Quote from: OV-106 on 03/08/2011 06:22 pmThe thing they ignore is that there is more to flying in space than just the launch. I guess they got that from Cx trumping Ares I safety as the Greatest Thing Ever and ignoring the overall lunar mission LOM probability.
The thing they ignore is that there is more to flying in space than just the launch.
1. The thing they ignore is that there is more to flying in space than just the launch. The escape system (while great they will have it), side-mount comment, etc amounts to a PR-style comment and has little engineering analysis behind it. 2. They suggest it will be cheaper but they don't say how much. They ignore the requirements that have to be met are still in question and therefore so is cost and schedule. 3. They ignore what happens if NASA has to fund this entire thing because no market materializes or capital investment is slow or non-existant due to a deteriorating ISS or other factors. 4. They ignore what the recurring costs NASA will have to pay, over X number of "commercial providers", if no market materializes and if this will add up to more than shuttle.5. They ignore that we will have much less capability and much less flexibility.
Quote from: yg1968 on 03/08/2011 04:51 pmOpinion by Alan Stern and Owen Garriott:http://www.spacenews.com/commentaries/110307-commercial-human-spaceflight-safer.htmlIt reads like they are trying to convince themselves.
Opinion by Alan Stern and Owen Garriott:http://www.spacenews.com/commentaries/110307-commercial-human-spaceflight-safer.html
Quote from: OV-106 on 03/08/2011 04:55 pmQuote from: yg1968 on 03/08/2011 04:51 pmOpinion by Alan Stern and Owen Garriott:http://www.spacenews.com/commentaries/110307-commercial-human-spaceflight-safer.htmlIt reads like they are trying to convince themselves. They are seriously fooling themselves on LAS reliability. There is no realistic system that could achieve 0.99 reliability. 0.8-0.9 is far more realistic.
Quote from: OV-106 on 03/08/2011 06:22 pm1. The thing they ignore is that there is more to flying in space than just the launch. The escape system (while great they will have it), side-mount comment, etc amounts to a PR-style comment and has little engineering analysis behind it. 2. They suggest it will be cheaper but they don't say how much. They ignore the requirements that have to be met are still in question and therefore so is cost and schedule. 3. They ignore what happens if NASA has to fund this entire thing because no market materializes or capital investment is slow or non-existant due to a deteriorating ISS or other factors. 4. They ignore what the recurring costs NASA will have to pay, over X number of "commercial providers", if no market materializes and if this will add up to more than shuttle.5. They ignore that we will have much less capability and much less flexibility. 1. They were just focusing on the launch portion because that is where there more providers. 2. "We also think that commercial crew LEO transport has the potential (and, many believe, high probability) of providing crew transport at a far lower cost."3. Still would be cheaper.4. Still more flexibility and robustness. Not dependent on one system for manned access.5. That is a given in all scenarios. Name a proposed system that replaces all the capabilities of the shuttle. Orion and Ares I didn't.the shuttle program is ending, it is not part of the equation.
Mike, start with this:A. The shuttle is going away.B. Provide support the ISS. I am not debating that is was wrong to discontinue the shuttle program without phasing in the "replacement". I agree it was wrong. I am taking that as a given and moving on to "B."
Quote from: yg1968 on 03/08/2011 04:51 pmOpinion by Alan Stern and Owen Garriott:http://www.spacenews.com/commentaries/110307-commercial-human-spaceflight-safer.htmlAs a side-note, it looks like spacenews.com is launching a forum... Trying to replicate the success that Chris Bergin (& Co.) have seen here on NSF... And now back to your regularly scheduled CCDev-2 thread.
Quote from: Jim on 03/08/2011 08:14 pmMike, start with this:A. The shuttle is going away.B. Provide support the ISS. I am not debating that is was wrong to discontinue the shuttle program without phasing in the "replacement". I agree it was wrong. I am taking that as a given and moving on to "B."Jim,Lets make "C." invent the warp drive. Now tell me how we are going to do it. That is the problem I have with B.
Quote from: OV-106 on 03/08/2011 08:17 pmQuote from: Jim on 03/08/2011 08:14 pmMike, start with this:A. The shuttle is going away.B. Provide support the ISS. I am not debating that is was wrong to discontinue the shuttle program without phasing in the "replacement". I agree it was wrong. I am taking that as a given and moving on to "B."Jim,Lets make "C." invent the warp drive. Now tell me how we are going to do it. That is the problem I have with B. If "A" is a given, how do you propose to provide support to the ISS?
Quote from: Jorge on 03/08/2011 07:41 pmQuote from: OV-106 on 03/08/2011 04:55 pmQuote from: yg1968 on 03/08/2011 04:51 pmOpinion by Alan Stern and Owen Garriott:http://www.spacenews.com/commentaries/110307-commercial-human-spaceflight-safer.htmlIt reads like they are trying to convince themselves. They are seriously fooling themselves on LAS reliability. There is no realistic system that could achieve 0.99 reliability. 0.8-0.9 is far more realistic.If the new commercial vehicles achieve 133 flights with only 2 catastrophic failures, I will be amazed.
To me, though, the biggest disappointment with "Obamaspace" is that even if it does work as intended, it is strictly LEO. It's well past time to start going beyond Low Earth Orbit again...
Quote from: Gregori on 03/08/2011 06:07 pmI don't like how they are trying to imply that it will be safer and cheaper because its "commercial". I think that's kinda extremely disingenuous.The solutions that "commercial" providers are designing are cheaper and safer because they're NOT the Shuttle!!!!! They have an escape system and are not side-mounted so that makes them a lot safer.They only have to carry a small capsule into orbit and back....not an advanced 100 ton orbiter and 20 tones of payload....so they looker cheaper but its comparing apples to oranges.Not being like the Shuttle really helps. Good engineering is good engineering no matter who creates it.The thing they ignore is that there is more to flying in space than just the launch. The escape system (while great they will have it), side-mount comment, etc amounts to a PR-style comment and has little engineering analysis behind it. They suggest it will be cheaper but they don't say how much. They ignore the requirements that have to be met are still in question and therefore so is cost and schedule. They ignore what happens if NASA has to fund this entire thing because no market materializes or capital investment is slow or non-existant due to a deteriorating ISS or other factors. They ignore what the recurring costs NASA will have to pay, over X number of "commercial providers", if no market materializes and if this will add up to more than shuttle.They ignore that we will have much less capability and much less flexibility. I support commercial and the money behind it. I don't support the "fluff" that is this op-ed. They basically say, "it's going to be great, trust us and give the people we want money". There are better ways to help assure commercial space gets the proper footing it will need but the-powers-that-be are simply wanting to stick their heads in the sand and say "don't ask the hard questions, I know it will be fine".
I don't like how they are trying to imply that it will be safer and cheaper because its "commercial". I think that's kinda extremely disingenuous.The solutions that "commercial" providers are designing are cheaper and safer because they're NOT the Shuttle!!!!! They have an escape system and are not side-mounted so that makes them a lot safer.They only have to carry a small capsule into orbit and back....not an advanced 100 ton orbiter and 20 tones of payload....so they looker cheaper but its comparing apples to oranges.Not being like the Shuttle really helps. Good engineering is good engineering no matter who creates it.
The idea behind Obamaspace, is that it enables NASA to actually spend money on going beyond LEO.
The idea behind Obamaspace, is that it enables NASA to actually spend money on going beyond LEO.The alternative is to spend half the NASA budget on developing rockets, and not on going anywhere...
Quote from: OV-106 on 03/08/2011 06:22 pmQuote from: Gregori on 03/08/2011 06:07 pmI don't like how they are trying to imply that it will be safer and cheaper because its "commercial". I think that's kinda extremely disingenuous.The solutions that "commercial" providers are designing are cheaper and safer because they're NOT the Shuttle!!!!! They have an escape system and are not side-mounted so that makes them a lot safer.They only have to carry a small capsule into orbit and back....not an advanced 100 ton orbiter and 20 tones of payload....so they looker cheaper but its comparing apples to oranges.Not being like the Shuttle really helps. Good engineering is good engineering no matter who creates it.The thing they ignore is that there is more to flying in space than just the launch. The escape system (while great they will have it), side-mount comment, etc amounts to a PR-style comment and has little engineering analysis behind it. They suggest it will be cheaper but they don't say how much. They ignore the requirements that have to be met are still in question and therefore so is cost and schedule. They ignore what happens if NASA has to fund this entire thing because no market materializes or capital investment is slow or non-existant due to a deteriorating ISS or other factors. They ignore what the recurring costs NASA will have to pay, over X number of "commercial providers", if no market materializes and if this will add up to more than shuttle.They ignore that we will have much less capability and much less flexibility. I support commercial and the money behind it. I don't support the "fluff" that is this op-ed. They basically say, "it's going to be great, trust us and give the people we want money". There are better ways to help assure commercial space gets the proper footing it will need but the-powers-that-be are simply wanting to stick their heads in the sand and say "don't ask the hard questions, I know it will be fine". I think that they are trying to answer the critics that say commercial crew is unsafe. As far as costs, the fact that SpaceX and Sierra Nevada are both asking for $1 billion or less in funding their comercial crew projects speaks volume on the costs involved when you compare it to what is being spent on Orion and the HLV. Of course, you can argue that it's an apple and oranges comparaison as BEO is more expensive. But I think that the point of commercial crew is to have hardware that matches the mission and that is not overkill for the mission.
It is unsafe. Flying into space is "not safe". Trying to oversell it as the "safest thing ever" when DDT&E is not even complete, and on a generic scale, can really back-fire. What they are "asking for" does not represent the total pie. Which brings me directly back to how much are they willing to invest and for how long if there business case collapses. So again, what happens in that case and for the questions I posed above? Nobody knows. NASA ignores it. Advocates gloss over it. Without thinking about these possibilities and without a contingency plan you have yet another epic failure and a disasterous blow to the words "commercial space flight".