Project Vesta is a comprehensive research project to investigate the behaviour and spread of high-intensity bushfires in dry eucalypt forests with different fuel ages and understorey vegetation structures. Fire behaviour experiments were conducted during the summer fire seasons of 1998 and 1999 by CSIRO Forestry and Forest Products and the Department of Conservation and Land Management of Western Australia to study aspects of fire behaviour under summer conditions in different fuel structures in dry eucalypt forest. Fire behaviour ranged from slow-spreading surface fires to moderate-intensity fires with sporadic crowning.