took over all steam-train haulings. The red railmotors appeared on the branch in 1928–1929, starting with the 45 horsepower version and gravitating through the 50 horsepower diesel type to the 100-120 horsepower versions, which operated most of the railcar services throughout the 1940s. From 1961 onwards, these railcars were replaced with the 2000 class railmotors. In 1966, Walkers Ltd. of Maryborough built a B-B diesel-hydraulic locomotive, the first of its kind, as an experiment, offering it to Queensland Railways on a trial basis. The trial took place on the Hervey Bay railway line. The locomotive was successful, and became the forerunner to the DH-class locomotive. After the demise of the steam trains in 1966–1967, the DH class initially worked most of the locomotive-hauled trains, with the occasional appearances from 60-ton diesel-electric units which were allowed on the branch from 1966. They became the normal motive power on the branch until its closure. See also Rail transport in Queensland References External links 1925 map of the Queensland railway system Railway lines opened in 1896 Railway lines closed in 1993 Closed railway lines in Queensland Mining railways in Australia 3 ft 6 in gauge railways in Australia Coal mining in Queensland Railway