Zero lift trajectory

Japanese: zero lift trajectory(英語表記)zerolifttrajectory
Zero lift trajectory

…In the first stage, which rises through dense atmosphere, the vehicle's axis is oriented almost in the direction of the airflow to prevent excessive loads on the vehicle due to aerodynamic forces. This type of trajectory is called a zero-lift trajectory. In the second and subsequent stages, which fly in a vacuum, the vehicle's axis (and therefore the direction of thrust) can be chosen relatively freely, so trajectory control is performed to minimize fuel consumption. …

*Some of the terminology that refers to "zero lift trajectory" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…濃厚大気中を上昇する第1段では機体軸をほぼ空気流の方向に向け,機体に空気力による過大な荷重がかからないようにする。このような軌道は無揚力軌道zero lift trajectoryと呼ばれる。真空中を飛行する第2段以降では機体軸の方向(したがって推力の方向)を比較的自由に選べるので,燃料消費が最小となるような軌道制御が行われる。…

※「zero lift trajectory」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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