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By Geoffrey H. Bourne

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Extra info for Medical and Biological Problems of Space Flight. Proceedings of a Conference Held in Nassau, the Bahamas, November, 1961

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Battleships, jet engines vs. propellers, horse cavalry vs. tanks, gunpowder vs. bows and arrows. Notice as the examples recede into history, a certain doubt arises as to the basic validity of the statements. There simply is not always a major place for everything. We are aware that the bow and arrow was used effectively in special applications in World War I I , but we doubt seriously that the U . S. Marine Corps is training knights in armor. If anyone wishes to choose the middle ground, he is, we believe, honor bound to try 50 τ .

SMITH, Ε. Β. KONECCI, AND Μ . W . HUNTER Intuitively, the designers felt that combining the requirement for the recovery of the complete vehicle with the acceleration and deceleration restriction of 2 ^'s for normal operations and up to 4 ^'s for emergency entry or abort situations was prohibitive. It has never been done, and reentry problems on ballistic missiles have been considered an immense thermodynamic problem. Investigations have shown that the large size of R I T A , and the low density of the empty hydrogen tanks, result in comparatively moderate heating on entry.

THE DEVELOPMENT OF M A N N E D SPACE VEHICLES 39 the docking maneuver would occur (Fig. 31), followed by the injection into lunar trajectory (Fig. 32). In addition, a second approach was inves­ tigated which would rely on the gigantic Nova carrier vehicle (Fig. 33) whose first stage thrust would be well over 10,000,000 lb. It would be capable of making a direct Earth-to-Moon flight. Neither of these two modes was finally selected, though both are still being studied as possible backups to the preferred technique, known as the lunar orbital rendezvous mode.

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