South Australian Railways 700 class (steam)

The South Australian Railways 700 class was a class of 2-8-2 steam locomotives operated by the South Australian Railways.

South Australian Railways 700 Class
South Australian Railways 700 Class Locomotive No. 700, 1926
Type and origin
Power typeSteam
DesignerFred Shea
BuilderArmstrong Whitworth
Serial number643-652
Build date1925
Total produced10
Specifications
Configuration:
​
 • Whyte2-8-2 1′D1′ 2′2′
Gauge1,600 mm (5 ft 3 in)
Leading dia.2 ft 9 in (838 mm)
Driver dia.4 ft 9 in (1,448 mm)
Trailing dia.3 ft 6 in (1,067 mm)
Length73 ft 2 in (22.30 m)
Height13 ft 6 1⁄2 in (4,127.5 mm)
Axle load18 long tons 7 cwt
(20.6 short tons; 18.6 t)
Adhesive weight70.15 long tons
(78.57 short tons; 71.28 t)
Loco weight96.10 long tons
(107.63 short tons; 97.64 t)
Tender weight75.95 long tons
(85.06 short tons; 77.17 t)
Total weight171 long tons 15 cwt (384,700 lb or 174.5 t)
166 long tons 6 cwt 2 qr (372,570 lb or 168.99 t)
166 long tons 6 cwt 2 qtr
(186.28 short tons; 168.99 t) original
Fuel typeCoal
Oil
Fuel capacity17 long tons (19 short tons; 17 t)
14 1⁄2 long tons (16.2 short tons; 14.7 t) on 60 lb/yd (29.8 kg/m). rail
2,950 imp gal
(3,540 US gal; 13,400 L) oil
Water cap5,900 imp gal
(7,100 US gal; 27,000 L)
Firebox:
 • Firegrate area		47 sq ft (4.4 m2)
Boiler pressure200 psi (1,379 kPa)
Heating surface:
 • Tubes and flues		2,400 sq ft (220 m2)
 • Firebox195 sq ft (18.1 m2)
Superheater:
​
 • Heating area619 sq ft (57.5 m2)
Cylinders2
Cylinder size22 in × 28 in (559 mm × 711 mm)
Valve gearWalschaerts valve gear
Valve typePiston
Performance figures
Tractive effort40,418 lbf (179.79 kN)
Factor of adh.4.11
Career
OperatorsSouth Australian Railways
Class700
Number in class10
Numbers700-709
First run27/4/1926
Withdrawn1959-1967
Preserved702
Scrapped1962-1968
Disposition1 preserved, 9 scrapped

History

As part of William Webb's rehabilitation of the South Australian Railways, ten 2-8-2 steam locomotives were delivered by Armstrong Whitworth, Newcastle upon Tyne in March 1926. They were designed to operate across all broad gauge branch lines. In 1928, they were followed by ten nearly identical 710 class locomotives built at Islington Railway Workshops. Coal shortages after World War II saw a number converted to burn oil. All were later converted back to coal burners. The first two were withdrawn in June 1959 with the remainder replaced as 830 diesel locomotives entered service. The last was withdrawn in June 1968.[1][2]

The National Railway Museum, Port Adelaide has preserved 702.[3]

References
  1. Drymalik, Chris. "Broad Gauge 700 class 2-8-2 locomotives". Chris's Commonwealth Railways Page.
  2. Oberg, Leon (1984). Locomotives of Australia 1850s-1980s. Frenchs Forest: Reed Books. pp. 148–149. ISBN 0730100057.
  3. 702 National Railway Museum

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