The heated air under a big sail, coated with solar heat panels and photovoltaic films, operates as boosting power to lift up the system. In principle the structure runs as a directly operated ballonet. A network on the bottom side serves as a stabilizing structure and contains all control parts for the navigation system. Powered by photovoltaic energy, it delivers all informations about postion-fixing and the directions to pilote the booster safely to the target-location. Flying in low altitude, an attached container includes all requested goods for the client.