South Australian Railways 700 class (steam)

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South Australian Railways 700 Class
South Australian Railways 700 Class Locomotive No. 700. 1926. State Library of South Australia B 3993.png
South Australian Railways 700 Class Locomotive No. 700, 1926
Type and origin
Power typeSteam
DesignerFred Shea
Builder Armstrong Whitworth
Serial number643-652
Build date1925
Total produced10
Specifications
Configuration:
​
 •  Whyte 2-8-2 1′D1′ 2′2′
Gauge 1,600 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 load 18 long tons 7 cwt
(20.6 short tons; 18.6 t)
Adhesive weight 70.15 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 type Coal
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 cap.5,900 imp gal
(7,100 US gal; 27,000 L)
Firebox:​
 • Grate area47 sq ft (4.4 m2)
Boiler pressure200 psi (1,379 kPa)
Heating surface:​
 • Firebox195 sq ft (18.1 m2)
 • Tubes and flues2,400 sq ft (220 m2)
Superheater:
​
 • Heating area619 sq ft (57.5 m2)
Cylinders 2
Cylinder size 22 in × 28 in (559 mm × 711 mm)
Valve gear Walschaerts valve gear
Valve type Piston
Performance figures
Tractive effort 40,418 lbf (179.79 kN)
Factor of adh. 4.11
Career
Operators South Australian Railways
Class 700
Number in class10
Numbers700-709
First run27/4/1926
Withdrawn1959-1967
Preserved702
Scrapped1962-1968
Disposition1 preserved, 9 scrapped

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

Contents

History

Delivery

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 1926. They were designed to be able to operate across broad gauge branch lines laid with 60lbs rail.

The first locomotive, 700 arrived at Port Adelaide via ship in March 1926. [1] 700 operated for the first time in April 1926 on a trial run north of Adelaide. [2] It was involved in a minor collision when it rear-ended a freight train in May 1926 between Upper Sturt and Mount Lofty. [3] In June 1926, it entered regular service between Adelaide and Murray Bridge, and the 9 remaining 700s were delivered that same month. [4]

The 700s were more common on freight trains but they also hauled passenger trains.

In 1927, 706 had its original trailing bogie replaced with a cast 'Delta' bogie, and it incorporated a booster. [5]

In 1928, the 700s were followed by ten nearly identical 710 class locomotives built at Islington Railway Workshops, which were built with boosters as previously installed on 706. [6]

Track Restrictions

In 1931, 700 and 710 class locomotives with boosters, including 706 were banned from 60lb laid lines because of the weight of the boosters. 706 and a few 710s had their boosters removed so they could operate on 60lb lines, as the 720 class locomotives were banned from operating on 60lb lines and so there were not enough larger locomotives to operate on them. The 700s and 710s faced increasing restrictions on speed, coal and water on 60lb lines during the 1930s. They were eventually barred from operating on the Pinnaroo and Barmera lines, but were allowed again in later years. They were also allowed to operate on the Port Dock, Semaphore, Outer Harbor lines following platform widening to provide sufficient space for Redhen railcars. However, the gap was not sufficient to allow the 700s to run at track speed past the platforms and so they were subject to severe speed restrictions. [4]

Modifications

The 700s had minor modifications made early in their operational life to address excessive axle loads and hot bearings. Some other modifications made across the whole class include the replacement of the sand domes with larger ones, the addition of blowdown mufflers in the 1930s, the replacement of the flanged smokestacks with tapered smokestacks, and the relocation of the turbo generators. Some 700s had their single-stage air compressors replaced with single cross-compound pumps. [4]

The locomotives were delivered in an all-black livery, but were outshopped with red buffer beams and red lining after the retirement of William Webb. The red lining was quickly covered by the weathering that the locomotives accumulated in service.

706 was damaged in a head-on collision with another train at Snowtown in 1945. [7] It returned to service with a significantly altered front appearance. The changes included a centre-mounted headlight, a numberplate below the headlight and a replacement pressed-steel pilot instead of the original lattice pilot delivered with Webb locomotives. For a short period of time it had a fabricated smokestack similar to the style seen on the 740 class locomotives but later received the standard tapered smokestack.

Coal shortages after World War II saw a number converted to burn oil, and some were converted to burn a mixture of coal and oil. Most were later converted back to coal burners, with the exception of 708. Coal pushers were also installed on some locomotives. All had their buffers removed in the 1940s following the changeover to automatic couplers in South Australia. [4]

Withdrawal and Preservation

The first two were withdrawn in June 1959 with the remainder replaced as 830 diesel locomotives entered service. Class leader 700 was the last in service, being withdrawn after a series of farewell tours named 'Sayonara Mikado', which occurred across the weekend of 1-2 June, 1968. 700 hauled the first 'Sayonara Mikado' trip which went to Angaston, and ended up joining the second trip with 718 to Victor Harbor to cover for a failed Rx224. [8] The 2 locomotives double-headed back to Adelaide, hours behind schedule due to 718 derailing on the Victor Harbor turntable, and were withdrawn from service after arriving in the early hours of 3 June. [9] [10] [11]

The National Railway Museum, Port Adelaide has preserved 702. It was originally moved to the Mile End Railway Museum in June 1965, before moving to the current museum site at Port Adelaide in 1988. [12] [13]

Class list

NumberDate in ServiceDate Withdrawn/CondemnedMileage
70027 April 19263 June 1968781,660 mi (1,257,960 km)
70128 August 192628 October 1966864,438 mi (1,391,178 km)
70220 September 19269 July 1964775,526 mi (1,248,088 km)
70310 September 19269 June 19591,068,326 mi (1,719,304 km)
70413 September 192614 April 1960797,179 mi (1,282,935 km)
7054 October 19266 July 1961738,250 mi (1,188,098 km)
70628 September 19267 September 1967691,951 mi (1,113,587 km)
70716 September 19269 June 1959958,431 mi (1,542,445 km)
70829 September 192628 October 1966782,696 mi (1,259,627 km)
7097 October 192628 October 1966694,798 mi (1,118,168 km)

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References


  1. ↑ "NEW LOCOMOTIVES". News . No. 837. 19 March 1926. p. 1 (HOME EDITION). Retrieved 28 December 2023– via National Library of Australia.
  2. ↑ "NEW LOCOMOTIVES". The Register (Adelaide) . No. 26, 226. 29 April 1926. p. 10. Retrieved 28 December 2023– via National Library of Australia.
  3. ↑ "TRAINS BUMP". The Advertiser . p. 13. Retrieved 28 December 2023– via National Library of Australia.
  4. 1 2 3 4 Colquhoun, Douglas; Stewien, Ronald; Thomas, Adrian (1968). 700: The 700 Series Locomotives of the South Australian Railways. Australian Railway Historical Society (S.A. Division) Inc.
  5. ↑ "FITTED WITH BOOSTER". The Register (Adelaide) . No. 26, 766. 31 May 1927. p. 3. Retrieved 28 December 2023– via National Library of Australia.
  6. ↑ "NEW LOCOMOTIVES". Chronicle . No. 3, 762. 27 October 1928. p. 59. Retrieved 28 December 2023– via National Library of Australia.
  7. ↑ Drymalik, Chris. "7.4.1945 Snowtown Yard locos SAR 706 + 734 in head-on smash (mb-b19-92)". Flickr. Retrieved 12 December 2023.
  8. ↑ "Train Derailed: Names Taken". Victor Harbour Times . No. 2, 417. 7 June 1968. p. 7. Retrieved 27 December 2023– via National Library of Australia.
  9. ↑ Drymalik, Chris. "Broad Gauge 700 class 2-8-2 locomotives". Chris's Commonwealth Railways Page.
  10. ↑ Oberg, Leon (1984). Locomotives of Australia 1850s-1980s. Frenchs Forest: Reed Books. pp. 148–149. ISBN   0730100057.
  11. ↑ Harvey, Dean. ""SAYONARA MIKADO" Adelaide to Victor Harbour Sunday, 2nd June, 1968" (PDF). SteamRanger Heritage Railway. Retrieved 12 December 2023.
  12. ↑ 702 National Railway Museum
  13. ↑ "702". Preserved Steam Locomotives Down Under. Retrieved 12 December 2023.


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