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Developing High Altitude Long Endurance (HALE) Solar-powered Unmanned Aerial Vehicle (UAV)

고고도 장기체공 태양광 무인기 개발

  • Hwang, SeungJae (Korea Aerospace Research Institute, Aerodynamics Research Team) ;
  • Kim, SangGon (Korea Aerospace Research Institute, Aerodynamics Research Team) ;
  • Lee, YungGyo (Korea Aerospace Research Institute, Aerodynamics Research Team)
  • 황승재 (한국항공우주연구원 항공연구본부 공력성능연구팀) ;
  • 김상곤 (한국항공우주연구원 항공연구본부 공력성능연구팀) ;
  • 이융교 (한국항공우주연구원 항공연구본부 공력성능연구팀)
  • Received : 2015.11.24
  • Accepted : 2016.03.02
  • Published : 2016.03.31

Abstract

Korea Aerospace Research Institute (KARI) is developing an electric-driven HALE UAV in order to secure system and operational technologies since 2010. Based on the 5 years of flight tests and design experiences of the previously developed electric-driven UAVs, KARI has designed EAV-3, a solar-powered HALE UAV. EAV-3 weighs 53 kg, the structure weight is 21 kg, and features a flexible wing of 19.5 m in span with the aspect ratio of 17.4. Designing the main wing and empennage of the EAV-3 the amount of the bending due to the flexible wing, 404 mm at 1-G flight condition based on T-800 composite material, and side wind effects due to low cruise speed, V_cr = 6 m/sec, are carefully considered. Also, unlike the general aircraft there is no center of gravity shift during the flight. Thus, the static margin cuts down to 28.4% and center of gravity moves back to 31% of the Mean Aerodynamic Chord (MAC) comparing to the previously developed scale-down HALE UAVs, EAV-2 and EAV-2H, to minimize a trim drag and enhance a performance of the EAV-3. The first flight of the EAV-3 has successfully conducted on the July 29, 2015 and the test flight above the altitude 14 km has efficiently achieved on the August 5, 2015 at the Goheung aviation center.

Keywords

References

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Cited by

  1. Development of Hybrid Propulsion System and Ground Verification Test for Solar-powered UAV vol.22, pp.4, 2018, https://doi.org/10.6108/KSPE.2018.22.4.133