Queensland Government Rlys 4-6-2 Locomotives in Australia

Class 6D16 (Locobase 9439)

Data from [], last accessed 10 May 2008.

Brisbane suburban traffic had grown steadily and demanded larger engines dedicated to that service. The tank engines (works #67-76) represented by this entry were the QR's response. They were bigger and heavier than earlier locomotives and delivered with Belpaire boilers.

By the early 'teens, Mike Quirk says, the engines had shown defects in both ride and boiler peformance and the design was made over. A four-wheel bogie replaced the trailing truck under the firebox, the Belpaire boiler gave way to a round-top boiler fitted with a standard, "pull-out" regulator and sand boxes and coal bunker capacity was increased.

After that, the class was run into the 1930s on their original assignments, at which point the DD17 took over. More than half the class was worn out by the mid-1940s and retired. The rest lasted until 1951.

Class BB 18 1/4 (Locobase 8584)

Data from Vulcan Foundry Magazine([]). The Vulcan production summary on [] gives the information that 35 of these Pacific locomotives were VF works ##5899-5918 and 5957-5971. Others were built in Australia.

These Pacifics had low axle-loadings and could negotiate quite tight curves.

NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface