• 한국패션뷰티학회지
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• 제5권3호
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• pp.105-110
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• 2007

With the beginning of seventeenth century, the men in France royal palace began to wear wigs and by eighteenth century wig became sole possession of men. Then, it had been become a satire thing filling one side of the era with the pouf that had been for women. All these things were closely related with the unstable social situation. The bourgeoisie expressed the anger for the privilege that come from the disparity of class consciousness. The reaction against the discriminative treatment by the illuminists stimulated the outbreak of the French Revolution on 14th, July in 1789. This paved way of characterizing the wig styles of the time. The symbolism of cultural-historical meaning in the west is not confined only in Europe. The worship of hair that is different from one cultural area to another had started with their own unique taboo consciousness and had developed to the form speaking for the expression of masculine, the symbol of man power and the extravagance of the privileged class.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2008년 영문 학술대회
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• pp.810-812
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• 2008

Previously study on structural design of the main wing of the twenty-seat class WIG(Wing in Ground Effect) craft. In the final design, three spars construction was selected for safety in the critical flight load, and the Carbon-Epoxy material was selected for lightness and structural stability. In this study, the forced vibration analysis was performed on the composite main wing structure of the twenty-seat class WIG craft with two-stroke pusher type reciprocating engine. The vibration analysis based on the finite element method was performed using a commercial FEM code, MSC/NASTRAN. Excitations for the frequency response analysis were assumed as the H-mode(horizontal mode), the V-mode(vertical mode) and the X-mode(twisted mode) which are typical main vibration modes of engine. And excitations for the transient response analysis were assumed as the L-mode(longitudinal mode) with the oscillating propeller thrust which occurs in operation. According to the result of forced vibration analysis, structural design was modified to reduce the vibrations.

• 한국항공운항학회지
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• 제29권3호
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• pp.24-33
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• 2021

Although it is the first transportation method to apply the 'Ground Effect' applied to aircraft to ships, WIG ships, which are classified as 'Ships' operating on the water under international law. The pilot aptitude test, which has the effect of preventing safety accidents in advance, has not yet been established as a legal system in S. Korea, after being certified by the Korean Register of Shipping (KR) for the first time in the world in March 2020. Therefore, the purpose of this study is to ensure that identifying the importance, recognition, correlation, etc. of the tools and items of aptitude testing, from a group of experts, can be used appropriately for future development of legal aptitude testing tools. As a method of study, the questionnaire method was used, and the analysis confirmed that the tools used on aircraft and ships could be used appropriately. In particular, Due to the characteristics of the WIG ships, it was confirmed that it is necessary to develop more specifically in the future, the operational qualifications and physical fitness items, which are the aptitude evaluation items.

• 대한기계학회논문집B
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• 제34권6호
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• pp.649-654
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• 2010

DUP (direct underside pressurization)-장치와 프로펠러가 있는 3 차원 형상의 위그선(WIG-craft) 주위의 유동특성을 수치적으로 해석하였다. 이를 통하여 위그선 주위의 공기역학 관점의 힘들과 모멘트에 대해 고찰하였다. 이 연구의 해석에 사용된 모델은 프로펠러, 동체, 날개와 동체아래의 압력실 (air chamber)을 포함한 전 영역에 대하여 수행하였다. DUP 장치는 추력의 일부를 동체 아래의 압력실에 정체시킴으로 이륙 시와 같이 낮은 속도에도 효과적으로 양력을 증가시켜 이륙 속도를 줄이는 장치이다. 이러한 DUP 장치는 동압의 증가로 인하여 항력이 증가하고 공기의 회전성분으로 인하여 추가적인 모멘트를 생성하게 된다. 위그선의 비대칭 유동에 의해 발생하는 요잉 및 롤링 모멘트가 위그선의 안정성에 미치는 영향은 매우 미미하였다.

• 대한조선학회논문집
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• 제34권1호
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• pp.60-67
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• 1997

본 논문은 WIG 무인 조종 시험선, '한진1호'와 '한진2호'의 날개에 대한 3차 시험 결과를 수록하고 있다. 지난 95년 5월에 당 연구소에서는 '한진1호'를 설계 제작하여 시험비행에 성공하였으며, 아울러 지면효과에 따른 공기역학적 특성을 파악하기 위하여 풍동에서 여러가지 날개단면에 대한 양력 및 항력을 계측하였다. 이 실험결과에 의하면 지면에 가까워질수록 양력 및 양항비는 증가되지만, 그 특성들은 주로 날개 단면의 형상에 영향을 받고 있음을 알 수 있었다. 따라서 본 논문에서는 우선 '한진1호'에 사용된 NACA6409 익형과 러시아에서 WIG선용으로 개발한 DHMTU계열의 익형 2종을 선택하고, 풍동실험을 통하여 그들의 양력 및 항력 특성을 비교하였다. 특히 본 실험에서는 종방향 운동에 대한 안정성을 파악하기 위해서 피칭모멘트를 계측 비교하였다. 실험결과에 의하면 피칭모멘트의 절대값은 코오드 길이의 1/4 에서 NACA6409 보다 DHMTU 계열이 적게 계측되었다.

• 대한조선학회논문집
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• 제43권1호
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• pp.134-146
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• 2006

This paper presents the primary conceptual design results of twenty-passenger class Wing-In-Ground(WIG) effect craft. As a first step, top level requirements were proposed and principal dimensions were determined. Maximum speed in ground effect condition is 150 km/h with two tons payload including passengers. Total weight is estimated as 8.5 tons with 2 tons of thrust. Hull and airfoil sections were designed and self propulsion tests were performed by radio controlled model. Two planing hull forms with the transom stern were proposed and towing tests were performed. The resistance and running attitude were measured and the feasibility is checked for the prototype hull form of the twenty-passenger class WIG craft. The free running tests show the stable smooth running attitude at designed speed. Also this radio controlled model can take off around 0.15 meter wave height. It can be said that the top level requirement for the twenty passenger class WIG ship is satisfied successfully. The design optimization to increase the transport efficiency and safety will be performed in the near future.

• 항공우주정책ㆍ법학회지
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• 제35권3호
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• pp.95-126
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• 2020

2017년 우리나라에서 세계 최초로 수면비행선박인 위그선(WIG, Wing In Gound)의 조종사 면허 필기자격시험을 시행하였다. 수면비행선박은 선박과 비행기의 특성을 융합한 차세대 운송수송 수단이어서 항공기 조종사 자격증명과 6급 이상의 항해사 면허를 함께 보유한 자만이 해당 조종사에 지원할 수 있도록 하였다. 수면비행선박 조종사 면허제도는 우리나라가 처음 도입한 것이어서 면허 제도와 체계에 대한 국제적 표준은 아직 없고, 국내 자격제도 도입 역시 여러가지 개선사항이 요구된다. 해외에서도 현재까지 개발 중이거나 상용화 성공사례를 손으로 꼽을 정도이나 우리나라에서 국제적인 선박 공인 기관인 한국선급에서 2020년 3월에 정식으로 선급 인증을 하였다. 법적인 정식 명칭은 "수면비행선박"이고 항공기와는 이미 국제법적으로 분류가 되어 차세대 운송수단으로 주목을 받고 있었다. 그러나 이런 미래의 해양의 성장 동력으로서 가치가 있는 산업이 되기 위해서는 시급한 몇가지 문제점을 해결하여야 하는데 수면비행선박 인력 양성이 바로 그것이다. 하여 본 주제인 조종사 양성에 관한 제도적인 문제를 검토하였다. 2001년부터 세계 여러 나라들이 IMO를 중심으로 논의를 하였고 우리나라도 IMO 회의에 지속적으로 참가 및 공조하여 드디어 2011년부터 수면비행선박 국가자격시험을 시행하였다. 그러나 아직 풀어야 할 문제점이 있어 인력양성 제도선행, 교육훈련 제도, 지정교육기관 제도 등으로 제시하였다. 그에 관한 해결방안으로 면허제도 개선을 통한 방안과 지정교육기관 운영을 통한 방안으로 제시하였다. 이 방안 중에 지정교육기관 운영은 정부가 민간교육기관에게 위탁하는 방안이 가장 합리적인 방안으로 판단된다고 제언하였다.

• 시스템엔지니어링학술지
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• 제5권1호
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• pp.57-65
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• 2009

The purpose of Defense Acquisition Project is that the superior weapons validated needs and performance are supplied to military user with limited financial resources and time. The Warship Acquisition Project is not only like this, But also has special characteristics of long project period and first-constructed ship's operation employment. So, The Warship Acquisition Project need systematic and efficient procedure & management. And this paper researches System engineering application of imaginary WIG(Wing-In-Ground Effect) ship acquisition project based Systems Engineering Handbook ver.3.1 published by INCOSE, the lead of field. The Imaginary WIG(Wing-In-Ground Effect) ship acquisition project applied the four processes(technical project, Enterprise & Agreement, Enabling Systems), the basis of INCOSE Engineering Handbook ver.3.1, and the each process output compared with DAPA(Defense Acquisition Program Administration)'s warship acquisition procedure.

• 대한기계학회논문집B
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• 제33권12호
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• pp.961-967
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• 2009

A 3-dimensional numerical investigation of a WIG effect vehicle with DUP (direct underside pressurization) is performed to predict aerodynamic characteristics and the static height stability. DUP can considerably reduce take-off speed and minimize the hump drag while the vehicle accelerates on the water to take off. The DUP of the model vehicle, Aircat, consists of a propeller in the middle of the fuselage and an air chamber under the fuselage. The air accelerated by the propeller comes into the camber through the channel in the middle of fuselage and augments lift by changing its dynamic pressure to static pressure dramatically. However, the air accelerated by a propeller produces excessive drag and reduces static height stability.

• 항공우주시스템공학회지
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• 제1권1호
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• pp.36-44
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• 2007

This study was performed on preliminary structural design of a small scale WIG craft which has been developed as a next generation high speed maritime transportation system in Korea. A composite structure design using the foam-sandwich for main wing and tail fins and the honeycomb sandwich and skin-stringer-ring frame for fuselage was applied for weight reduction as well as structural stability. A commercial FEM code, NASTRAN for was utilized to confirm the structural safety for the reiterate design modifications to meet design requirements including the target weight. Each main wing was jointed with the fuselage by eight high strength insert bolts for easy assembling and disassembling as well as for assuring the required 20 years service life. For control surface structural design, the channel type spar, the foam sandwich skin and the lug joint were adopted.