There's a very small market for cargo down mass. It's mostly urine samples from what I can tell.
I don't actually have a definitive answer to that so I will answer your question with a question.If the requirement was 4 seats why did all 3 providers make sure they could squeeze in 7?If anybody knows where the full requirements can be found that would be much appreciated.
Quote from: spectre9 on 05/07/2013 10:01 amI don't actually have a definitive answer to that so I will answer your question with a question.If the requirement was 4 seats why did all 3 providers make sure they could squeeze in 7?If anybody knows where the full requirements can be found that would be much appreciated.Would appreciate it too. My position was exactly like yours, assuming 7 is a NASA requirement for evacuation of the ISS with one vehicle. But when that was challenged I could only find a requirement for 4 and half a year at the ISS for lifeboat function.
3.1.2.1 The CTS shall transport 1, 2, 3, and 4 NASA crew to the ISS during a single launch.Rationale: Four NASA crew are required to be transported and returned to the ISS to meet the United States Operations Segment (USOS) demand for crew time based on full utilization of ISS to perform science and support the ISS National Laboratory Program. All docking and undocking operations are a significant impact to the completion of ISS science, resulting in the determination by the ISS Program that the most efficient crew rotations strategy is to launch and return four crewmembers on a single vehicle. Additionally, the integrated space system must be able to perform the mission with crew complements of one, two, three or four crewmembers in a single launch or landing to provide flexibility in the ISS crew rotation plan
Making space hardware work properly the first time seems to happen more often than not these days. I don't even know what the last rocket system to fail on an initial launch was. Delta III? Even in Asia things seem to have gone fairly well. When there is an issue it's been sorted quickly. No vehicles are ever ground long.
Quote from: spectre9 on 05/07/2013 10:01 amI don't actually have a definitive answer to that so I will answer your question with a question.If the requirement was 4 seats why did all 3 providers make sure they could squeeze in 7?If anybody knows where the full requirements can be found that would be much appreciated.
The companies are going beyond the min. requirements. The extra seats could be sold for tourism or the extra volume used for cargo and 7 is the ideal number of seats for an ISS lifeboat(ability to evacuate everyone should the path to soyuz be blocked… in fact theCRV was to hold 7). For a marking/public relations standpoint equaling shuttle capacity. The companies probably figure that being able to transport and hold 7 people for the short trip to the ISS a normal trip is only supposed to take no more than 48 hours and same day trips to the ISS are possible. This old thread contains some draft information about requirements.http://forum.nasaspaceflight.com/index.php?topic=23304.30The companies figure that 7 isn’t too hard a number to hold for a short time period. Apollo could squeeze 5 in for Skylab rescue. The shuttle normal crew was about 7 but it too could lift 8.
It is hugely expensive to build a man rated spacecraft to NASA standards. 800m until 2018 is a lot of money.
I could argue that the spacecraft being developed are too big and the reason for that is forced bloat to meet the requirements. 7 seats, big batteries, LAS that pulls the ever increasing mass away from a potential disaster.
Comparing to Orion isn't possible. Orion is designed to go much deeper into space without any support from a DSH because NASA isn't sure they'll ever be able to afford one.
There's a very small market for cargo down mass. It's mostly urine samples from what I can tell. SpaceX isn't making a big killing there but yes it is good that particular capability is not outsourced.
If NASA employees are against SLS but not brave enough to speak out they're cowards but that's only my opinion and I might be a troll
I used to buy this "payload later" argument. In fact quite recently I was promoting it but it's just not going to happen.
ISS isn't going to be splashed soon enough.
The SLS program can't be stretched out for 20 years, it just takes too much money to maintain the production line.
NASA will not stop HSF
it's just that the people paying the bills want NASA to build all their own hardware. It's a big clash of ideals and not one that will be sorted any time soon.Are you Australian? If you are you should be proud enough to display it on your profile. There's no need to hide. Space has no borders.
Quote from: guckyfan on 05/07/2013 09:16 amQuote from: spectre9 on 05/07/2013 08:51 amI could argue that the spacecraft being developed are too big and the reason for that is forced bloat to meet the requirements. 7 seats, big batteries, LAS that pulls the ever increasing mass away from a potential disaster.I have a question for that. Is 7 seats a requirement by NASA? One would think so because all three vehicles offer 7. But I have found only a document where 4 seats were mentioned as requirement.I don't actually have a definitive answer to that so I will answer your question with a question.If the requirement was 4 seats why did all 3 providers make sure they could squeeze in 7?If anybody knows where the full requirements can be found that would be much appreciated.
Quote from: spectre9 on 05/07/2013 08:51 amI could argue that the spacecraft being developed are too big and the reason for that is forced bloat to meet the requirements. 7 seats, big batteries, LAS that pulls the ever increasing mass away from a potential disaster.I have a question for that. Is 7 seats a requirement by NASA? One would think so because all three vehicles offer 7. But I have found only a document where 4 seats were mentioned as requirement.
If 4 is the minimum NASA's selection of 3 contractors offering 7 seats (given Orbital offered 4) just makes no sense at all. OTOH this is an SAA so if they all said they could do it at a budget that NASA felt they could get from the Legislature why not?
I guess you didn't follow the enquiries of both Shuttle disasters and what happened to people within NASA who "spoke out."
Quote from: john smith 19 on 05/07/2013 07:50 pmIf 4 is the minimum NASA's selection of 3 contractors offering 7 seats (given Orbital offered 4) just makes no sense at all. OTOH this is an SAA so if they all said they could do it at a budget that NASA felt they could get from the Legislature why not?It makes perfect sense.NASA wishes to be just one of multiple customers for a crew-to-orbit taxi service.If a seven-seat capsule is what it takes to be attractive to non-NASA customers, then cost-sharing with those other customers will out-weigh any small costs associated with flying in a larger capsule than NASA needs.In general, I think it's also true to say that a 7-person capsule carrying 4 people will offer some extra margin on the on-orbit lifetime that ECLSS can maintain, which is a nice secondary feature.cheers, Martin
The reason for 7 was that they are each describing themselves as a successor to the Shuttle for crew transport and the Shuttle transported 7 crew.
Quote from: QuantumG on 05/07/2013 09:31 pmThe reason for 7 was that they are each describing themselves as a successor to the Shuttle for crew transport and the Shuttle transported 7 crew. Remember Elon went in front of Congress and said it would cost 20Millon per seat (based on 7 SpaceX design). Files can be looked up on this site.
I don't know why Prober quoted me to deliver that well known fact.The question was: why 7? I answered.
Quote from: QuantumG on 05/08/2013 01:38 amI don't know why Prober quoted me to deliver that well known fact.The question was: why 7? I answered. something you ponder
Quote from: Prober on 05/08/2013 02:12 amQuote from: QuantumG on 05/08/2013 01:38 amI don't know why Prober quoted me to deliver that well known fact.The question was: why 7? I answered. something you ponder I guess the implication was that it makes the seat price seem less than it's likely to actually be. What it does make me ponder, though, is the seat price of the Shuttle.. $450M / 7 = $64M?
Quote from: Prober on 05/05/2013 07:23 pmQuote from: Step55 on 05/05/2013 04:28 pmApparently the AIAA is encouraging Congress to provide more funding to commercial crew. http://www.newspacewatch.com/articles/private-space-lauded-at-aiaa-meeting.html extra funds were found.....seems the WH screwed up the numbers on cuts FY 2013, and found a bunch of funds. Google for the story a couple days ago.Your google-fu may be better than mine, can you do the honors?
Quote from: Step55 on 05/05/2013 04:28 pmApparently the AIAA is encouraging Congress to provide more funding to commercial crew. http://www.newspacewatch.com/articles/private-space-lauded-at-aiaa-meeting.html extra funds were found.....seems the WH screwed up the numbers on cuts FY 2013, and found a bunch of funds. Google for the story a couple days ago.
Apparently the AIAA is encouraging Congress to provide more funding to commercial crew. http://www.newspacewatch.com/articles/private-space-lauded-at-aiaa-meeting.html
The Shuttle also launched a lot of cargo so the price wasn't only for the seats.