Abstract
Many bridges had been constructed during the steep economic growth age. Presently, dealing with the deterioration of those bridges and maintaining them have become very important. Using robots for the bridge inspection to aim at the labor saving and lowering the cost is useful for the management and maintenance of many old bridges because the conventional method will intensify the strains on the economy. In this study, we created a flying robot HORNET with tilt-rotors and two wheels that can inspect cracks and corrosion in concrete bridge substructures. We confirmed that the relationship between the state of wall surface and the power consumption of the robot.