Queensland Railways steam locomotive classification

Between 1864 and 1958, Queensland Railways ordered 47 types of locomotives for purposes such as freight, passenger and mail train use.

Classification

Until 1889, each of the isolated sections of the Queensland Railways adopted its own locomotive numbering system. With the impending joining of most of the sections, in 1890 a new centralised classification system was adopted to eliminate duplications. Locomotives on the Southern & Western Railway retained their existing numbers, with locomotives on other networks renumbered where there was a duplication.[1][2]

The classification system consisted of a letter, indicating the number of driving axles, followed by a number, indicating the cylinder diameter in inches and factions of inches. This was confusing for two reasons:

  • it differed from the international system
  • it could lead to several classes having the same classification number

Where classification numbers were duplicated, the classes were usually distinguished by the name of the builder, e.g. A10 Baldwin, A10 Fairlie, A10 Neilson.[1][2]

In the case of tank locomotives, the number of wheels was added as prefix, e.g. the 6D16 class had six wheels. When all four wheel tank locomotives, the prefix was dropped, thus the 6D16 class became the D17 class.[1][2]

Number of driving axles International classification QR classification
1 A -
2 B A
3 C B
4 D C
3 (Tank locomotive) D

Improved versions of a similar class were given a second identical letter. For example, the improved version of the D17 was the DD17.

Classes
Classification
ImageWhyte notationDesignationCylinder diameter (inches)Driving axlesTypeYears built
2-4-2T4D9 class94Tank (Mixed use)1881
2-4-2T4D10 class104Tank (Passenger)[3]1884-1885
0-4-2T4D11½ Abt class112Tank (Rack Freight)[4]1898
0-6-0T6D8½ class8 1/23Tank (Passenger)1900-1923
0-6-0ST6D11½ Crane class11 1/23Saddle Tank (Inspection)[5]1902
0-6-0T6D11½ Motor class11 1/23Tank (Freight)[6]1882
0-6-2T6D13 - formerly F-class133Tank (Freight)[7]1882
0-6-0T6D13½ Abt class13 1/23Tank (Rack Freight)[8]1900-1915
0-6-0T6D13½ later B13½ class13 1/23Tank (Shunter)[9]1904-1905
0-4-4-08D11 class114Tank1874
0-4-4-08D15 class154Tank (Heavy Freight) [10]1884
4-6-0PB15 class153Passenger, Shunter [11]1899-1926
4-6-2T (originally), 4-6-4T (after rebuild)6D16 class163Tank (suburban passenger)[12]1901-1902
4-6-4T6D17 later D17 class173Tank (suburban passenger)[12]1924-1942
2-4-0A10 Avonside102Freight1864
4-4-0A10 Baldwin – Originally American Passenger class102Passenger[13]1879
2-4-0A10 Fairlie – Originally A class102Freight[14]1877
2-4-0A10 Ipswich102Freight1877
0-4-2A10 Neilson class – Originally B class102Mixed[15]1865-1866
2-4-0A11 class – Originally Large A class112Mixed[16]1878
4-4-0A12 class – Originally American Passenger class122Passenger[17]1882-1891
4-4-0A12 (small) class – American Passenger class122Passenger[18]1878
4-4-0A14 class142Passenger[19]1894-1895
2-8-2AC16 class162Mixed use[20]1943
4-8-2+2-8-4 2′D1′+1′D2′Australian Standard Garratt14.54Heavy freight[21]1943-1945
0-6-2B9½ class93Freight1924-1927
2-6-0B11 class – Originally C class113Freight[22]1867
2-6-0B11 Baldwin class113Freight, then shunting [23]1880
2-6-0B12 class – Originally E class123Mixed use[24]1874-1882
4-6-0B13 class133Mixed use[25]1883-1895
4-6-0B13 Baldwin class133Freight1908
4-6-0B15 class153Freight[26]1889-1899
2-6-2B16½ class16 1/23Passenger[26]1918
4-6-0B17 class173Express Passenger[27]1911
4-6-2B18¼ class18 1/43Express passenger, suburban passenger, mail trains and heavy freight[27]1926-1947
4-6-2BB18¼ class18 1/43Express passenger, mail trains, suburban passenger and heavy freight trains [28]1950-1958
4-8-2+2-8-4Beyer-Garratt class13 3/44Freight[29]1950-1951
2-8-0C13 Baldwin class134Freight[30]1879
2-8-0C13 Dubs class134Freight[31]1883
2-8-0C15 class – Originally Small Consolation class154Mixed[32]1879
2-8-0C16 Baldwin class – Large Consolidation class154Freight[33]1882
4-8-0C16 class164Poison trains, mail trains, goods trains[34]1903-1918
4-8-0C17 class174Mail trains, suburban passenger, freight trains and passenger[35]1920-1953
4-8-0C18 later CC19 class18 (then 19)4Express passenger[36]1914
4-8-0C19 class194Express passenger[37]1922-1935
4-6-4TDD17 class173Suburban passenger[37]1948-1952
0-6-6-0Double boilered Cross class176Freight1867

References
  1. Armstrong, John (1985). Locomotives in the Tropics Volume 1. Brisbane: Australian Railway Historical Society. p. 8. ISBN 0 909937 13 3.
  2. Clark, Peter (2012). An Australian Locomotive Guide. Rosenberg Publishing. p. 16. ISBN 9781921719554.
  3. "4D10 – Ipswich Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  4. "4D11½ Abt Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  5. "6D11½ Crane Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  6. "6D11½ Motor Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  7. "6D13 – Originally F – Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  8. "6D13½ Abt Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  9. "6D13½ later B13½ Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  10. "8D15 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  11. "PB15 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  12. "6D16 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  13. "A10 Baldwin – Originally American Passenger Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  14. "A10 Fairlie – Originally A Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  15. "Queensland A10 Neilson class locomotive", Wikipedia, 10 August 2019, retrieved 24 November 2019
  16. "A11 – Originally Large A Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  17. "A12 – Originally American Passenger Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  18. "Queensland A12 small class locomotive", Wikipedia, 10 August 2019, retrieved 24 November 2019
  19. "A14 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  20. "AC16 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  21. "Australian Standard Garratt « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  22. "B11 – Originally C Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  23. "B11 Baldwin Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  24. "B12 – Originally E Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  25. "B13 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  26. "B15 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  27. "B17 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  28. "BB18¼ Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  29. "Beyer-Garratt Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  30. "C13 Baldwin Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  31. "C13 Dubs – Originally Small Consolation Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  32. "C15 – Originally Large Consolation Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  33. "C16 Baldwin – Large Consolidation Classba « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  34. "C16 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  35. "C17 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  36. "C18 later CC19 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
  37. "C19 Class « qrig.org – queensland railway's interest group". Retrieved 24 November 2019.
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