縦揺れ静安定性と飛行経路ダイバージェンスおよびタック・アンダー現象の安定判別

概要

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This paper discusses problems in the definition for static pitch stability or longitudinal static stability of aircrafts. So far "C _<ma><O" is used as its definition, but C_<ma> is one of important aerodynamic characteristics and is not the direct definition for static pitch stability. This paper proposes that "dM/dθ<O" should be used as the definition of static pitch stability, where M is the pitching moment. A general criterion for static pitch stability is deduced from the definition " dM/dθ<O". From this criterion, " C_<ma><O" is deduced as the stable condition in the case of normal flight conditions. Furthermore, this criterion gives the conditions that "flight-path divergence" phenomenon in high angle of attack region and "tuck-under" phenomenon in transonic flight region occur.
東海大学の論文