South Australian Railways Beyer-Garratt Locomotives in Australia


Class Details by Steve Llanso of Sweat House Media

Class 400 (Locobase 541)

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

(6 September 2005). Later communication (22 June 2009) from Damien Garton pointed Locobase to the Zig Zag Railway's site [link], which confirmed that some of the original data was incorrect. Driver diameter was originally shown as 51", cylinder dimensions as 16" x 26", boiler pressure as 204.5 psi. See also the Australian National Rail Museum's exhibit description at [link] and Johnny's Railway history bits at [link]

Double Mountain Garratts supplied under subcontract from Beyer, Peacock. BP work numbers 7622-7631; Franco-Belge work numbers 2973-2982. The class was identical to the East African Railways 60th class shown in Locobase 692. According to the museum "These arrived in 1953, and by 1955 had taken over most of the working of the Broken Hill line. Identical in main specifications to the world-famous 60th class of the East African Railways, the 400's were oil-burners, but with provision for the installation of a mechanical stoker if converted to burn coal. They were also designed to be easily converted for service on either the broad or standard gauge if required. Unfortunately, these magnificent engines came too late, for less than ten years after they were fully in service the diesel appeared on the scene and in 1963 they were all placed in storage at Peterborough. Here they were to remain until 1969 when a few of them were returned to service while the diesels were being converted ready for service on the new standard gauge line.

Principal Dimensions by Steve Llanso of Middle Run Media
Class400
Locobase ID541
RailroadSouth Australian Railways
CountryAustralia
Whyte4-8-2+2-8-4
Number in Class10
Road Numbers400-409
Gauge3'6"
Number Built10
BuilderSA Franco-Belge, Raismes
Year1953
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)87.42 / 26.65
Axle Loading (Maximum Weight per Axle) (lbs / kg)23,912 / 10,846
Weight on Drivers (lbs / kg)190,176 / 86,262
Engine Weight (lbs / kg)333,760 / 151,391
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)4440 / 16.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)1680 / 6359
Minimum weight of rail (calculated) (lb/yd / kg/m)40 / 20
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)200 / 1380
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610 (4)
Tractive Effort (lbs / kg)43,520 / 19740.36
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.37
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)193 / 17.94
Grate Area (sq ft / m2)48.75 / 4.53
Evaporative Heating Surface (sq ft / m2)1972 / 183.27
Superheating Surface (sq ft / m2)370 / 34.39
Combined Heating Surface (sq ft / m2)2342 / 217.66
Evaporative Heating Surface/Cylinder Volume176.54
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation9750
Same as above plus superheater percentage11,310
Same as above but substitute firebox area for grate area44,776
Power L18977
Power MT832.53

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