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On Thursday, May 15, 2014 1:54:42 PM UTC-4, David Spain wrote:
No it's not. It'd be pure fantasy, but fun to speculate if an X37B could have it's payload module modified to allow occupation by ONE suited astronaut so that it could serve as a lifeboat for a stranded astronaut. Haven't looked at the numbers. But not likely that would be done until there was a need. There isn't one today. Dave google moose, they should be stored on ISS for emergencies... allowing the safe return of one astronaut at a time ![]() |
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"bob haller" wrote in message
... On Thursday, May 15, 2014 1:54:42 PM UTC-4, David Spain wrote: No it's not. It'd be pure fantasy, but fun to speculate if an X37B could have it's payload module modified to allow occupation by ONE suited astronaut so that it could serve as a lifeboat for a stranded astronaut. Haven't looked at the numbers. But not likely that would be done until there was a need. There isn't one today. Dave google moose, they should be stored on ISS for emergencies... allowing the safe return of one astronaut at a time ![]() Yes, because all the extensive testing showed how effective they were. Oh wait, they were just a drawing. Oh and returning a single injured satellite is an effective medical procedure. -- Greg D. Moore http://greenmountainsoftware.wordpress.com/ CEO QuiCR: Quick, Crowdsourced Responses. http://www.quicr.net |
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On Monday, May 26, 2014 9:21:26 PM UTC-4, Greg (Strider) Moore wrote:
"bob haller" wrote in message ... On Thursday, May 15, 2014 1:54:42 PM UTC-4, David Spain wrote: No it's not. It'd be pure fantasy, but fun to speculate if an X37B could have it's payload module modified to allow occupation by ONE suited astronaut so that it could serve as a lifeboat for a stranded astronaut. Haven't looked at the numbers. But not likely that would be done until there was a need. There isn't one today. Dave google moose, they should be stored on ISS for emergencies... allowing the safe return of one astronaut at a time ![]() Yes, because all the extensive testing showed how effective they were. Oh wait, they were just a drawing. Oh and returning a single injured satellite is an effective medical procedure. -- Greg D. Moore http://greenmountainsoftware.wordpress.com/ CEO QuiCR: Quick, Crowdsourced Responses. http://www.quicr.net having alternatives to evacuating the entire station in a emergency could be very useful. Imagine the station at a time of a crew of 3.... A accident occurs, one astronaut is hurt.. 2 crew could return by the normal capsule, the injured crew member and one who wasnt hurt ![]() one remaining crew member can remain on ISS to maintain it, rather than have it unmanned..... Or a soyuz or other return vehicle could be damaged in a debris hit.. moose would provide alternatives, heck nasa may have had columbia imaged if they had moose onboard and could of returned all or some of the crew till a rescue shuttle could of arrived... |
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On Tuesday, May 27, 2014 7:18:18 PM UTC-4, JF Mezei wrote:
Bob has a point... Consider how Sandra Bullock and George Clooney were recently stranded in orbit. And it isn't the first time hollywood stars rich enough to go to LEO end up having problems :-) If one were to build an escape pod whose only function is to separate from ship and de-orbit ASAP and land in water/land/anywhere, how much simpler would it be from all the systems needed in a soyuz (launch, on-orbit survival, guidance, docking etc). Would the added simplicity of the escape pod make its lifetime much much longer ? Even on marine ships, they have to test their liferafts now and then or replace them. Testing a simplified escape pod that has no return to ship capability would be impossible. So, once you are stuck with the problem of the escape pod needing regular replacement, then the concept of Soyuz/Dragon becomes much more realistic since the taxi flights automatically rewnew the escape pods with fresh ones. last year, some dude jumped out of a baloon at world record altitude and reached speed of sound in free fall. How much heating of suit would have happened ? In a scenario where one would scale this daredevil event up to orbital-re-entry: How big would a de orbit engine need to be to de-orbit one adult in a suit from ISS ? Hand held ? something that fits as a backpack ? Some something way bigger that makes de-orbit from a suit totally unrealistic ? Assuming de-orbit burn can be made, could a series of parachutes that start to be deployed right after de-orbit burn be able to manage de-deleration in a way that is survivable in G forces and also slow down fast enough to make re-entry burning no longer a show stopper ? To jump out of a ballon differes from deorbiting. Ballon is backisly a static drop, deorbit MUST cut speed .... |
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JF Mezei suggested that ...
What if one had parachutes deploy right after de-orbit burn (and by partachute, I mean any device that aerodinamically offeres much resistance). ? This would mean the deceleration would begin much earlier, which may greatly reduce heat once you get into denser atmosphere, and also spread G forces over longer period. In addition to the practical problems of coming up with such a chute, you would also have to deeply understand the resulting flight profile to be sure that you didn't trade the level of peak heating to vastly longer exposure to less-than-peak heating such that the total heat exposure was far worse. I think its an integral problem rather than a differential problem. /dps -- But happiness cannot be pursued; it must ensue. One must have a reason to 'be happy.'" Viktor Frankl |
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"Jeff Findley" wrote in message
... to evacuate a station due to the medical condition of a single astronaut? In other words, how likely is this to happen based on the data we have, which goes back to Skylab and the Salyut stations in the 1970's? I'll admit I've been putting this off because I'm too lazy to go downstairs to the library, but I believe there is a grand total of ONE such case, and that was a psychological issue on I believe Salyut 7. Jeff -- Greg D. Moore http://greenmountainsoftware.wordpress.com/ CEO QuiCR: Quick, Crowdsourced Responses. http://www.quicr.net |
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