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Dr. John Jurist, Sunday, 4-29-12 April 30, 2012

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Dr. John Jurist, Sunday, 4-29-12


Guest:  Dr. John Jurist.  Topics:  High altitude sky diving, space vehicle crew escape, free fall from space.  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. John Jurist back to the program to discuss his latest research dealing with high altitude bail out, space vehicle crew escape, free fall from space, and more.  Dr. Jurist introduced us to the subject by talking about the history of experiments and research in the 50’s and the 60’s for high altitude bail out and the possibility of orbital speed crew escape.  He discussed many technical issues and jump/escape parameters so do listen carefully to our entire discussion.  Issues we addressed included aerodynamic stability, acceleration, deceleration, turbulence, spinning, heat dissipation, and the need to trust one’s equipment.  For example, he cited the famous Capt. Joe Kittinger jump as well as the latest effort to surpass the Kittinger jump by Red Bull and Felix Baumgartner.  Dr. Jurist discussed the differences in suborbital and orbital bailouts and we discussed the generic escape scenarios for upcoming suborbital flights.  John talked about the old Air Force Project Moose program and a listener asked about a free fall from orbital flight, perhaps from the ISS.  Dr. Jurist explained how this might happen and what would be needed for the person to deorbit, free fall, return to the atmosphere, and to survive the experience.  We also talked about the possibility of entering the atmosphere at too steep an angle and skipping off it with the potential of not ever returning.  He said this would not happen.  Don’t miss this fascinating discussion.

In our second segment, Carl asked Dr. Jurist to explain the SR-71 accident that he mentioned in the first segment. This is an amazing story.  You can read about the SR-71 incident described by Dr. Jurist at www.916-starfighter.de/SR-71_Waever.htm.  When asked for lessons learned, John said always trust your equipment and your training.  We talked about cabin pressurization in this segment and John got lots of questions comparing aircraft pressurization systems to those of a space vehicle.  This brought up the use of pressure suits, space suits, and possible shirt sleeve environments for space vehicles.  Later in this segment, John talked about spinoffs, specifically accident improvement with results showing up in the auto industry with safer cars.  Later, he was asked if he thought we were on the right track with HSF crew safety and escape issues and he said we were and that it was an evolutionary process.  Near the end of the program in response to a question, he said the most likely failures would take place in the boost phase of the flight.  Informed consent was mentioned as an issue to be aware of, then he concluded by saying that people are tough and can survive accidents and catastrophic events with the proper equipment and training.

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