WAGR D class

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

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.

WAGR D class
Builder's photograph of a D class
Type and origin Power type Steam Builder North British Locomotive Company Serial number 19709-19728 Build date 1912 Total produced 20
Specifications Configuration: ​  • Whyte 4-6-4T Gauge 3 ft 6 in (1,067 mm) Driver dia. 4 ft 6 in (1,372 mm) Length 42 ft 6 in (12.95 m) Loco weight As 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 type Coal Fuel capacity 4 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: ​  • Grate area 18.63 sq ft (1.731 m2) Boiler pressure As built: 175 lbf/in2 (1.21 MPa) Superheated: 160 lbf/in2 (1.10 MPa) Cylinder size As built: 17 in × 23 in (432 mm × 584 mm) Superheated: 18 in × 23 in (457 mm × 584 mm)
Performance figures Tractive effort As 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 Operators Western Australian Government Railways Numbers D368-D387 Disposition all 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 With the arrival of the ADH class diesel multiple units in 1953, withdrawals commenced with the last withdrawn in November 1965.^[1][2][3]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Builder's number Road number In service Superheated Withdrawn Notes 19709 368 6 July 1912 1 April 1933 5 March 1964 19710 369 13 July 1912 3 July 1935 7 October 1963 19711 370 6 July 1912 21 December 1933 14 February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

• Trains portal
• Western Australia portal

• Rail transport in Western Australia
• List of Western Australian locomotive classes