Delft Aerospace Rocket Engineering is a student-run society within Delft University of Technology, with over 190 members. The main focus of the student group is the development of rocket technology on a non-profit basis. All development, from engines to electronics, is done in-house. Although several projects take place in DARE, the group's two flagship projects are Stratos and Project Sparrow. Stratos includes the Stratos I rocket which was launched in 2009 and set the European altitude record for amateur rocketry at 12.5 km. The follow-up of this rocket was the Stratos II+, which was launched on 16 October 2015, reaching an altitude of 21.5 km and breaking the European altitude record. In summer of 2018, Stratos III was launched, disintegrating 20 seconds after the launch. Its successor, Stratos IV, is currently in development. Project Sparrow is the newest project, working on a liquid-fueled rocket engine, which will be designed to go beyond the Kármán line. Even though DARE cooperates with the military to safely conduct launch campaigns, DARE's technology is strictly non-military. Approximately 70 percent of members come from the Faculty of Aerospace Engineering of Delft University of Technology, with the remaining 30% coming from other faculties, including Mechanical Engineering, Electrical Engineering, Applied Physics and Industrial Design. DARE also features a very high number of international students, with about half of the students coming from outside the Netherlands.