Titlebook: Space Flight and Re-Entry Trajectories; International Sympos Paul A. Libby Conference proceedings 1962 Wien · Springer-Verlag 1962 astronau

话

愤愤不平

nerve-sparing

Optimal Intermediate-Thrust Arcs in a Gravitational Fieldion is examined in detail and the question of whether a transfer between two .ian orbits via such a spiral can ever be more economical than a two-impulse transfer is considered but not finally resolved.

犬儒主义者

懦夫

丑恶

抛物线

Aerodynamics of Trajectory Control for Re-Entry at Escape Speedre-entry vehicle capable of meeting the aerodynamic requirements for range control are discussed briefly. From a fixed-base simulator study for one of these vehicles it is concluded that the typical maneuvers required for range control can be performed satisfactorily by a human pilot with the aid of artificial damping.

抓住他投降

极端的正确性

Problems and Potentialities of Space Rendezvousenalties, and to the use of different sensors (electronic, optical, etc.) in performing the various phases. The paper concludes with an examination of the mission capabilities and benefits that may be brought about through use of rendezvous.

FATAL

Interplanetary Trajectories for Electrically-Propelled Space Vehicles it is found that electrically propelled vehicles can achieve total trip times comparable to those attainable with high-thrust rockets, with weights that may be considerably less than those possible with nuclear rockets.