Data from Gavin Hamilton's excellent compilation of Garratt data posted at []
(6 September 2005); and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p. 90, 97.. See also data from [] (accessed July 2002)\ Works numbers 20356-20365 in 1924.
1
First batch of Pacific Garratts was ordered directly from Henschel to serve the Porto Alegre to Santa Maria. Durrant commented on the relatively tall drivers and light axle loading as "making them suitable for branch line mixed traffic." He also noted significant differences from the Beyer, Peacock model in its round-topped boiler, two domes (the front one housing the water top-feed), and both tanks' unusual shapes. Durrant described the front tank as "boat-shaped"in cross section--Locobase supposes the internal tank sloping up to the sides-- and the rear one as "pagoda shaped"..
The RGS later sent these to the EF Dona Tereza Cristina. Crews on the EFDTC found their "memories of the Garratts were unhappy." Both railways preferred large rigid-wheelbase or Mallet locomotives instead, he added.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 901 |
Locobase ID | 571 |
Railroad | VF do Rio Grande do Sul |
Country | Brazil |
Whyte | 4-6-2+2-6-4 |
Number in Class | 10 |
Road Numbers | 901-910 |
Gauge | Metre |
Number Built | 10 |
Builder | Henschel & Sohn |
Year | 1931 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | |
Engine Wheelbase (ft / m) | |
Ratio of driving wheelbase to overall engine wheelbase | |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 127,232 / 57,712 |
Engine Weight (lbs / kg) | 251,104 / 113,899 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 4165 / 15.78 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 12.30 / 11 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 35 / 17.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 45 / 1143 |
Boiler Pressure (psi / kPa) | 203.10 / 1400 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 24" / 356x610 (4) |
Tractive Effort (lbs / kg) | 36,092 / 16371.08 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.53 |
Heating Ability | |
Tubes (number - dia) (in / mm) | |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | |
Firebox Area (sq ft / m2) | 163.50 / 15.20 |
Grate Area (sq ft / m2) | 43.20 / 4.01 |
Evaporative Heating Surface (sq ft / m2) | 1342 / 124.72 |
Superheating Surface (sq ft / m2) | 478 / 44.42 |
Combined Heating Surface (sq ft / m2) | 1820 / 169.14 |
Evaporative Heating Surface/Cylinder Volume | 156.92 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 8774 |
Same as above plus superheater percentage | 11,055 |
Same as above but substitute firebox area for grate area | 41,841 |
Power L1 | 11,509 |
Power MT | 1196.54 |