jump to navigation

Open Lines, Tuesday, 2-19-13 February 20, 2013

Posted by The Space Show in Uncategorized.
Tags: , , , , , , , , , , , , , , , , , , , ,
1 comment so far

Open Lines, Tuesday, 2-19-13

http://archived.thespaceshow.com/shows/1953-BWB-2013-02-19.mp3

Guest:  Open Lines with Dr. David Livingston.  Topics: Carnival Cruise lines & informed consent, space radiation, nanosat launchers, & 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.

     We started our one hour fifty-one minute Open Lines discussion by my throwing out some suggested topics which included recent USA Today polls on human spaceflight to Mars and informed consent using the recent Carnival Cruise Line cruise from hell as a possible indicator of what may happen in the space tourism industry.  Dave, our first caller, talked about the new efforts to create NTRs and have nuclear propulsion using tungsten as the fuel base. Dave had lots to say about the tungsten as well as traditional fuels.  I next read a listener email about an NCIS Los Angeles 2011 episode about satellite sale to a foreign party and ITAR,.  Next, we talked about another listener email calling our attention the SpaceWorks Nanosatellite Market Report, and then up next was the CNN interview with Bill Nye and the CNN anchor asking Bill if global warming was causing the NEOs and events like the Russian meteorite.  Thanks to Tim for sending in the URL for the interview which you can see and hear at  www.youtube.com/watch?v=ObU7awpJctQ.

     In our second segment, Pooley called in to support my informed consent and Carnival Cruise Line comments plus he again told us why he did not think the space tourism industry would be successful.  Charles also talked about the Russian meteorite and the need for a dedicated cubesat or nanosat launcher over and above flying small sats as secondary payloads. In addition, we talked about the Google Lunar XPrize and the absence of launch contracts for the ride to the Moon.  Tim called to talk about the nanosat launch industry, we talked about the upcoming Virgin Galactic1 small satellite launchers and deep space radiation and HSF.  The dedicated small sat launcher reminded me of an Oct. 13, 2008 Jurist Space Review article proposing a university consortium for such a launch system and the condemnation he got for his proposal.  Dr. Jurist called in to talk about his proposal and the response.  You can read his 2008 Space Review article here:  www.thespacereview.com/article/1228/1.  I also asked Dr. Jurist about Tim’s radiation comments and he explained this particular radiation issue to us. He also said there was a real lack of valid data points so much of what Tim, John and I were talking about was simply an unknown or extrapolated from data pools that may be quite different from those at the lower end of exposure.  In discussing this subject, Dr. Jurist talked about American radiation standards, astronauts as radiation workers, and the European standards.  At the end of the program, Tim called to talk about the Carnival Cruise Line incident and informed consent. Tim suggested tort reform with caps but also put forth a novel behavioral theory and I told him I would absolutely go on the five day cruise from hell to earn a million dollars!

     Please post your comments/questions on The Space Show blog.  You can email any of the participants in this program through me at drspace@thespaceshow.com.

Advertisements

Dr. John Hunter, Monday, 2-18-13 February 19, 2013

Posted by The Space Show in Uncategorized.
Tags: , , , , , , , , , , , , , , , , , ,
2 comments

Dr. John Hunter, Monday, 2-18-13

http://archived.thespaceshow.com/shows/1952-BWB-2013-02-18.mp3

Guest:  Dr. John Hunter.  Topics:  Hydrogen gas gun technology and capability, microwave propulsion for delivering cargo.  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 back Dr. John Hunter for a fresh look at hydrogen gas gun propulsion technology and capability, microwave propulsion for delivering propellant and delicate cargo, cubesat launchers, and more.  During the first segment of our 85 minute program, Dr. Hunter briefly explained his departure from QuickLaunch and the viability of impulse launch with the hydrogen gas gun.  He explained how the hydrogen gas gun works which as you will hear is very simple.  Dr. Hunter say that with the gas gun, there could be very high payload fractions into the 20’s.  Our guest was asked about total costs for the hydrogen gas gun which he referred to as installed costs.  Listeners asked him to describe the physical characteristics of the gun and we talked about how many times it could be used without needing refurbishing of some kind.  Dr. Hunter also talked about the high pressures and we compared the gun to the old U.S. Navy battleship 18 inch gun from the WWII era.  A listener asked if the gun would make a good weapon.  The answer was no.  John was asked where the gun might be located and talked about Adak & Kodiak, Alaska plus other possible sites in the Lower 48.  Listeners then asked if the Alaskan heavier cold air was a factor in using the gun.  We learned that the differences between cold air and warm air were minor.

     In our second segment, Dr. Hunter introduced us to microwave propulsion launch.  He spent some time describing how microwave launch would work and even talked about using consumer quality magnetrons from microwave ovens.  In response to listener questions, he talked about demo launches and a Cal Tech student’s PhD thesis on the subject.  Later in the segment, our guest was asked about using an impulse launch system as a cubesat launcher given the rise in popularity along with growing demand for cubesats.  Our last discussion topic was the use of Kickstarter for funding emerging and startup space projects.  Dr. Hunter said it offered real possibilities and advantages for regular people to participate in space companies and projects, but he also issued a warning for people to be alert to not be taken given the lack of oversight with crowd sourcing funding projects in general.

     Please post your comments/questions on The Space Show blog.  You can contact Dr. Hunter through me at drspace@thespaceshow.com.