• Journal of the KSME
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• v.22 no.1
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• pp.2-8
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• 1982

오늘날, 자원 에너지의 절약이 요구되는 사회적 경제적 입장에서, 또한 석유위기를 맞이하여 유 기되는 경량화 문제의 대응책으로서 기계, 기기 및 구조물의 경량화가 절실히 요구되고 있다. 경량화는 구조물이 가진 전체로서의 기능 및 그것을 만들기 위한 생산성의 향상에 기초를 둔 경제성에 관계하고 있기 때문에 경제성을 무시한 경량화는 있을 수 없고, 항공기분야로부터 시 작한 경량화의 여파는 자동차, 철도차량, 선박관계까지 침투하고 있다. 특히 자동차업계에서는 안전성과 경제성을 양립시키는 자동차 정량화의 대응책으로서 차의 소형화 및 경량재료의 전환에 박차를 가하고 있다. 본고에서는 복합조직간의 의의 및 자동차 경량화 재료로서의 실용화에 관한 기술적 동향에 관하여 기술한다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.18 no.4
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• pp.21-29
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• 2010

The main purpose of this study is to obtain linear models for the design of automatic flight controller in order to operate the Light Sport Aircraft as unmanned air vehicle. Flight test equipments installed on the aircraft to acquire flight test data are described and maneuvers for practical speed calibration are introduced. Parameters for the linear models of lateral and longitudinal motion are estimated by the Output error method as well as trim data analysis using the flight test data. Simulated data using the estimated parameters is shown to agree well with the measurement data. Estimated parameters obtained for several flight conditions can be used to improve the aerodynamic database of the simulation program.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.18 no.3
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• pp.84-91
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• 2010

New aircraft category such as Light Sport Aircraft is introduced to prevent Ultralight Vehicle accidents and to promote aviation sports. Therefore, a new rule for airworthiness standard, certification, operation and maintenance of light sport aircraft is being created. The present study deals with LSA concept, development trend of LSA, airworthiness standards and certification policy. In particular, an aircraft type analysis of FAA certified LSA is conducted to establish performance requirements of Light Sport Aircraft designs.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.18 no.3
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• pp.70-76
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• 2010

In this study, we surveyed the operating status of the Light Sport Aircraft(LSA) in Korea, and reviewed the minimum requirements of the airpark for LSA. We are discuss about increased aerodrome traffic density and safety improvement, through the installation of the exit taxiway. The shape of the exit taxiway of an airpark used in LSA is a rectangle for usable two way direction of runway. The array types of exit taxiway influence paved and unpaved runway occupancy time of LSA.

• Journal of Korea Foundry Society
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• v.28 no.4
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• pp.175-178
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• 2008

우주선, 항공기, 수송차량 등은 기능은 집적 다양화 그리고 성능의 고도와 됨에 따라 에너지 효율성을 위해 구조부재의 경량화가 중요성은 증가되고 있다. 경량화 구조부재 재료 중에는 알루미늄 합금, 세라믹, 복합재료 등이 개발되어 우주선, 항공기, 수송차량 구조부재에 적용하기 위한 많은 연구가 이루어지고 있다. 이들 중, 20세기 초 알루미늄합금이 초 경량화 구조부재로서 많이 이용되었다. 본 논문에서는 경량화 재료 중 이방성을 가지는 복합재료를 구조부재에 적용하였다. 그러나 구조부재에 적용되기 위한 이방성 복합 재료는 강한 충격 이후 취성의 특징 때문에 하중과 흡수에너지가 급속히 감소하는 단점을 가지고 있다. 그래서 이방성 복합재료의 각 층간을 완전히 접합하여 성질이 매우 우수한 부재를 제작할 수 있는 Autoclave 성형법으로 제작하였다. 이방성 복합재료 중 CFRP를 설계 메커니즘 변수에 따라 Autoclave 성형을 하고 하중과 흡수에너지가 높음 평가하기 위해 굽힘실험을 하였다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.21 no.1
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• pp.57-61
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• 2013

In the present study, which is currently operating domestically and internationally, from the Technical Standards for Flight Safety of Light Sport Aircraft and certification system through a comparative analysis of the LSA Category Airworthiness Certifications documents. In particular, an aircraft type analysis of FAA certified S-LSA that the speed greater than 120 knots LSA manufactured without United States of America. Through the analysis, we presented a revised plan to activation of the domestic aviation leisure sports and the development of the Light Sport Aircraft industry in reality.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.24 no.3
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• pp.19-25
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• 2016

In this study, we surveyed the Marado status of the availability of emergency runway for the LSA, through site visits. For the future progress Marado flight tour operation, for LSA of 4 models with respect to just in case there was an emergency situation analysis of the availability of emergency runway. We analyzed the problems of the sloping runway with the changing elements for the kinetic and potential energy. The Bingo and CH-650 models of LSA are usability emergency runway of Marado for take-off and landing. But the AT-4 and CTLS models of LSA are limited or impossible to use emergency runway of the Marado.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.21 no.3
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• pp.41-45
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• 2013

In this study, we surveyed the operating status of the Runway for the Light Sport Aircraft(LSA) in Korea, and analyzed the Airfield Facilities Manual for the Air Leisure and the Standard Specification for Recreational Airpark Design. Based on the information, we presented the displacement of the threshold concept, to ensure the Runway Length and the Runway Safety Area, and operation of LSA in Korea.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.20 no.3
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• pp.57-62
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• 2012

In this study, changes depending on the Airparks for LSA(Light Sport Aircraft) and Ultralight vehicle flight restricted areas, the flight route for LSA in Korea was redesigned. Considerations for LSA operating limits of VFR and complex airspace conditions in Korea, and that links the Airparks for LSA is to redesign the proposed.

• Journal of Advanced Navigation Technology
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• v.19 no.5
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• pp.379-388
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• 2015

In the end of 1990's, future free flight technology had been developed and tested in America and government established the plan for free flight until 2017. Aircraft separation assurance must be secured essentially to avoid collision between aircrafts before Free Flight comes true. Now, Civil aircraft has rules about avoidance activity with traffic collision avoidance system (TCAS) but it can't apply to light aircraft. So there is a need about alternative method to apply light-aircraft because it has space and price problem to use TCAS. In this paper, TCAS algorithm has been modified and verified by simulating with LABVIEW program under ADS-B condition to get miniaturization and weight lighting cheaply. By simulating, collision alert algorithm is analyzed and verified with collision situation proposed by ICAO, and 100% checked for performing the alert announciation on all cases by TCAS standards.