Per Queensland Railway's classification system they were designated the D17 class, D representing they were a tank locomotive, and the 17 the cylinder diameter in inches. They were the only Queensland Railways class to be fitted as a whole, from new, with two sand-domes. They were restricted to the Brisbane suburban area with boundaries of Ipswich, Ferny Grove, Pinkenba, Shorncliffe, Petrie, Kingston and Lota. This area was later extended beyond Ipswich to Grandchester. Initially, all were attached to Mayne depot but later several were transferred to Woolloongabba. Cylinder and steam chest castings are identical to C17 Class. The ‘6’ was dropped from the classification in 1937. The engines were often unofficially referred to as ‘black tanks’ after the introduction of the DD17 class. Engines constructed in 1937 had boilers with a pressure of . Earlier engines were altered to that pressure as they passed through workshops. A wooden crate was fixed to the centre of the bunker to slightly increase the coal capacity from the original . Engines of this class were some of the last to receive electric headlights due to them being restricted to running in the Brisbane suburban area. Fitting of electric headlights commenced in 1951. The entire class was displaced from suburban duties by diesels during the 1960s. The first was withdrawn in November 1961 with the bulk of the class withdrawn during 1967 and 1968. Two have been preserved:      Rankin Octagonal Barn  Rankin Octagonal Barn is a historic octagonal barn located near Silverton, Jackson County, West Virginia. It was built about 1890, and is an eight-sided frame structure covered with vertical wide board siding. Each side of the octagon measures 24 feet in length. It features a central cupola to provide light and ventilation. It was listed on the National Register of Historic Places in 1985. Bronchopleural fistula  A bronchopleural fistula (BPF) is a fistula between the pleural space and the lung. It can develop following pneumonectomy, post-traumatically, or with certain types of infection. It may also develop when large airways are in communication with the pleural space following a large pneumothorax or other loss of pleural negative pressure, especially during positive pressure mechanical ventilation. On imaging, the diagnosis is suspected indirectly on radiograph. Increased gas in the pneumonectomy operative bed, or new gas within a loculated effusion are highly suggestive of the diagnosis.