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�������պ����ѧѧ�� 2003, Vol. 29 Issue (7) :565-569    DOI:
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���Ʒ�, ��ΰ, ����, �����*
�������պ����ѧ ���˻���, ���� 100083
Calculation of range and endurance of jet aircraft at constant altitude
Zhang Yunfei, Guo Wei, Ma Dongli, Xiang Jinwu*
Research Institute of Unmanned Aerial Vehicle, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� When the thrust coefficients of fuel consumption were constant, the calculation formulas of optimal cruise states (including posture and airspeed) were presented for long-range and long-endurance, and the calculation formula of range and endurance were given when flight strategy held airspeed or posture uniform. The results show that variable posture and airspeed are needed for long-range flight and changeless posture and variable airspeed are needed for long-endurance flight. The example expresses that when the flight parameter is close to the optimal ones, either changeless posture or constant airspeed flight can highly approach long-range or long-endurance flight. When the thrust coefficients of fuel consumption changing with airspeed, the above questions were studied also and the main processes of calculation were given.
Keywords�� voyage distance   flight optimization   jet aircraft   endurance     
Received 2002-04-18;
About author: ���Ʒ�(1964-),��,���ϳ�ɳ��,������, zhangyunfei001@sohu.com.
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���Ʒ�, ��ΰ, ����, �����.�����ɻ��ȸ߶ȷ��еĺ����뺽ʱ����[J]  �������պ����ѧѧ��, 2003,V29(7): 565-569
Zhang Yunfei, Guo Wei, Ma Dongli, Xiang Jinwu.Calculation of range and endurance of jet aircraft at constant altitude[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(7): 565-569
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