The Russians are costing something like 400M per year. Add some inflation for the 2017 to 2020, and that's probably about 450M per year.
...this sets the cost for crew transport for the US segment at < $378M per year with up to 6 crew active on ISS...
Quote from: BrightLight on 08/08/2012 01:16 amI argue that it is the improved ISS utilization that leverages the extra expense of commercial crew to make it worth while.Isn't it a requirement that the crew vehicles provide on-orbit life support for the crews brought up?
I argue that it is the improved ISS utilization that leverages the extra expense of commercial crew to make it worth while.
the only limit to how many crew can be on the ISS at one time is just the number of available docking ports?
I think I asked some of these questions before.. or someone else did, but I don't remember the answer.. or it wasn't completely answered, so I'll ask again:Isn't it a requirement that the crew vehicles provide on-orbit life support for the crews brought up? If so, for how long?
Quote from: BrightLight on 08/08/2012 01:16 amI argue that it is the improved ISS utilization that leverages the extra expense of commercial crew to make it worth while.I think I asked some of these questions before.. or someone else did, but I don't remember the answer.. or it wasn't completely answered, so I'll ask again:Isn't it a requirement that the crew vehicles provide on-orbit life support for the crews brought up? Edit: to answer my own question.. only something like 86 hours.
Isn't it a requirement that the crew vehicles provide on-orbit life support for the crews brought up?
No. NASA provides on-orbit lifesupport unless it is a tourist...
3.1.1.6 The CTS shall provide habitable consumables such as food, water, clothing, oxygen, nitrogen, CO2 removal, personal hygiene, and other required consumables for non NASA crew during the docked portion of the mission when the non-NASA crew are on the ISS. Rationale: For any mission model that requires additional crew beyond the four NASA crew required for the ISS increment, the CTS will be responsible for carrying the required logistics in the spacecraft to support the additional crewmembers during docked timeframe. NASA will not have the ability to pre-position supplies on ISS via another cargo launch vehicle due to the required ISS logistics support via CRS, Progress, and ATV/HTV vehicles. Thus the CTS will be responsible for providing food, water, clothing, and other logistics for non NASA crew.
Quote from: QuantumG on 08/08/2012 01:21 amIsn't it a requirement that the crew vehicles provide on-orbit life support for the crews brought up?Discussed back in the CCiDC days; more recently this post. However...Quote from: pathfinder_01 on 08/08/2012 01:35 amNo. NASA provides on-orbit lifesupport unless it is a tourist... Not just "tourist". The definition of "tourist" or "non-NASA crew" appears to apply to anyone "beyond the four NASA crew required for the ISS increment"...Quote from: NASA CCT-REQ-1130 DRAFT 3.0 April 29, 20113.1.1.6 The CTS shall provide habitable consumables such as food, water, clothing, oxygen, nitrogen, CO2 removal, personal hygiene, and other required consumables for non NASA crew during the docked portion of the mission when the non-NASA crew are on the ISS. Rationale: For any mission model that requires additional crew beyond the four NASA crew required for the ISS increment, the CTS will be responsible for carrying the required logistics in the spacecraft to support the additional crewmembers during docked timeframe. NASA will not have the ability to pre-position supplies on ISS via another cargo launch vehicle due to the required ISS logistics support via CRS, Progress, and ATV/HTV vehicles. Thus the CTS will be responsible for providing food, water, clothing, and other logistics for non NASA crew.
Quote from: BrightLight on 08/07/2012 09:23 pmQuote from: yg1968 on 08/07/2012 09:09 pmI think that when commercial crew companies say that they can beat Russians price, they assume that NASA will take all 7 seats. is that 7 seats per launch or 7 seats per year, leaving the rest for cargo?I meant 7 seats per launch. But NASA hasn't yet decided if they want more than four astronauts per flight. For the time being, they say that they only need four.
Quote from: yg1968 on 08/07/2012 09:09 pmI think that when commercial crew companies say that they can beat Russians price, they assume that NASA will take all 7 seats. is that 7 seats per launch or 7 seats per year, leaving the rest for cargo?
I think that when commercial crew companies say that they can beat Russians price, they assume that NASA will take all 7 seats.
All assume a six or seven seats configuration. What NASA would do is put cargo in those places, if the seats are not taken. Besides, the USOS can support four permanent crews. And they can accept some extra crews for a couple of weeks. So with just two launcher per year, they could use almost all the seats.First launch is with four crew (expedition 1). Second launch is with seven crew, four for the expedition 2 and three temporal. Then the expedition 1 plus the temps go down on the old craft (this would require seat swappable seats). But you'd lose the overlapping of crews on expeditions. They could, instead, take two permanents and four or five temporals. You could put send the temporals to do EVA, to install a new experiment, to set up some new equipment and, why not some publicity stunt, like sending some hero firefighter from NY, or something like that.For seats to be cheaper you'd need to actually use them creatively. It shouldn't be a problem, since the current limitation on ISS appears to be manpower.
Note, lets be clear. NASA requires up to 4. There will not be more than 4 NASA crew on a flight - it would add too much cost and not buy you anything (note that the additional will have to be expeidtion and it would cost $$$ to add more life support than for 6). People need to stop dreaming of more than 4 (unless 4 + tourist).
Quote from: yg1968 on 08/08/2012 12:07 amQuote from: edkyle99 on 08/08/2012 12:00 amAll NASA has to do is look at EELV for an example of what happens when two "winners" are chosen instead of the planned single winner. Costs skyrocket. - Ed KyleCosts haven't skyrocket for COTS and there is 2 commercial cargo providers. Besides, ULA is only one company and costs still increased. So I am not sure you example makes sense. It is too soon to say how commercial cargo costs are really going to work out. Only one of the two providers has actually flown, and only by using an interim launcher and spacecraft. Both are behind schedule, which has to mean higher costs. Someone is going to have to eat those costs, eventually. EELV was all happy cheap talk too at this stage, when the rockets were just entering service. Costs have since tripled, or thereabouts. It doesn't matter that ULA is just one company. It is still supporting the costs of two production lines, two launch services, etc.Wait and see. My prediction? Take the per-seat cost of Soyuz, now the stated goal, and triple it. For starters. - Ed Kyle
Quote from: edkyle99 on 08/08/2012 12:00 amAll NASA has to do is look at EELV for an example of what happens when two "winners" are chosen instead of the planned single winner. Costs skyrocket. - Ed KyleCosts haven't skyrocket for COTS and there is 2 commercial cargo providers. Besides, ULA is only one company and costs still increased. So I am not sure you example makes sense.
All NASA has to do is look at EELV for an example of what happens when two "winners" are chosen instead of the planned single winner. Costs skyrocket. - Ed Kyle
My tea leaves say that a year from now Commercial Crew is not going to be meeting the milestones and much more funding will be requested.It will become more apparent that Commercial Crew will be pushing toward 2018-2021 timeframe.
Quote from: baldusi on 08/07/2012 10:22 pmThe Russians are costing something like 400M per year. Add some inflation for the 2017 to 2020, and that's probably about 450M per year.Close enough; see chart below.Quote from: BrightLight on 08/07/2012 10:05 pm...this sets the cost for crew transport for the US segment at < $378M per year with up to 6 crew active on ISS...I don't see how that obtains, and seems overly optimistic. To "beat" a Souyz $/seat price of ~$65M/seat (2016-2017) with seven seats occupied sets an upper bound of ~$450M/flight or ~$900M/yr. If Ed Mango's estimate is right, it's $80M/seat, presumably with four seats/flight.edit: correct figure titel
I still contend that the purpose of commercial crew is to improve the utilization of the ISS. It also gets NASA out of the taxi business and into exploration.
Quote from: BrightLight on 08/08/2012 02:51 amI still contend that the purpose of commercial crew is to improve the utilization of the ISS. It also gets NASA out of the taxi business and into exploration.Agree. I also believe that at least in the context of ISS, looking at this as a competition between CTS and Soyuz $/seat, or purely on a $/seat basis, is an extremely limited view. An alternative metric is $/hr of usable crew time (time available for supporting research)...A. Given:1. ISS fixed cost of $3B/yr.2. USOS crew of 3 provides ~35hrs of usable hrs/wk (per GAO).3. Soyuz price $60M/seat (2015 pricing, per GAO).4. Crew consumables 4.7kg/day/person (per NASA).5. Crew cargo transportation $60K/kg (CRS pricing).6. THEN ISS usable crew time cost is ~$1.8M/hrB. Assuming:1. An additional crew member for a total of 4.2. Additional crew member adds 25% usable crew time(~44hrs total, conservative).3. CTS price $80M/seat (+25% vs. Soyuz A.3).4. THEN ISS usable crew time cost is ~$1.5M/hr (-16%).In short, in the context of ISS, $/seat for crew transportation is pretty much in the noise when compared to $/hr of usable crew time.
That's the way to show a point - well done, my hats off to you. I don't know if these numbers will hold but this is a rational baseline to understand the business side of the commercial crew argument.
There seems to be a lot of people assuming Soyuz won't compete. They don't charge what it takes to launch customers. They charge what the market bears. It doesn't cost $120 million to launch a Soyuz. They could cut their prices in half and still make a profit. And, I would count on anything from the GAO as "given"