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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Institution: | 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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