Description Micro helicopter design, vision-based motion estimation and 3D reconstruction without GPS In the sFLY project autonomous micro helicopters are about to play major roles in tasks like search and rescue, security surveillance and law enforcement. The ability to fly allows to avoid obstacles on the ground and to have an excellent bird’s eye view. Their navigational and hovering advantages make them the ideal platform for exploration, mapping and monitoring tasks. Fully autonomous operation in cities or other dense environments involves challenges on all levels of helicopter design, perception, actuation, control, navigation and power supply that have yet to be solved. This project will focus on micro helicopter design, visual 3D mapping and navigation, low power communication and multi-robot control under environmental constraints. It will lead to novel micro flying robots that are: inherently safe due to very low weight; capable of vision-based fully autonomous navigation and mapping; capable of coordinated flight in small swarms in constrained and dense environments.