Y in the world would you need booster technology? TAO 2014-04-02: To optimize the take off, a booster technology was tested. After successfully descent and some sky tours the TAO-Nauten-Team and the SkyDragon came back home safely. http://www.tao-group.de/en_tec-news.html Only thing I can think of is lets say you take up an additional energy pack (booster) and when it's exhausted, you parachute it back to home base. I wonder......