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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 Range (aircraft) ： ウィキペディア英語版 Range (aeronautics) The maximal total range is the distance an aircraft can fly between takeoff and landing, as limited by fuel capacity in powered aircraft, or cross-country speed and environmental conditions in unpowered aircraft. Ferry range means the maximum range the aircraft can fly. This usually means maximum fuel load, optionally with extra fuel tanks and minimum equipment. It refers to transport of aircraft for use on remote location without any passengers or cargo. Combat range is the maximum range the aircraft can fly when carrying ordnance. Combat radius is a related measure based on the maximum distance a warplane can travel from its base of operations, accomplish some objective, and return to its original airfield with minimal reserves. The fuel time limit for powered aircraft is fixed by the fuel load and rate of consumption. When all fuel is consumed, the engines stop and the aircraft will lose its propulsion. For unpowered aircraft, the maximum flight time is variable, limited by available daylight hours, aircraft design (performance), weather conditions, aircraft potential energy, and pilot endurance. The range can be seen as the cross-country ground speed multiplied by the maximum time in the air. The range equation will be derived in this article for propeller and jet aircraft. ==Derivation== If the total weight of the aircraft at a particular time $t$ is $W$ = $W\_e\; +\; W\_f$, where $W\_e$ is the zero-fuel weight and $W\_f$ the weight of the fuel, the fuel consumption rate per unit time $F$ is equal to $-\backslash frac\; =\; -\backslash frac$. The rate of change of aircraft weight with distance $R$ is $\backslash frac=\backslash frac\}\}=\; -\; \backslash frac$, where $V$ is the speed, so that $\backslash frac=-\backslash frac\}$ It follows that the range is obtained from the definite integral below, with $t\_1$ and $t\_2$ the start and finish times respectively and $W\_1$ and $W\_2$ the initial and final aircraft weights $R=\; \backslash int\_^\; \backslash frac\; dt\; =\; \backslash int\_^\; -\backslash fracdW\; =\backslash int\_^\backslash fracdW$. The term $\backslash frac$ is called the specific range (= range per unit weight of fuel). The specific range can now be determined as though the airplane is in quasi steady state flight. Here, a difference between jet and propeller driven aircraft has to be noticed. 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「Range (aeronautics)」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.