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SHEFEX (Sharp Edge Flight Experiment), is an experiment conducted by the German Aerospace Center (DLR), for the development of some new, cheaper and safer design principles for space capsules, hypersonic vehicles and spaceplanes with re-entry capability in the atmosphere and their integration into a complete system. DLR explained the objectives of SHEFEX: The aim of the research is a spaceplane that is usable for experiments under microgravity from 2020 on. It is set to finish with a space plane project named REX Freeflyer(REX for Returnable experiment, dt. Rückkehrexperiment).〔(Seite des Institut für Bauweisen- und Konstruktionsforschungder DLR über das Projekt REX-Free Flyer ), Retrieved 2012-06-28〕 During re-entry of spacecraft into the earth's atmosphere, the high velocity of the spacecraft together with friction and displacement of air molecules leads to temperatures of over 2000 °C.〔 In order to not burn up, spaceships need very expensive and sometimes failing heat shields. ==First spacecraft with sharp corners and edges== The namesake idea for the sharp-edged flight experiment of Hendrik Weihs, coordinator for returning technologies DLR, is an entirely new form for a spacecraft, namely with sharp corners and edges instead of the rounded shapes ubiquitously used in space flight today. Few flat tile shapes can be produced at lower cost than highly individual rounded shapes.〔 Dr. Klaus Hannemann, Head of the spacecraft department at the DLR Institute of Aerodynamics and Flow Technology in Göttingen explains the fundamental advantage of the concept: Additionally, the project is aimed at improving aerodynamics. General Project Manager Hendrik Weihs said: Programmatically, the DLR, said: . 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sharp Edge Flight Experiment」の詳細全文を読む スポンサード リンク
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