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Space Forum / Shuttle / June 2008Orion G-force question
What are the launch and re-entry G-forces for Orion? Surely, a capsule will be worse than the shuttle. If they have to use a recumbant seat for ISS crews returning on the shuttle, will that be sufficient for Orion? What about longer-term crews; how will they fair returning on Orion? > What are the launch and re-entry G-forces for Orion? Surely, a capsule will > be worse than the shuttle. If they have to use a recumbant seat for ISS > crews returning on the shuttle, will that be sufficient for Orion? What > about longer-term crews; how will they fair returning on Orion? No issue here The Orion "couches" are recumbent by definition No different than the Soyuz that have been used for long term station residents before the shuttle existed and since Well cannot be worse than Soyuz of late and nobody has died from the g forces yet! Brian  SignatureBrian Gaff - briang1@blueyonder.co.uk Note:- In order to reduce spam, any email without 'Brian Gaff' in the display name may be lost. Blind user, so no pictures please! > What are the launch and re-entry G-forces for Orion? Surely, a capsule > will be worse than the shuttle. If they have to use a recumbant seat for > ISS crews returning on the shuttle, will that be sufficient for Orion? > What about longer-term crews; how will they fair returning on Orion? > Well cannot be worse than Soyuz of late and nobody has died from the g > forces yet! [quoted text clipped - 10 lines] > > ISS crews returning on the shuttle, will that be sufficient for Orion? > > What about longer-term crews; how will they fair returning on Orion? I think that more than g-force is important that is possible to abort the launch at any time. The soyuz design forgive an incredible range of possible problems. Simple and stupid, but very robust. They can go out of route of undred of kilometers and still survive. Or they can survive an incredible mess like this: http://www.astronautix.com/flights/soyuz181.htm If it was the shuttle they could have die a dozen of times. The soviets didn't divulgate what they considered an unsuccesful launch. But as for me this is the the most succesful example of how a good design for manned space flight has to be. Simple, robust and having a low energy abort mode at almost any time of the flight, even if you do many mistakes. >I think that more than g-force is important that is possible to abort >the launch at any time. The soyuz design forgive an incredible range >of possible problems. Simple and stupid, but very robust. And yet it has suffered the same number of fatal accidents as the Space Shuttle. Brian On 17 Giu, 00:33, Brian Thorn <bthor...@suddenlink.net> wrote: > >I think that more than g-force is important that is possible to abort > >the launch at any time. The soyuz design forgive an incredible range [quoted text clipped - 4 lines] > > Brian Sorry, my english is bad. I've not data... I know about soyuz 11 accident in 1971 but recently (say,the last 30 years) I don't remember fatal Soyuz missions. A complicated thing like STS contains so many points of failure that it requires an incredible good work to operate it. It contains many parts, and the failure of just one of them could be fatal. So failure rate of any single piece and tollerances have to be extremely good. Probability is on the side of "simple" veichles. I expect that Orion will be more Soyuz (but also Apollo) like in the sense that it will be much more simple and robust. And it will forgive a lot of mistakes. Russians made incredible mistakes during some missions, but despite this they very often saved the crew. A capsule is intrinsecaly more safe. I linked Soyuz 18-1 as an extreme example, but also Apollo 13 is a story of fantastic robustness. A manned launch has to do just one thing: take humans to space and back in the more simple and safe way. Never mind it's not "sexy". Cargo and other stuff could be launched in separated launch, as they are more expendable. The topic is about g-forces. When Soyuz does a ballistic reentry it can reach 10 g. I simply expect that Orion could withstand even more weird reentries than this. Human body can resist a lot of g. Hopefully it will never be required, but in case better sick than disintegrated. This time is better to do it more robust with less frills. |
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