Quote from: yg1968 on 03/06/2014 03:07 pmIf you carry the maximum of 7 astronauts per flight, it would amount to $65M per crew member. If you replace a crew member with cargo, you have to factor in the extra cargo (about 100kg per empty seat) that you gain by doing that.Yes, but my understanding is that ISS can only support one additional crew member and that dual operations also won't be supported, except in an emergency where there's a problem with the first vehicle. This means crewed NASA missions to ISS will only carry four astronauts at a time.
If you carry the maximum of 7 astronauts per flight, it would amount to $65M per crew member. If you replace a crew member with cargo, you have to factor in the extra cargo (about 100kg per empty seat) that you gain by doing that.
Yes, I know. But if the extra 3 seats are sold to spaceflight participants, NASA would get a better price.
If NASA decides to replace the three extra seats with cargo, you would have 300 kg (3 x 100 kg) of extra cargo. Based on the CRS2 prices, 300 kg of pressurized cargo is worth about $19M to 20M. So that would reduce your price even further.
But in 2011, Gerst said that the crew transportation system (CTS) would cost about $480M per year. So I am guessing that your $920M estimate is too high.
That was three years ago. Obviously, the price has gone up since then as the true costs were realised.
Where would those three participants sleep and eat for the six months they would have to wait before coming back to Earth? As I said before, there won't be dual operations where those participants could transfer across. I'm also pretty sure that NASA will not want to look after three tourists for a couple of weeks.
- MER Opportunity will be shut down in 2015
Here is the 700 pages FY 2015 NASA Budget estimate which was released today:http://www.nasa.gov/sites/default/files/files/NASA_2015_Budget_Estimates.pdf
NASA is evaluating whether to extend CCiCap milestones through FY 2015. Competition is an important component of the commercial crew program. Competition is a key to controlling costs over the long term and NASA’s Aerospace Safety Advisory Panel has opined that competition should be maintained until safety confidence is achieved.
- Planned in-space demonstration of cryogenic propellant storage (fuel depots) is cancelled.
Even beyond the science return MER Opportunity generates tremendous goodwill for NASA. It is hard to explain but Curiosity with its science instrument suite and fabulous location at the base of Mt. Sharp has not piqued my imagination like Oppie's trek across Meridiani.I would write a letter to my Rep but I don't have one, I am not American. I support the Planetary Society in their endeavour to keep Planetary Science programs intact and I know of course there are limits for the budget. If in 2015 Oppie is functioning like it is now the rover will have value and should not be discarded.
Quote from: woods170 on 03/11/2014 05:56 pm- Planned in-space demonstration of cryogenic propellant storage (fuel depots) is cancelled.I did not even realize this was still going on. I wonder who else recalls a page in a Powerpoint of Robert Brauns ... how better propellant management was the biggest way to reduce that mass in the first place?Does anyone else ever get the feeling that sometimes NASA's plans completely ignore it's stated objectives?
Quote from: woods170 on 03/11/2014 05:56 pm- Planned in-space demonstration of cryogenic propellant storage (fuel depots) is cancelled.Sad