Queensland Railways DL class
|Queensland Railways DL class|
Robert Stephenson and Hawthorns
|Gauge||1,067 mm (3 ft 6 in)|
|Length||7.16 m (23 ft 6 in)|
|Locomotive weight||18 t (18 long tons; 20 short tons)|
|Prime mover||Gardner 6L3|
|Transmission||Wilson SCG R11A|
|Maximum speed||50 km/h (31 mph)|
|Power output||112 kW (150 hp)|
|Tractive effort||31 kN (7,000 lbf)|
|Number in class||4|
|First run||6 November 1939|
|Preserved||DL1, DL2, DL3|
|Current owner||Queensland Rail|
|Disposition||1 in service, 3 preserved|
The DL class provided the first diesel locomotive in service in Queensland, DL 1 being built to provide a light weight (maximum 6-long-ton / 6.1-tonne; 6.7-short-ton axle load) locomotive for the Mt Surprise - Forsayth section of the line from Mareeba, which since cyclonic rainfall in 1927 severely damaged the line, had only been able to support a rail motor hauling 1 or 2 goods wagons. DL1 was built by Queensland Railways in 1939, initially with C wheel arrangement but after rough riding during trials around Brisbane it was returned to the workshops and fitted with a pony wheel.
DL2 was built by Robert Stephenson and Hawthorns in 1954 and the final two were built by Walkers Limited in 1961. They were initially used exclusively west of Mt Surprise on the lightly trafficied line to Forsayth. When traffic on that line grew to the point where upgrading it to 10-long-ton / 10.2-tonne; 11.2-short-ton axle load was justified, the DL class was replaced by the 1720 class, and the 4 locos were then used as shunters at various locations.
|DL1||Etheridge||Queensland Railways||6 November 1939||13 February 1989||Preserved, Queensland Rail Heritage Division, on display at Workshops Rail Museum, North Ipswich|
|DL2||Forsayth||Robert Stephenson and Hawthorns||7747/2481||14 May 1954||15 May 1989||Static display at Forsayth|
|DL3||Mt Surprise||Walkers Limited||571||23 June 1961||18 January 1988||Preserved operational, Australian Railway Historical Society, Rosewood Railway Museum|
|DL4||Almaden||Walkers Limited||572||30 June 1961||Operational with Queensland Rail|
- QGR/Stephenson-Hawthorns/Walkers – DL Class Queensland's Railway Interest Group
- Oberg, Leon (2007). Locomotives of Australia: 1850s-2007. Rosenberg Publishing. p. 217. ISBN 1877058548.
- Clark, Peter (2012). An Australian Locomotive Guide. Rosenberg Publishing. p. 319. ISBN 9781921719554.
- Diesel Locomotives Association of Tourist Railways Queensland 13 March 2011
- DL Class Queensland's Great Trains