We supply Kraftwerk’s TUBES to Sky-Watch exclusively for the development of fixed wing drones. Those drones are supposed to fly for up to 24 hours with one charge. The most important things for unmanned aerial vehicles (UAV) like drones is a small, lightweight propulsion system with a big energy density to allow long range flights. Based on LNG or lighter gas as a fuel, these drones can be operated word wide available gas cartridges. Sky-Watch develops drones for mapping and surveillance.