Great Western of Brazil Beyer-Garratt Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 238 (Locobase 565)

Data is from Wiener (1930) A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p.91.and from Gavin Hamilton's compilation of Garratt data posted at [] (6 September 2005). Works numbers were 1024-1025.

Some of the boiler tubes on these Prairie Garratts measured 1 3/8" in diameter. A table of Brazilian Garratts on the Brazilian website [], last accessed on 21 June 2011 shows cylinders with a 20" (508-mm) stroke.


Class 610 (Locobase 572)

Data from [] (July 2002); and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p. 91. Works numbers were 25257-25262 in 1952. (BP 6966-6969 & 7136-7137)

Big metre-gauge Double Mountain Garratts ordered in two batches by the Great Western Railway of Brazil from Beyer Peacock during World War II (1940 and 1944, respectively). The onset of World War II prevented their deliver. Meanwhile, according to Durrant, the design was "exactly the sort of thing that the WD [War Department] were looking for." Dusting off the plans for the suspended GWBs, the WD supplied the design (Locobase 572) to several railways.

Well after the end of the war, BP subcontracted with Henschel to produce the engines. The latter turned them out as a single batch in 1952. Durrant noted that the East African Railways Class 60s (Locobase 692) and South Australian Class 400s (Locobase 541) were essentially identical.

Like many Garratts, these had Belpaire fireboxes.

GWB later renamed Rede Ferrovaria do Noroeste.

Principal Dimensions by Steve Llanso of Sweat House Media

Class238610
Locobase ID565 572
RailroadGreat Western of BrazilGreat Western of Brazil
CountryBrazilBrazil
Whyte2-6-2+2-6-24-8-2+2-8-4
Number in Class26
Road Numbers238-239/601-602610-615
GaugeMetreMetre
Number Built26
BuilderArmstrong WhitworthHenschel & Sohn
Year19291952
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)17.50 / 5.3335.67 / 2.72
Engine Wheelbase (ft / m)53 / 16.15
Ratio of driving wheelbase to overall engine wheelbase 0.33
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)22,848 / 10,36424,191 / 10,973
Weight on Drivers (lbs / kg)136,192 / 61,776189,505 / 85,958
Engine Weight (lbs / kg)199,360 / 90,428330,175 / 149,765
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)199,360 / 90,428330,175 / 149,765
Tender Water Capacity (gals / ML)4272 / 16.185040 / 19.09
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.40 / 4 7.50 / 7
Minimum weight of rail (calculated) (lb/yd / kg/m)38 / 1939 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 106748 / 1219
Boiler Pressure (psi / kPa)204.50 / 14.10204.50 / 14.10
High Pressure Cylinders (dia x stroke) (in / mm)14.5" x 22" / 368x560 (4)15.98" x 24.02" / 406x610 (4)
Tractive Effort (lbs / kg)38,287 / 17366.7144,425 / 20150.87
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.56 4.27
Heating Ability
Tubes (number - dia) (in / mm)168 - 1.875" / 48
Flues (number - dia) (in / mm)32 - 5.25" / 133
Flue/Tube length (ft / m)9 / 2.74
Firebox Area (sq ft / m2)121 / 11.25166.89 / 15.51
Grate Area (sq ft / m2)28.10 / 2.6148.74 / 4.53
Evaporative Heating Surface (sq ft / m2)1317 / 122.401944 / 180.67
Superheating Surface (sq ft / m2)285 / 26.49369 / 34.29
Combined Heating Surface (sq ft / m2)1602 / 148.892313 / 214.96
Evaporative Heating Surface/Cylinder Volume156.61174.33
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation57469967
Same as above plus superheater percentage678111,562
Same as above but substitute firebox area for grate area29,19939,590
Power L176388948
Power MT741.84832.78

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