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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Propellant mass fraction ： ウィキペディア英語版 Propellant mass fraction In aerospace engineering, the propellant mass fraction is the portion of a vehicle's mass which does not reach the destination, usually used as a measure of the vehicle's performance. In other words, the propellant mass fraction is the ratio between the propellant mass and the initial mass of the vehicle. In a spacecraft, the destination is usually an orbit, while for aircraft it is their landing location. A higher mass fraction represents less weight in a design. Another related measure is the payload fraction, which is the fraction of initial weight that is payload. ==Formulation== The propellant mass fraction is given by: :$\backslash zeta\; =\; \backslash frac$ And because, :$m\_0\; =\; m\_f\; +\; m\_p$ it follows that: :$\backslash zeta\; =\; \backslash frac\; =\; \backslash frac\; =\; 1\; -\; \backslash frac$ Where: :$\backslash zeta$ is the propellant mass fraction :$m\_p$ is the propellant mass :$m\_0$ is the initial mass of the vehicle :$m\_f$ is the final mass of the vehicle 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「Propellant mass fraction」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.