Editing Booster engine (section)

===Australia===
In Australia, [[Victorian Railways]] equipped all but one of its [[Victorian Railways X class|X class]] [[2-8-2]] locomotives (built between 1929 and 1947) with a 'Franklin' two-cylinder booster engine, following a successful trial of the device on a smaller [[Victorian Railways N class|N class]] [[2-8-2]] in 1927. From 1929 onwards, [[South Australian Railways]] 500 class [[4-8-2]] heavy passenger locomotives were rebuilt into [[4-8-4]]s with the addition of a booster truck .