A major problem with operations of lifting reentry vehicle having and aft center-of-gravity location due to large engine mass at the rear is the required hypersonic trim to fight the desired trajectory. This condition is most severe for lifting maneuvers. As a first step toward analyzing this problem, this paper considers the lift requirement for some basic maneuvers in the plane of a great circle. Considerations are given to optimal lift control for achieving the maximization of either the final altitude, speed or range. For the maximum-range problem, phugoid oscillation along an optimal trajectory is less severe as compared to a glide with maximum lift-to-drag ratio. An explicit formula for the number of oscillations for an entry from orbital speed is proposed.
Phugoid oscillations in optimal reentry trajectories
1981-04-01
Miscellaneous
No indication
English
Phugoid oscillations at hypersonic speeds
AIAA | 1964
|Phugoid oscillations at hypersonic speeds
AIAA | 1965
|Phugoid oscillations at hypersonic speeds
Engineering Index Backfile | 1965
|Comments on Phugoid Oscillations at Hypersonic Speeds
AIAA | 1966
|Phugoid Motion for Grazing-Entry Trajectories at Near-Circular Speeds
Online Contents | 1996
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