NSWGR steam locomotive classification

In the first 36 years of its existence, the NSW Railways introduced 42 separate classes of locomotives. The appointment by the Premier of New South Wales, Henry Parkes of Mr E.M.G Eddy as Chief Commissioner in 1888 created an independent railway department and saw the following 36 years with only sixteen new classes produced.[1]

Locomotive No. 1
Drawing General Arrangement

ClassificationEdit

Steam Locomotive classification on the New South Wales Government Railways had three distinct classification systems.

From 1855 to 1890 (numerical)Edit

The classification was taken from the road number given to the first engine in each class.

The engines attached to the then isolated Northern section had the terminal letter "N" added to the road number.

From October 1890 to August 1924 (letter and number)Edit

A letter was selected arbitrarily and placed before the first number allotted to each class. e.g. the 93-class became the A.93-class. Letters were initially allocated, in alphabetic order, by class size. The 93 Class had the most locomotives in traffic (77) so they were given the letter 'A', the 205 Class were the next most numerous (70 in traffic), so were classified 'B', the 79 Class the third most numerous (68 in service) so were granted the letter 'C' and so on. With the opening of the Hawkesbury Bridge in May 1889, the Northern section engines were renumbered and grouped with the others of the Sydney system, using the numbers 388-435. the final "N" being dropped .

In general practice, the class letter only was quoted, without the number, except when there were one or two variants using a common class-letter.

From August 1924 (letter and number)Edit

All engines were given new four-figure numbers, the first two digits indicating the class and the second two, the engine number, arranged in chronological order of commencement of service. When the number of engines in a class exceeded 99, 100 was added to the number, e.g., the 137th engine of the 32-class was 3337. Engines numbered from 1000 up were the first to be renumbered using the new system to prevent two locomotives sharing the same number being in service at the same time.

The initial letters indicate :

  • "C"-three driving axles;
  • "D"-four driving axles;
  • "AD"-two articulated sets of four driving axles (Only for the AD60s);
  • "Z"-old classes which would never be repeated, and
  • "X" -associated with the 10-class, which included all types of duplicates; yard and depot locomotives, crane locomotives, locomotive and accident cranes and special equipment.

Initial letters are dropped in general usage with a "C.36-class" engine universally known as a "36-class".

ClassesEdit

Classification
Image Whyte notation First pre 1924 post 1924 Type Year
  2-2-2 6 Passenger 1856
  2-2-2 8N Passenger 1864
  2-2-2 9 Passenger, Coal 1858
  2-2-2 14 Express Passenger 1865
  2-2-2T 8 Passenger Tank 1859
  0-4-2 1 Mixed Traffic 1855
  0-4-2 5 Mixed Traffic 1856
  0-4-2 1N Mixed Traffic 1857
  0-4-2 36 M.36 X.10 Mixed Traffic 1870
  2-4-0 10[2] Passenger 1870
  2-4-0 13 Mixed Traffic 1863
  2-4-0 23 G.23 Passenger 1863
  2-4-0T 6N Mineral Tank Type 1863
  2-4-0T 351 F.351 X.10 Suburban Passenger Tank 1885
  4-4-0 79 C.79 Z.12 Passenger 1877
  4-4-0 105 U.105
(later S.105)
Passenger 1877
  4-4-0 255 D.255 Z.15 Express Passenger 1882
  4-4-0 261 D.261 Z.16 Express Passenger 1883
  4-4-0 334 D.334 Z.16 Express Passenger 1885
  4-4-0 373 H.373 Z.17 Passenger 1887
  4-4-0 CG Z.14 (C)onverted (G)-Class 1903
  4-4-0 158 Q.158 Light Mixed Traffic 1880
  4-4-0T 158 Q.158 Suburban Passenger Tank 1910
  4-4-0T 6N 6N Mineral Tank 1863
  4-4-2T M.40 Z.11 Suburban Passenger Tank 1891
  4-4-2T 79 CC.79 Z.13 Suburban Passenger Tank 1877
  0-6-0 17 E.17 Goods 1863
  0-6-0 23N Goods 1874
  0-6-0 (2nd)48 I.48 Goods 1874
  0-6-0 60 O.60 Passenger 1874
  0-6-0 93 A.93 Z.19 Goods 1877
  0-6-0T 29-31,9N S.29 Box Saddle Tank 1864
  0-6-0T 20N Goods Saddle Tank 1872
  0-6-0T (1st) 48 Goods Tank 1872
  0-6-0T 66 P.127 Small Saddle Tank 1874
  0-6-0T 67 N.67 Suburban Passenger Tank 1875
  0-6-0T 285 R.285 Z.18 Suburban Passenger Tank 1884
  2-6-0 B.55 Z.24 Goods 1891
  2-6-0 205 B.205 Z.25 Goods 1882
  2-6-0 294 K.294 Goods 1885
  2-6-0 304 L.304 Z.21 Passenger 1885
  2-6-0 L.436 Z.22 Passenger 1890
  2-6-0 G.1204 Z.27 Goods 1917
  2-6-2T I.17 Z.26 Mineral Tank 1891
  2-6-4T E.10 Z.20 Mineral Tank 1891
  2-6-4T A/E Z.20 Mineral Tank E.10 rebuild 1902
  4-6-0 O.446 Z.23 Passenger 1891
  4-6-0 P.6 C.32 Passenger 1892
  4-6-0 N.928 C.34 Express Passenger 1909
  4-6-0 NN.1027 C.35 Express Passenger 1914
  4-6-0 C.36 Express Passenger 1925
  4-6-0 C.30T Brunch line work (converted tank engines) 1928
  4-6-2 C.38 Express Passenger 1943
  4-6-4T S.636 C.30 Suburban Passenger Tank 1903
  2-8-0 131 J.131 Z.28 Goods 1879
  2-8-0 J.522 Z.28 Goods 1893
  2-8-0 J.483 Z.29 Goods 1891
  2-8-0 T.524 D.50 Goods 1896
  2-8-0 TF.939 D.53 Goods 1912
  2-8-0 K.1353 D.55 Goods 1918
  2-8-2 D.59 Goods 1952
  4-8-2 D.57 Heavy Goods 1929
  4-8-2 D.58 Heavy Goods 1950
  4-8-4+4-8-4 AD.60 Heavy Goods 1952

See alsoEdit

ReferencesEdit

  1. ^ New South Wales Department of Railways Archives[full citation needed]
  2. ^ "COLONIAL MANUFACTURED LOCOMOTIVE". Illustrated Sydney News (NSW : 1853 - 1872). NSW: National Library of Australia. 29 September 1870. p. 12. Retrieved 26 August 2013.