![]() |
|
|
Thread Tools | Display Modes |
#41
|
|||
|
|||
![]()
In article ,
Dick Morris wrote: No firm cost estimates have been developed, but informal discussions have put the cost of a Mars expedition at nearly $1 trillion, depending on how ambitious the project was. The cost of a moon colony, again, would depend on what NASA wants to do on the lunar surface. EDITOR'S NOTE - AP Science Writer Paul Recer has covered the U.S. space program since 1964. " I wonder if this guy has looked at any of the plans made since 1970.. I don't know, but he obviously hasn't looked at anything proposed since 1990. If there is anything behind that $1 trillion cost estimate, the proposal will be as dead as SEI within a week. There IS NO proposal for a Mars expedition. The rumored proposal is to focus on a permanent lunar presence. This can be explained to Mars fanatics as a precursor to an eventual Mars mission, if it makes them feel better. But the real point is to start developing our closest offworld resource base, and this is as it should be. ,------------------------------------------------------------------. | Joseph J. Strout Check out the Mac Web Directory: | | http://www.macwebdir.com | `------------------------------------------------------------------' |
#42
|
|||
|
|||
![]() Joe Strout wrote: In article , Dick Morris wrote: No firm cost estimates have been developed, but informal discussions have put the cost of a Mars expedition at nearly $1 trillion, depending on how ambitious the project was. The cost of a moon colony, again, would depend on what NASA wants to do on the lunar surface. EDITOR'S NOTE - AP Science Writer Paul Recer has covered the U.S. space program since 1964. " I wonder if this guy has looked at any of the plans made since 1970.. I don't know, but he obviously hasn't looked at anything proposed since 1990. If there is anything behind that $1 trillion cost estimate, the proposal will be as dead as SEI within a week. There IS NO proposal for a Mars expedition. The rumored proposal is to focus on a permanent lunar presence. This can be explained to Mars fanatics as a precursor to an eventual Mars mission, if it makes them feel better. But the real point is to start developing our closest offworld resource base, and this is as it should be. If there is anything at all to that $1 trillion figure it won't matter. It'll be laughed to death before Bush utters a word. ,------------------------------------------------------------------. | Joseph J. Strout Check out the Mac Web Directory: | | http://www.macwebdir.com | `------------------------------------------------------------------' |
#43
|
|||
|
|||
![]()
Henry Vanderbilt wrote:
teaspoon. The only NASA option with a reasonable chance of success is to start new organizations elsewhere and slap the NASA logo on their buildings, while winding down and pensioning off the existing NASA manned space bureaucracies. The danger in that is that the new organisations will be without any experience and will make the same mistakes NASA has done. |
#44
|
|||
|
|||
![]()
Dosco Jones wrote:
Where else would you perform long term experience exercises in a low gravity, low pressure environment? A week long trip to the moon is no comparison to a year long trip to Mars. So far, the ISS and Mir have provided NASA with far more experience in building a ship to Mars than all the Apollo missiosn combined. Consider ECLSS. Dealing with humidity and water is extremely different in 0g compared to gravity. Look at all the maintenance needed to the Elektron oxygen generator, look at the reliability of the CDRA. While TVIS seems to have been extremely poorly designed right from the start and has consumed a lot of maintenance hours since then, other exercise equipment has also failed, albeit at a reasonable rate. Look at the CMGs. Until they return the totally failed on to earth for a post mortem, they won't know if the remaining 3 will have the same defect or if they are OK. The ISS is providing NASA (and the Russians) extremely valuable data on hardware reliability, number of spare parts that would be needed for a year long mission, exercise, entertainment and other items necessary to not only keep a body alive, but keep it healty both physically and mentally. On a mars ship, sending the ship to mars for an orbit isn't the way to test it. Making it orbit the earth for one year without any resupply is the way to test it. If things fail, you don't risk the lifes of the crew since they could come back down to earth. During that year, you may want to make a few escapades to moon orbit and then back to earth orbit to test engines and orbiting software. The real question will be the type of structure required. Would an ISS style ship be able to widstand sufficient acceleration from engines, or would they need to build a structurally much stronger ship ? (perhaps a strong "spine" onto which are attached ISS style modules for living space as well as storage ? NASA should be given a mandate to put a man on the moon and bring him/her back safely. NASA should then decide what is the best way to accomplish this. One metric that is important is how many trips to Mars are expected. This would dicatate a lot of the parameters for such a large ship, whether they expect to re-use it, or whether they would allow aerobraking to cripple the ship, requiring totally new one to be built for each mission. And to me, the first sign that the government would be serious would be to allow NASA to continue development of Transhab. The way the article was worded, the government seemed to want to get rid of the station and move on to something totally different. The thing is that a ship capable of supporting a crew for over a year is going to be far more like the ISS than Apolllo. As a result, the ISS is the perfect testbed for any technologies that will be used to send a man to Mars and the ISS should therefore be an integral part of the project. Someone mentioned the use of commodity computers. Hard disk drives have already had "spectacular" failures on the ISS and have been replaced with solid state ones. And I am not sure if there is any data on survival of magnetic tapes in space. And the ISS is in rather benign conditions in LEO. How much worse will it be once totally outside of the earth's magnetic field ? They're only starting to learn now if they can solder stuff in 0g. This is the type of experiments they need to prioritize on ISS isntead of watching crystals grow. And the USA needs to complete and test its versions of oxygen generators, as well as the Sabatier device to "close the loop". The USA may think it has a reliable version of an Elektron, but until it is in the ISS running 7/24, we can't say if it will be reliable or not. NASA needs to develop and test all technologies on the ISS before it can start to design the real ship to Mars. Pointless to build that ship if you're going to have to continually fix it until it works and has been debugged. That is what the ISS is for. |
#45
|
|||
|
|||
![]()
John Doe wrote:
Henry Vanderbilt wrote: teaspoon. The only NASA option with a reasonable chance of success is to start new organizations elsewhere and slap the NASA logo on their buildings, while winding down and pensioning off the existing NASA manned space bureaucracies. The danger in that is that the new organisations will be without any experience and will make the same mistakes NASA has done. Just bear in mind that NASA wasn't NASA back in the 1960's. There was no core of skilled space techs and engineers. The basic *tech* skills are far beyond what they were in the 1960's. The *managerial* skills are much degraded. |
#46
|
|||
|
|||
![]()
On Fri, 9 Jan 2004 09:48:25 -0000, "Brian Gaff"
wrote: Hmm, it ain't gonna happen I suspect when Bushykins is hopefully going to be booted out of the Whitehouse soon. But that is just a personal observation. If the Democrat competition is Howard Dean, which I think likely, Bush will win re-election by a very wide margin. Brian |
#47
|
|||
|
|||
![]()
On Fri, 09 Jan 2004 11:11:13 -0700, Charles Buckley
wrote: EDITOR'S NOTE - AP Science Writer Paul Recer has covered the U.S. space program since 1964. " I wonder if this guy has looked at any of the plans made since 1970.. He didn't look at Apollo either. Elsewhere in his story, he claims Apollo used nuclear *reactors* on the moon, and he repeats the long-disproven legend that the Apollo and Saturn plans have been lost. Brian |
#48
|
|||
|
|||
![]()
On Fri, 09 Jan 2004 12:36:13 +0100, Fafnir
wrote: What exactly would be the point of this? Anyone? Ego? Distraction from the Iraq mess? The moon landing is proposed for 2013, so it won't be the "Iraq mess", but it might be the "Syria mess" or the "Iran mess", or the "Saudi Arabia mess" by then, and it will be some other President. Anybody remember that Richard Nixon ordered two US aircraft carriers to steam halfway around the world so that the carrier that picked up the Apollo 11 astronauts would NOT be the John F. Kennedy? Apollo lunar missions returned to splashdown in the Pacific. The USS Kennedy was a warship of the Atlantic Fleet. Shifting a Carrier Battle Group from one fleet to the other would have been an enormously complex and costly operation. Even a Democratic President would have scrapped that plan. Remember, there was a war on. And that he then cancelled the last (3?) moon landings, which had already been paid for? They hadn't been paid for. Launchers and spacecraft were available, but mission ops and training had to come out of current budgets, which were very tight. Brian |
#49
|
|||
|
|||
![]()
On Fri, 9 Jan 2004 09:22:55 +0100, "Dr. O" dr.o@xxxxx wrote:
A 'true' Mars mission would last up to three years and would therefore create its own host of problems (logistics). A manned fly-by would already take more than a year and would be doable within a decade (my guess is that it WILL be done within a decade). The Project Prometheus nuclear powered engine seems to have a key role in the Bush deep space proposals. If we get nuclear engines, the time scales drop radically. Brian |
#50
|
|||
|
|||
![]()
On Fri, 09 Jan 2004 18:21:44 +1100, Brett O'Callaghan
wrote: What exactly would be the point of this? Anyone? I found this a little odd also. If you want long duration experience, do you really have to go to Mars orbit to get it? Where would you go instead? Brian |
Thread Tools | |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Why We Shouldn't Go To Mars | Jon Berndt | Space Shuttle | 11 | February 18th 04 03:07 AM |
NEWS: The allure of an outpost on the Moon | Kent Betts | Space Shuttle | 2 | January 15th 04 12:56 AM |
We choose to go to the Moon? | Brian Gaff | Space Shuttle | 49 | December 10th 03 10:14 AM |