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Dr. Arlin Crotts, Monday, 2-16-15 February 17, 2015

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Dr. Arlin Crotts, Monday, 2-16-15

http://archived.thespaceshow.com/shows/2416-BWB-2015-02-16.mp3

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Guest:  Dr. Arlin Crotts.  Topics:  Lunar exploration, commerce, & human development in addition to many related topics.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, https://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 http://www.onegiantleapfoundation.org/amazon.htm.  For those listening to archives using live365.com and rating the programs, please email me as to why you assign a specific rating to the show. This will help me bring better programming to the audience.

We welcomed Dr. Arlin Crotts back to the show to discuss his new book, “The New Moon: Water, Exploration, and Future Habitation” plus lunar related science and development issues & concerns. For more information, visit Dr. Crotts website, http://user.astro.columbia.edu/~arlin/research.html.  In the first segment of our 93 minute program, I asked Dr. Crotts to summarize lunar science and development progress since his last appearance on TSS, Oct. 27, 2009 through today.  Dr. Crotts had much say in this summary, especially with lunar water, hydroxyls, minerals, LCROSS, volatiles, and more.  Don’t miss this summary. Listeners asked many questions about INSITU Resource Utilization on the Moon, polar ice, water ice, volatiles, fuel possibilities, and more.  I asked if he had detected an increase in the public’s awareness of the Moon and many of these issues plus I wanted his thoughts on the private sector commercial opportunities and plans opening up for the Moon.  The balance of this segment featured calls and listeners emails asking about the lunar poles, volatiles, craters & the Resolve Mission.

In the second segment, Dr. Crotts was asked about the Lunar Mission One Kickstarter project and their wanting to drill 100m into the Moon.  Dr. Crotts did not comment on the project but did talk about why we needed more and deeper lunar drilling exploration.  Our guest also talked about his book in detail in this segment, saying it was very detailed, well documented and supported, and that readers would learn things about the Moon not previously known or written about given his access to original lunar exploration and Apollo documents.  Other topics in this segment addressed humans to Mars or the moons of Mars, the timing of human lunar settlement which he supported but not until we know much more about the Moon to do it safely and correctly.  We talked about this approach in some detail.  Space settlement was discussed and he said it would happen sooner or later but that we needed more lunar science first before we settled the Moon.  Near the end of the segment, Dr. Crotts was asked about NASA’s ARM project.  Space mining came up and then just before the program ended, Eric inquired about Transit Lunar Phenomena (see http://user.astro.columbia.edu/~arlin/TLP).  Tim was our last caller asking about the use of RTGs.  Dr. Crotts talked about reactors on the Moon and mentioned the smaller Toshiba 4G reactor.

Please post your comments/questions on TSS blog above.  You can reach Dr. Crotts through his website or me.

Open Lines, Sunday, 1-25-15 January 26, 2015

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Open Lines, Sunday, 1-25-15

http://archived.thespaceshow.com/shows/2400-BWB-2015-01-25.mp3

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Guest:  Open Lines with Dr. David Livingston.  Topics:  We discussed a wide range of space topics from Mars colonization to radiation issues, UFO files, the SpaceX-AF litigation, the Nixon space policy and much more.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, https://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 http://www.onegiantleapfoundation.org/amazon.htm.  For those listening to archives using live365.com and rating the programs, please email me as to why you assign a specific rating to the show. This will help me bring better programming to the audience.

Welcome to our Open Lines program.  During the first segment of our two hour seven minute program, we took several calls starting with John in Florida who wanted to talk about early Mars colonization, one way Mars trips and similar topics.  He wondered about buried Martian ruins deep under the ground and I drew an analogy to archaeological digs here on Earth in finding towns and early civilizations buried on top of one another far below the surface of the Earth.  John from Ft. Worth called in to talk about the Al Worden interview in which Al did not think there was any reason for returning to the Moon. You can read the Worden interview at http://www.dw.de/apollo-15-command-module-pilot-alfred-m-worden-nasa-took-a-step-backwards/a-18211468.  I also asked John about the release of thousands of UFO documents, http://www.usatoday.com/story/tech/2015/01/19/air-force-ufo-files/21985651.  John and I then returned to discuss more about the Worden interview, his comments on the shuttle, the ISS, Saturn V and more.

In the second segment, Michael Listner called to update us on the settlement of the SpaceX Air Force litigation.  Michael summarized the mediation and the settlement details for us.  Dr. Doug from S. California called to talk about a variety of topics including radiation.  He referred to an Al Globus article regarding his view on shielding requirements. You can read Al’s article here:  http://space.alglobus.net/papers/RadiationPaper2014.pdf.  Doug also talked about a permanent base on the Moon and his Mars Return Option.  Dwayne was the next caller and he spoke of John Logsdon’s upcoming book on Apollo and the Nixon space policy.  He talked about all the budget cuts and slashes back then and how they negatively impacted the program. Dwayne also talked about the nuclear thermal rocket and the fact that it can’t go active until it out of Earth orbit.  Adrian sent in an email about radiation debris putting satellites at risk.  Here is the older NY Times article he sent me:  http://www.nytimes.com/1995/02/26/world/radioactive-debris-in-space-threatens-satellites-in-use.html.  Tim called to debunk the Mars crew living in a tuna can analogy and instead wanted to compare it to submarines.  He got some pushback on his submarine analogy.  Earlier, Jon from NJ had sent in a note about the SpaceX satellite plans & what this may mean for SpaceX.

Please post your comments/questions on TSS blog.  You can reach any of the participants through me.

Space Show Webinar with Dr. Haym Benaroya, Dr. John Jurist, Sunday, 2-17-13 February 14, 2013

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Space Show Webinar with Dr. Haym Benaroya, Dr. John Jurist, Sunday, 2-17-13

Behind The Scenes Engineering for Space Structures and Infrastructure

http://archived.thespaceshow.com/shows/1951-BWB-2013-02-17.mp3 (audio only)

http://vimeo.com/channels/thespaceshow  — Video

Guests:  Dr. Haym Benaroya, Dr. John Jurist.  Topics:  Engineering space structures, hardware, and habits for LEO, the Moon, and Mars.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, https://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.

     We welcomed our main guest Dr. Haym Benaroya and co-host Dr. John Jurist to our first Space Show webinar for 2013.  As Dr. Benaroya is a mechanical and aerospace engineering at Rutgers University and well known for lunar architecture and engineering structures, we asked Dr. Benaroya to take us behind the scenes for a look into the engineering needed to have something in LEO, on the surface of the Moon, or Mars.  Dr. Benaroya prepared a special .pdf presentation for us which is on The Space Show blog per above.  I urge you to follow along with the .pdf slides as Dr. Benaroya discusses space engineering.

     During the first half of this two hour five minute webinar, Dr. Benaroya started out by discussing some of the basic issues in space engineering including gravity.  He started with Slide 2 and talked about each item and the engineering considerations associated with it, both here on Earth and in space.  As you will hear, not only are the engineering considerations significantly different between Earth and space, but many are also different from one another depending on if the project is in LEO, on the Moon or Mars.  Make sure you follow along with him using his slides.  Listeners, Dr. Jurist, and I asked Professor Benaroya many questions about lunar based habitats, LEO habitats, shapes, pressure forces, regolith issues, heat issues, and more.  Referring to Slide 5 Dr. Benaroya talked about gravity issues and concerns.  Slide 6 was about lunar dust issues, tidal forces, seismic concerns.  We compared seismic reinforcing in San Francisco or other terrestrial earthquake zones to what would be needed on the Moon.  The subject of engineering for extreme and rapid temperature changes came up for LEO, the Moon & Mars.  Dr. Benaroya suggested many times during our discussion that we would need to use ISRU given the high cost of getting materials to space.

     In this first segment, other topics included the potential afforded lunar engineers by having a Lunar Space Elevator available and even a lunar bulldozer!  The subject of heavy lift came up as it always does on these programs and all of us talked about fewer larger launches as compared to many smaller launches, even using depots. Doug called in to argue for the Falcon Heavy.  As Dr. Jurist pointed out, putting mass on the Moon is about 10% give or take of the rockets IMLEO mass capability.  In responding to Doug, both Dr. Jurist & Dr. Benaroya illustrated the difference between the Falcon Heavy and SLS regarding landing a specific mass on the Moon.  Just before the segment ended, in responding to a question from Dr. Jurist, Professor Benaroya suggested that each person on the Moon would need about 20 times his or her weight in mass on the lunar surface for around a six month stay.  To determine the most cost effective way to get the needed infrastructure and mass safely to the lunar surface, lots of issues go into the trade studies to determine the best approach, including launch vehicle choice.

     In the second segment of our webinar, we took a call from John in Florida who wanted to ask Dr. Benaroya about his earlier comment about using magnesium on the Moon as a type of rebar in lunar concrete.  We next talked about reliability, power sources, competing technologies and design issues.  One of the issues brought up was the need to design the structure to be successful during the design phase, not just the completion stage. This was a most interesting discussion, don’t miss it.  One of the points he made was that we can’t test structures in space like we can on Earth so engineering design issues must be considered & dealt with for space that would not be encountered on Earth.  He talked about the preferred shape for a lunar structure and advocated the arch as in Slide 21.  Our professor then talked about design standards here on Earth, the fact that we have none for space so all of the Earth standards are extrapolated to work in space though we have no history for doing this. Also, he talked about using four to five times for a safety factor where on Earth the safety factor might be more like 1.5 or 1.6.  We also talked about confidence intervals. While on Earth, something may be done with a CI of 95% or higher, he suggested that on the Moon or in space the CI would more likely be pretty low, around 70 or maybe 80%!  He cited dust design as an example of what he was talking about as dust is not a big factor in terrestrial engineering but it will be on the Moon or Mars.  Doug called again to advocate inflatable structures rather than the engineering and building of structures.  Prof. Benaroya suggested that they may be used early on but that most of the studies show their primary advantage to be in transportation because on the surface they have to be made rigid.  This is another discussion you don’t want to miss.  Near the end of our webinar, advanced manufacturing for the future was discussed.  Dr. Benaroya talked about advances in robots, layered manufacturing and 3D printing. He explained how these can really change the game for space structures, engineering, manufacturing, and costs.  Near the end, questions came in as to why the Moon instead of Mars, the 7-8 year time lines mentioned by the lunar companies and Mars One as well as wanting to know if space engineering was strictly an academic project or if it was being worked real time by companies that can actually make hardware.  As you will hear, it’s a combination of both at this time.  Dr. Benaroya kept talking about time lines 2-3 decades long and I asked him about speeding that up and the short time lines for the lunar and Mars One group.  He did not think the shorter time lines were feasible.  See what you think after you hear his and Dr. Jurist’s comments on emerging company time lines.  Dr.  Benaroya concluded by pointing out the popularity of these subjects in both undergraduate and graduate classes and the importance of student research and its benefits.

     Please post your comments/questions on The Space Show blog above.  To email Dr. Jurist, do so through me at drspace@thespaceshow.com.  You can contact Dr. Benaroya at benaroya@rci.rutgers.edu.

Here is Professor Benaroya’s webinar presentation material:

Space Show Prof. Benaroya Webinar Lunar Structures Engineering 2-17-13

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