Broadcast 2188 (Special Edition)

16 Feb 2014 Dr. John Jurist
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Guest: Dr. John Jurist. Topics: Artificial gravity, spinning, tethers, rotation rates, the gravity gradient & more. Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, http://thespaceshow.wordpress.com. Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use. We do not permit the commercial use of Space Show programs or any part thereof, nor do we permit editing, YouTube clips, or clips placed on other private channels & websites. Space Show programs can be quoted, but the quote must be cited or referenced using the proper citation format. Contact The Space Show for further information. In addition, please remember that your Amazon purchases can help support The Space Show/OGLF. See www.onegiantleapfoundation.org/amazon.htm. We welcomed back Dr. John Jurist for this two hour discussion on all aspects of artificial gravity. Note that Dr. Jurist prepared presentation material for this program which you will find on the archived blog entry for this discussion. Also, I recommend you read the excellent article by our UK guest, inventor, & friend, Robert Walker, "Can Spinning Habs Solve the Zero g Health Issues? Can Humans Live in Mars or Lunar g? Why Nobody Knows." (see www.science20.com/print/129424). During our first segment, Dr. Jurist introduced us to the basics of artificial gravity including the Coriolis effect, the gravity gradient & the info needed from in-space artificial gravity R&D. Several studies including one by UC Irvine were mentioned, plus other bed rest studies. He also talked about the Wyle Centrifuge studies which used a short arm for experimentation. Our attention turned to the presentation material on TSS blog titled "Artificial Gravity Comments--JmJurist." Dr. Jurist took us through the tables & charts on his two page document. He was asked about gender & age differences with gravity as well as small rodent/mammal ISS experiments now or in the future. Our first caller was John from Ft. Worth who clarified some of his comments from the last Open Lines show plus he talked about the hardware, infrastructure, & engineering issues for in-space experiments. We talked about the use of tethers & the relationship with microgravity & radiation issues. With our caller still with us, Jenna emailed asking if either Mars One or Inspiration Mars would provide the needed research that never seems to be done by NASA or others. In the second segment, Doug from S. California called. He talked about his T frame tetherball type structure concept as an interim artificial gravity tool but said it was not a long term solution. He also inquired about tethers, then he wanted to know about the mass of possible tether cables as well as potential materials that could be used for in-space tethers. Doug then described a reference mission using a long arm centrifuge for the surface of the Moon. Doug described a very good concept and Dr. Jurist had much to say about it. We had quite the discussion on possible implementation strategies and the roadmap from theory to operations given our current policy & economic environment, plus the track record on other large projects that never made it. With Doug on the phone, Ft. Worth John emailed to inquire about stability issues and tidal forces on the tether. Both Dr. Jurist & Doug made a pass at providing John an answer to his question. In his closing statement, our guest went over some basic advantages with a tether, the problems of the gravity gradient & the fact that the issues for colonization were very different than for experiments or a reference mission. Please post your comments/questions on TSS blog above. If you want to reach Dr. Jurist or our callers, do so through me.

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