / 3 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 39 / 19.50 | 32 / 16 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 50 / 1270 | 40 / 1016 |
Boiler Pressure (psi / kPa) | 188.50 / 1300 | 178.40 / 1230 |
High Pressure Cylinders (dia x stroke) (in / mm) | 15.5" x 22" / 394x559 (4) | 10.98" x 20" / 279x508 (4) |
Tractive Effort (lbs / kg) | 33,875 / 15365.46 | 18,282 / 8292.59 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.17 | 4.22 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | ||
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | ||
Firebox Area (sq ft / m2) | 151 / 14.03 | 127.98 / 11.89 |
Grate Area (sq ft / m2) | 34 / 3.16 | 30.25 / 2.81 |
Evaporative Heating Surface (sq ft / m2) | 1696 / 157.56 | 920 / 85.50 |
Superheating Surface (sq ft / m2) | 335 / 31.12 | 182 / 16.91 |
Combined Heating Surface (sq ft / m2) | 2031 / 188.68 | 1102 / 102.41 |
Evaporative Heating Surface/Cylinder Volume | 176.50 | 209.87 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 6409 | 5397 |
Same as above plus superheater percentage | 7434 | 6314 |
Same as above but substitute firebox area for grate area | 33,018 | 26,713 |
Power L1 | 8935 | 8676 |
Power MT | 837.67 | 991.54 |