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Paul Turner, Tuesday, 1-6-15 January 7, 2015

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Paul Turner, Tuesday, 1-6-15


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Guest:  Paul Turner.  Topics:  Paul Turner talks about his book “The Space Trade” and how to develop real estate in orbit.  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 Paul Turner to the show to discuss his new book “The Space Trade” and his concept for developing orbital real estate for profit. Visit his website for more information, http://www.thespacetrade.com.  In the first segment of our 1 hour 55 minute show, Paul introduced us to The Space Trade idea.  He first described what the mature space trade industry would look like, then he talked about how to develop a space trade.  He suggested the space trade would likely start with asteroid mining and he referenced Planetary Resources multiple times during our discussion.  He also mentioned the need for an orbital transfer vehicle and a spin ship which he described later in the discussion.  He talked about mining water and bring it back to LEO.  He recalled he had seen a suggested price for water at $50 million/ton in LEO which he said was on the Planetary Resources website at one time.  Later in the segment, this price was disputed by several listeners.  Listeners asked questions about the potential profitability of the space trade early stage since Paul thought it might not be profitable at the start.  Another early industry suggested by Paul was the servicing and refueling of satellites.  Joe then asked if a proof of concept could be applied to capturing small asteroids near Earth and bringing them back to Earth targeting their re-entry to land in Australia somewhere.  Paul said it was possible and it was important to have a proof of concept for people to see. John from Ft. Worth called to inquire about space manufacturing.  Paul had much to say about this part of his concept.

In the second segment, a listener asked about property rights and the national as well as international legal regime to make possible the space trade.  JP emailed in about manned vs. unmanned asteroid mining.  Benny asked Paul to describe a spin ship.  Later Robert inquired if lunar development might be the starting point for the space trade industry rather than asteroid mining. Listeners asked Paul many other questions including one about why establishing a space trade was important.  Paul referred us to chapter 12.1 of his book but he did mention a few of the reasons.  Later, he talked about the Carrington Event. I asked him what our TRL was for getting the space trade going and he said we could start today.  Don’t miss what he had to say about this.  In closing comments, he advocated doing something rather than just talking about it.  Pooley then called to talk about DIY space plus they discussed the old Conestoga project and JP emailed in on that as well.

Please post your comments/questions on TSS blog.  You can reach Paul Turner through me.

Dr. Anita Sengupta, Tuesday, 8-28-12 August 29, 2012

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Dr. Anita Sengupta, Tuesday, 8-28-12


Guest:  Dr. Anita Sengupta.  Topics:  Entry, Descent, & Landing for Mars, Venus, propulsion, parachute issues, & more.  You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, https://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright.  We welcomed Dr. Anita Sengupta, Senior Systems Engineer at JPL in Entry, Descent & Landing (EDL) Advanced Technologies Group to discuss EDL for Mars, other planets, and much more.  In our first segment, Dr. Sengupta described conditions relevant to Mars and landing an object on the planet. We talked about the Martian atmosphere and what an EDL team needs to consider and design to land any payload on Mars as well as humans. We also learned that EDL for a different size payload would be different than what was used for Curiosity, probably needing new systems.  We talked about supersonic parachutes & parachutes in general, addressing parachute materials, velocity, parachute violent extremes, the speed of sound & much more.  Another topic was testing on Earth to make sure the devices work on Mars.  Dr. Sengupta explained how such testing & Mars simulation is done on Earth.  Other landing techniques such as airbags were mentioned along with retro rockets.  During this discussion, our guest did a great job of explaining the various forces and physics involved in landing & how each of these forces must be dealt with for a successful landing.  We then talked about landing a payload on Venus and just how different Venus is to Mars.  The same for our Moon and the moons of Mars, Phobos & Deimos.  Listeners sent in questions about the rover debris being left on Mars as well as wondering if there were other ways to explore Mars than using rovers.  John called to inquire about first stage reusability & our guest talked about doing the “trades” (running the numbers to see if reusability is economic or not). Doug called to talk about orbital transfer vehicles, aerobraking, and more.  This led us to a discussion about larger launch vehicles, the need to dissipate lots of energy on reentry, and why larger areas with drag are preferable.

In our second segment, I asked about software programs we might use for the basic type of analysis Dr. Sengupta had been discussing. Note her recommendations.  We then talked about plasma propulsion and ion thrusters.  Dr. Sengupta had much to say on this subject including ion thruster fuel, costs, ISP, and again, the importance of doing trade studies for a mission to determine the best methodology/economics for the mission. Our guest also talked about the lower ISP Hall ion thruster which was also lower in cost but with substantially more ISP than a chemical engine.  Also in this segment, we talked about the Dawn mission & Vega, a possible Europa mission & the use of nano satellites for the Europa mission.  Doug called back regarding ion propulsion fuel, xenon, iron, lunar fuel, etc.  As our program was ending, Anita mentioned the Orion parachute system tests she works on & the new Mars mission InSight.  Several times during the program, Dr. Sengupta stressed the need to do the trade studies regarding mission planning to determine the best economics & cost effectiveness for the mission.  Many of you have heard on The Space Show that if one does not “run the numbers,” it is impossible to know if what you want to do is economically & mission productive/viable.  On Oct. 28, Dr. Jurist is doing a special webinar with his interactive Excel spreadsheet on rocket/mission planning.  It is essential to be able to do this in mission planning.  Trusting your beliefs, gut, & preferences are not the way to go so watch this webinar if you can.

Please post questions/comments on our blog.