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J. KIMS Technol > Volume 15(6); 2012 > Article
Journal of the Korea Institute of Military Science and Technology 2012;15(6):746-753.
DOI: https://doi.org/10.9766/KIMST.2012.15.6.746   
A Study on the Behavior of Skid Gear During the Helicopter Autorotation
Hyung-Tai Choi, Jung-Jin Oh, Geun-Won Kim, Ki-Su Shin
헬리콥터 오토로테이션시 착륙장치 거동에 관한 연구
최형태, 오정진, 김근원, 신기수
국방대학교 국방과학학과
ROK military helicopters are frequently exposed to the hazard situations due to the characteristic of operation. Especially, helicopter accident may lead to critical damage of human and structure. Accordingly, pilots have to train the autorotation procedures and learn the skill to prevent hard landing. In this paper, the behavior of skid gear subject to the helicopter autorotation was conducted by using numerical method. The computer simulation approach by using finite element method was employed to accomplish this goal. Additionally, the behavior of skid gear was evaluated for the different landing conditions. In conclusion, the maximum stress concentration was occurred at the attached area of skid cross-tube to the fuselage. Also, it was revealed that the most proper attitude was level landing to prevent hard landing.
Key Words: Finite Element Method, Autorotation, Hard Landing, Skid Gear


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