Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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A Trade-Off Study of the Number of Engines for Fighter Characteristics

엔진 수에 따른 전투기 특성 비교분석연구

  • Published : 2003.08.01
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Abstract

The number of engines for fighters has been decided by thrust required and available engines at the time since the beginning of the jet age. However, many factors such as combat effectiveness, survivability, performance, and cost were considered as engine technology has been progressed. From the vietnam war and desert storm, a twin engine fighter was shown slight superiority to a single engine one in an vulnerability，but single engine fighters were a little predominant in susceptibility This paper includes the trade-off study results on the number of engines for the supersonic light attack aircraft with single and twin engines. Twin engine configuration is 8%, 26%, and 13% higher than single engine one in MTOGW, Flyaway Cost, and LCC respectively. Little difference has been found in RM&S, Maneuver and field performance. According to the factors above, single engine fighter is profitable for low class and twin engine one for medium and higher class.

전투기에 장착되는 엔진의 수는 필요한 추력과 가용엔진에 의해 대부분 결정되어 왔으나, 엔진 기술의 발달로 임무성능-체계분석-경제성 등이 중요한 고려요소가 되었다. 베트남전과 걸프전의 실전사례 분석 결과 안전성과 취약성은 쌍발기가, 피격율은 단발기가 다소 우수한 것으로 평가되었다. F404-GE-400과 F-125 엔진을 장착한 초음속 경공격기를 설계하여, 엔진 수에 따른 비교연구를 수행하였다. 쌍발기 형상이 최대이륙중량 8%, Flyaway Cost 26%, LCC 13% 정도 컸으며, 단발기 형상이 기동-저속성능과 RM&S 성능이 다소 우수하였으나 큰 차이는 없었다. 전투기의 획득시 저급(Low) 전투기는 단발엔진을, 중급이상(Med.+)의 전투기는 쌍발엔진을 적용하는 것이 체계분석-경제성-운용개념 등을 고려한 여러 측면에서 유리할 것으로 판단된다.

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