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By R S Ryan; George C. Marshall Space Flight Center

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Additional info for A history of aerospace problems, their solutions, their lessons

Sample text

The first Jupiter was destroyed due to plume heating that destroyed the control wires, thus causing it to lose attitude control. Two technologies had to be developed and verified: (1) environment prediction, and (2) protection/control of environment. Structural dynamic testing of the full Jupiter vehicle was attempted, but was not very successful due to improper boundary conditions (suspension systems); however, this served as a solid foundation for testing technology developed for Saturn. 20 During the Jupiter development, the interaction between the thrust vector control (TVC) servos and the second bending mode was a major effort.

HEAO Atlas-Centaur. The spacecraft that carried the HEAO experiments was built by TRW Systems. Their role was to design and develop the HEAO spacecraft, to integrate the mission, to support launch operations and to perform flight operations of the in-orbit observations. The basic HEAO A is sketched on figure 27. A sketch of HEAO B is shown on figure 28, while HEAO C is shown in figure 29. The program was very successful, adding greatly to science and our understanding of the universe. 2. Evolution/Innovations/Creativity.

During the 2 weeks, it was possible to show that the modes were indeed false. In a big meeting with Von Braun, the decision was made to launch. The launch was totally successful. Testing approaches and data evaluation are a key element to the success of any program, as was so strongly illustrated here. The Saturn IB was a derivative of the Saturn I with improvements to the structural and propulsion systems, including performance upgrade (fig. 20). The second stage SIVB had a new single liquid hydrogen/lox engine replacing the cluster of RL-10’s in order to get more performance and higher reliability.

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