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Shuttle Liquid Fly-Back Booster to save money, improve safety(flashback)
Flashback....
Liquid Fly-Back Booster "The proposers of the upgrade believe that the LFBBs would improve safety by reducing or eliminating the need for some high-risk abort modes, save $400 million per year in operations costs (with seven shuttle flights per year), and increase the shuttle's payload capacity. The proposers also predict that the LFBB would enable a three-week turnaround time between missions, and (with three sets of LFBBs) could allow the shuttle to fly 15 times per year. Approximately $12 million has been spent by NASA to study the LFBB. Lockheed Martin and Boeing have also funded studies and produced some initial competing design concepts. NASA plans to continue studying the LFBB in preparation for a decision on whether to proceed at the end of year 2000. (Like the five-segment RSRB, the LFBB will be assessed by NASA's Independent Program Assessments Office.) If NASA decides to proceed, the upgrade proposers estimate that hardware fabrication and testing will take four years and will cost about $4 to $5 billion. http://newton.nap.edu/html/upgrading/ch4.htm#fig4_2 (scroll up a little) Also note the plans to remove the hydyrazine powered APUs on the orbiter and boosters. |
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