WAGR D class

The WAGR D class was a class of 4-6-4T tank locomotive operated by the Western Australian Government Railways (WAGR) between 1912 and 1964.

Not to be confused with WAGR D class (1884) or WAGR D class (diesel).

WAGR D class
Builder's photograph of a D class
Type and origin
Power typeSteam
BuilderNorth British Locomotive Company
Serial number19709-19728
Build date1912
Total produced20
Specifications
Configuration:
​
 • Whyte4-6-4T
Gauge3 ft 6 in (1,067 mm)
Driver dia.4 ft 6 in (1,372 mm)
Length42 ft 6 in (12.95 m)
Loco weightAs built: 68 long tons 5 cwt (152,900 lb or 69.3 t)
Superheated: 70 long tons 0 cwt (156,800 lb or 71.1 t)
Fuel typeCoal
Fuel capacity4 long tons 0 cwt (9,000 lb or 4.1 t)
Water cap.1,600 imp gal (7,300 L; 1,900 US gal)
Firebox:
 • Firegrate area		18.63 sq ft (1.731 m2)
Boiler pressureAs built: 175 lbf/in2 (1.21 MPa)
Superheated: 160 lbf/in2 (1.10 MPa)
Cylinder sizeAs built: 17 in × 23 in (432 mm × 584 mm)
Superheated: 18 in × 23 in (457 mm × 584 mm)
Performance figures
Tractive effortAs built: 17,233 lbf (76.66 kN)
Superheated: 18,768 lbf (83.48 kN)
Factor of adh.As built: 4.7
Superheated: 4.6
Career
OperatorsWestern Australian Government Railways
NumbersD368-D387
Dispositionall scrapped

History

In 1911 the WAGR placed an order with the North British Locomotive Company for twenty 4-6-4T locomotives to haul suburban passenger services in Perth. All entered service between June and September 1912. Commencing in 1932, all bar D386 were rebuilt as the Ds class with superheated boilers. In 1935, D377 was fitted with larger side tanks increasing its water capacity by 210 gallons, these were removed in May 1959. With the arrival of the ADH class diesel multiple units in 1953, withdrawals commenced with the last withdrawn in November 1965.[1][2][3]

The D class was also the basis for the later Dm and Dd classes of tank engine, which continued this role until the end of steam.[1]

Class list

The numbers and periods in service of each member of the D class were as follows:[4]

Builder's
number		 Road
number		 In service Superheated Withdrawn Notes
19709 368 6 July 1912 1 April 1933 5 March 1964
19710 369 13 July 1912 3 July 1935 7 October 1963
19711 370 6 July 1912 21 December 1933 14 February 1952
19712 371 6 July 1912 15 May 1933 18 November 1965 Stowed 31 July 1964
19713 372 6 July 1912 23 September 1947 22 July 1963
19714 373 29 June 1912 15 November 1939 5 March 1964
19715 374 29 June 1912 30 May 1934 23 April 1963
19716 375 13 July 1912 9 April 1932 19 October 1964 Stowed 1 April 1964
19717 376 29 June 1912 27 April 1934 12 November 1963 Stowed 2 September 1963
19718 377 20 July 1912 5 September 1935 15 May 1962 Tanks extended 5 September 1935 to May 1959
19719 378 13 July 1912 21 April 1944 12 December 1963
19720 379 21 September 1912 6 November 1933 31 October 1961
19721 380 14 September 1912 25 July 1947 17 March 1954
19722 381 28 September 1912 19 March 1932 16 March 1964
19723 382 21 September 1912 27 September 1935 1 March 1962
19724 383 21 September 1912 18 April 1931 16 September 1953
19725 384 28 September 1912 29 March 1934 16 August 1962
19726 385 28 September 1912 16 May 1932 16 August 1954
19727 386 21 September 1912 15 May 1950 Not superheated
19728 387 14 September 1912 14 December 1946 19 June 1953

Namesakes

The D class designation was previously used for the D class locomotive that was withdrawn in 1903. It was reused in the 1970s when the D class diesel locomotives entered service.

See also

References

Notes
  1. Gunzburg 1984, pp. 93–94.
  2. Turner, Jim (1997). Australian Steam Locomotives 1896-1958. Kenthurst: Kangaroo Press. p. 58. ISBN 086417778X.
  3. Oberg, Leon (2010). Locomotives of Australia 1850s-2010. Dural: Rosenberg Publishing. pp. 153–154. ISBN 9781921719011.
  4. Gunzburg 1984, p. 94.

Cited works
  • Gunzburg, Adrian (1984). A History of WAGR Steam Locomotives. Perth: Australian Railway Historical Society (Western Australian Division). ISBN 0959969039.

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