VF do Rio Grande do Sul Beyer-Garratt Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 901 (Locobase 571)

Data from Gavin Hamilton's excellent compilation of Garratt data posted at [link]

(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 [link] (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
Class901
Locobase ID571
RailroadVF do Rio Grande do Sul
CountryBrazil
Whyte4-6-2+2-6-4
Number in Class10
Road Numbers901-910
GaugeMetre
Number Built10
BuilderHenschel & Sohn
Year1931
Valve GearWalschaert
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 Volume156.92
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation8774
Same as above plus superheater percentage11,055
Same as above but substitute firebox area for grate area41,841
Power L111,509
Power MT1196.54

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