The South Australian Railways I Class locomotive entered service on the South Australian Railways as No. 161 on 9 December 1910.^[1]

This article relies largely or entirely on a single source. (January 2022)

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South Australian Railways I Class (2nd)
South Australian Railways I Class (2nd) No. 161
Type and origin Power type Steam Builder Beyer, Peacock and Company Serial number 2980 Build date 1888 Total produced 1
Specifications Configuration: ​  • Whyte 0-4-0ST  • UIC B T Gauge 5 ft 3 in (1,600 mm) Driver dia. 3 ft 0 in (910 mm) Length 21 ft 5+1⁄2 in (6.54 m) Axle load 11 long tons 6 cwt (25,300 lb or 11.5 t) Tender weight 22 long tons 7 cwt (50,100 lb or 22.7 t) Fuel type Coal Fuel capacity 0 long tons 10 cwt (1,100 lb or 0.5 t) Water cap. 500 imp gal (600 US gal; 2,300 L) Firebox: ​  • Grate area 7.5 sq ft (0.70 m2) Boiler pressure 145 psi (1,000 kPa) Heating surface: ​  • Firebox 38 sq ft (3.5 m2)  • Tubes 550 sq ft (51 m2) Cylinders 2 Cylinder size 12 in × 18 in (305 mm × 457 mm)
Performance figures Tractive effort 8,874 lbf (39.47 kN)
Career Operators South Australian Railways Class I Numbers 161 Withdrawn 1929 Scrapped 1930

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The engine was built by Beyer, Peacock and Company in 1888 and imported to Victoria, Australia. It initially worked on a private railway in Victoria, and was then sent to contractors "Waring and Rawdon" in 1903 for construction work at Outer Harbor, South Australia. After its private work years it was sold to the South Australian Government by the Engineer-in-Chief's Department. It officially entered service on the South Australian Railways on 9 December 1910 as No. 161. Between 1918 and 1919 it was then classified "I" and worked until 8 April 1929, then finally scrapped on 10 May 1930.^[1]