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The objective of this paper is to analyze aerodynamic characteristics and aircraft stability of TEagle Eyes X-II mini UAV by using Computational Fluid Dynamics (CFD) in range of low Reynolds number about 500,000 - 800,000. TEagle Eyes X-II is designed to be able to fly according to the required performance and predetermined mission, which can take off by hand-launched or by using catapult and land by gliding and descending to the ground. The analysis results can confirm the trend of TEagle Eyes X-II capabilities, which are defined in the conceptual design process, one of the process of research, development and construction of mini UAV. More efficient operation in tactical missions will be obtained, and the design of mini UAV, which meets the operational requirements of intelligence, surveillance and reconnaissance missions will be acquired. In addition, the knowledge gained will continue to serve as information on the research and development of the Royal Thai Air Force's Mini UAV that can support other missions.
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