15 long tons 16 cwt or 35,400 lb or 17.7 short tons or 16.1 t
Adhesive weight
62 long tons 10 cwt or 140,000 lb or 70.0 short tons or 63.5 t
Loco weight
111 long tons 8 cwt or 249,500 lb or 124.8 short tons or 113.2 t
Total weight
200 long tons 13 cwt or 449,500 lb or 224.7 short tons or 203.9 t
Fuel type
Coal
Fuel capacity
9 long tons 15 cwt or 21,800 lb or 10.9 short tons or 9.9 t
Water cap.
9,100 imp gal (10,900 US gal; 41,000 L)
Firebox:
• Grate area
45 sq ft (4.2 m2)
Boiler pressure
215 psi (1,482 kPa)
Heating surface:
• Firebox
291 sq ft (27.0 m2)
• Tubes
2,163 sq ft (200.9 m2)
Superheater:
• Heating area
651 sq ft (60.5 m2)
Cylinders
2
Cylinder size
20.5 in × 28 in (521 mm × 711 mm)
Valve gear
Walschaerts
Valve type
Piston
Performance figures
Maximum speed
78 mph (126 km/h)
Power output
2,600 horsepower (1,940 kW) at 70 mph (113 km/h)
Tractive effort
as previously built 32,600 lbf (145 kN)
Factor of adh.
4.3
Career
Operators
South Australian Railways
Class
520
Number in class
12
Numbers
520-531
First run
10 November 1943
Withdrawn
1961-1971
Preserved
520 and 523
Scrapped
1961-1971
Disposition
2 preserved, 10 scrapped
The South Australian Railways 520 class, also known as "The Whispering Giants", is a class of streamliner 4-8-4 'Heavy Mountain' type steam locomotive operated by the former South Australian Railways. The 520 class is one of the fastest Australian-built steam locomotives, with engine 520 holding a verified speed record of over 78mph on the Port Pirie line on the 10th of November, 1943. [1]
^"S.A.R. 520 speed record 1943".
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