Progress of super-pressure balloon development: A new “tawara” concept with improved stability |
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| Authors: | H. Fuke N. Izutsu D. Akita I. Iijima Y. Kato J. Kawada K. Matsushima Y. Matsuzaka E. Mizuta M. Namiki N. Nonaka S. Ohta Y. Saito T. Sato M. Seo Y. Shoji A. Takada K. Tamura M. Toriumi K. Yamada T. Yamagami T. Yoshida |
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| Affiliation: | 1. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 252-5210, Japan;2. The Fujikura Parachute Co. Ltd., Shinagawa, Tokyo 142-0063, Japan |
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| Abstract: | The super-pressure balloon (SPB) has been expected to be a flight vehicle that can provide a long flight duration to science. Since 1997, we have developed the SPB. Now we are at the phase of developing an SPB of a practical size. In 2009, we carried out a test flight of a pumpkin-shaped SPB with a 60,000 m3 volume. The undesirable result of this flight aroused us to resolve the deployment instability of the pumpkin-shaped SPB, which has been known as one of the most challenging issues confronting SPB development. To explore this deployment issue, in 2010, we carried out a series of ground tests. From results of these tests, we found that an SPB design modified from pumpkin, named “tawara”, can be a good candidate to greatly improve the deployment stability of the lobed SPB. |
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| Keywords: | Scientific balloon Stratosphere Super-pressure Tawara Membrane structure Deployment stability |
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