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#1751 Re: Human missions » Mars One Way Vs. ISS » 2004-11-28 09:00:18

Which is cheaper to maintain a one way mars mission or a crew on the ISS. With ion tugs and parshoots airbag landings does it really cost much more to send supplies to mars then it does to the ISS. If we can sustain a crew on the ISS there is no reason we cannot sustain a crew on mars especially since mars has raw resources which will reduce the need for resupplies.

Clearly it is much cheaper to keep supplying the same crew then constantly fairing the crew back and forth. Maybe one way is too long but what about 10 years on mars. Imagine how much of mars you can cover in 10 years just by driving. Imagine how much more research that will get done with humans to assist the robots then just with robots. I like Mars direct and I will be happy to see it but I want to see some serious long term mars missions.

Answer to your question:

No, it will not be cheaper to maintain a base on Mars than maintain the ISS. In near Earth orbit all you have involved is modules sent up from the Earth and either expendable rocket and shuttle to supply it, which is well within our technical capability to do. To build a base on Mars we will have to commit more capital goods and services to establish that base and we will have to both develop and build that infrastructure to support it. Currently we have neither one and so it will have to be developed and built. Also if we go out to Mars we will have to send more people than we have on the ISS, because they will have do more to keep the Mars base functional like hydroponics gardens and things like that. Like they need 2.5 people just to do maintain on the ISS. Now the originally we wanted 6 people on the ISS and that would mean that 3.5 people could do science on the space station while the other 2.5 people would be doing the maintaince of that station. Your going to have the same problem on Mars, but you might need 6 or 8 people doing the maintaince or more people.

There no way to sneak out of building the infrastructure or other prep work to make a Mars base cheaper than the ISS. It would be like trying to buy a new 747 Boeing air craft for the price of a brand new car. You can try if you want to, but it not likely to happen even if it were a Roy Royce price for a car that you were using.

Larry,

With locally harvested water, locally grown food, a nuclear reactor for power, and the ability to harvest and process the Mars atmosphere, once a team is sent to Mars, there is little need to spend ANYTHING additional on support.

And if ISS had been built wisely, it would now be costing very much less to support that it costs currently.

#1752 Re: Human missions » Has Dr. Zubrin Addressed Mars Direct Objections? - A few questions? » 2004-11-28 02:05:28

Well, yes, Robert, both you and I favor an interplanetary transit vehicle. As for prepositioning a large pressurized rover, that is better than no pressurized rover at all, but it does not solve a problem with Mars Direct: that the Hab might not land near an ERV and you need a vehicle to drive over to it.

As for starting with a base on the first mission: dream on. Congress won't approve that kind of funding. Besides, Mars exploration is more likely to work if it is incremental; you start with a few 18-month missions, settle on a place for a "Mars McMurdo," have some crew stay through two oppositions, begin to build up a central base, etc.

           -- RobS

As with the basic plan, rover #2 and ERV #2 stay in Mars orbit until the Mars One crew makes contact with the ERV and rover that were pre-positioned.

#1753 Re: Human missions » Has Dr. Zubrin Addressed Mars Direct Objections? - A few questions? » 2004-11-27 18:05:21

Rover mass too large?

Add a launch and pre-position a big rover.

#1754 Re: Science, Technology, and Astronomy » Moon & Helium 3 » 2004-11-27 09:45:22

The problem is that there is not yet an efficient type of reactor to process helium 3. It is currently being done mostly as a laboratory experiment. Right now at the rate which it (research) is proceeding it will take another 30 years,"

I knew it would be in there somewhere.  :laugh:

Haven't they been saying 30 more years for the past 50?

#1755 Re: Unmanned probes » Carbon and Asteroid Prospectors - Economical Production in Space » 2004-11-26 23:31:49

Great place to set down a research base. What is the relative velocity compared to Earth?

800,000 km is rather close if we can match velocities.

= = =

Sorry, should have googled first:

The asteroid 1998 KY26 was discovered by Tom Gehrels on the night of May 28, 1998 (UT) during a routine scanning session. Although appearing as a small dot on the screen like any other asteroid, this near-Earth asteroid has some interesting properties. First, it passed close enough to the Earth for radar observations to be taken. From light curve measurements, its rotation period was calculated to be 10.7 minutes - the fastest rotating asteroid known. In fact, it is the fastest known rotating body in the solar system! Also, because of its orbit, this asteroid is the most accessible to spacecraft among those asteroids with well known orbits. As of 2002 July 28, 1998 KY26 was still the most accessible (lowest DeltaV = 3.9 km/s) asteroid among those NEOs with well-determined orbits.

http://spacewatch.lpl.arizona.edu/1998k … 8ky26.html

= = =

More:

http://www.geocities.com/zlipanov/selec … ...26.html

Look at that map! Land on 1998 KY26 and hop off closer to Mars!

Cool!



Edited By BWhite on 1101533892

#1756 Re: Human missions » A "Quick & Dirty" Manned Mars Mission - How Would We Do It? » 2004-11-26 14:15:54

Caches of supplies are simpler to launch than an Earth Return Vehicle.  Mining and construction equipment is simpler to launch than an Earth Return Vehicle.  Additional housing is simpler to launch than an Earth Return Vehicle.  Almost anything is simpler to launch than an Earth Return Vehicle.  Safer, too, I'll bet.

Exactly!

If someone went one way, use a freakin' Soyuz DM to land. With a bigger parachute, of course.

big_smile

#1757 Re: Meta New Mars » Okay guys, we need new moderators... - Want a job? Post here or nominate. » 2004-11-26 12:33:45

BWhite, Scoop? Blogging software? Move NewMars to that? Could we convert the database? I don't think we can.

Rxke, she changed her mind due to personal circumstances. I may have pushed her a bit too much. We'll see what happens.

We still need more moderators, although I have taken more time for NewMars lately.

Yup. I will accept if you still need someone.

#1758 Re: Human missions » A "Quick & Dirty" Manned Mars Mission - How Would We Do It? » 2004-11-26 12:17:36

For the record, my two fictional Jesuits are not going to Mars for efficient science. Its merely an extreme flags and footprints mission with the objective of maximum publicity.

But if no tax dollars are spent, its a free world, right? And who should complain?

#1759 Re: Human missions » Interesting comments on - Russian RD-180 rocket engine » 2004-11-26 10:32:37

Don't forget the lesson of MER.

Building Spirit and Opportunity side by side meant they got two rovers for very little more than the price of one. The workers would install a part on one rover and then turn 180 degrees and install an identical part on the other.

Even hand made items are very much cheaper if made on an assembly line. Put RD-180s or RS-68s on parallel assembly lines. Workers walk between the lines and build 4 or 6 engines doing each task 4 or 6 times in rapid succession.

= = =

My brother got in big trouble at his first ever computer job.

His consulting firm was hired to assemble hardware and install software on several hundred PCs for a Fortune 500 company and this was his first assignment in the field.

He was working 3rd shift and one night started opening the PC shipping boxes and setting the computers on a nearby work bench. After he plugged one in and while it was powering up, he opened another box and began unpackingd the power cables etc. . .  before turning that one on.

Then, once a half dozen computers were running, he began installing the software. As one install program was running, he stepped over 2 feet and began another software install. Then another, and another.

A co-worker arrived and got very angry saying it was a violation of procedure to start a second software installation before the first was complete. You were supposed to either watch the screen as the program installed or go get coffee, but NOT start a 2nd installation.

:;):

Long story short, in one night he set a company record for successful assembly and install operations, with NO faults or flaws and the next morning his supervisor said to never, ever do that again. They had bid the job as needing two months and finishing in 10 days would just look bad.

= = =

IMHO, this is why building 10x as many engines would lower costs, which means finding new demand is the key.

#1760 Re: Human missions » Delta IV Heavy and Beyond » 2004-11-26 10:13:45

If the world hasn't ended from all the American, Russian, Chinese, Japanese, Chinese, Indian, Israeli, and other launches over these years, then adding a few more launches a year for a Lunar or Martian program isn't going to hurt the environment.

Anyway, as far as the "eeeevil chemicals!" bit, take a look around... Aluminum and iron oxides are a major componet of the soil, the carbon composit parts will burn up into carbon dioxide and a little soot, which leaves... Not much. The risk of environmental damage posed by a relativly small increase in rocket launches is small enough that it can simply be ignored.

If we obey the Precautionary Principle or get sucked in to "proving" we aren't doing any harm, then spaceflight will end... There is no way you can prove beyond all doubt, so the irrational, regressionist, man-hating environmentalists will never be satisfied.

I agree with this.

China burning coal to heat apartment blocks will release billions of times more nasty waste than any handful of space missions, even if we launch as many rockets as I want to launch.

:;):

#1761 Re: Human missions » Interesting comments on - Russian RD-180 rocket engine » 2004-11-26 07:32:07

http://en.rian.ru/rian/index.cfm?msg_id=5137278]Link

101 RD-180 engines for $1 billion. Thats $10 million per engine, built at the snail-like rate of 10 per year.

Are these engines more complex than gas turbine helo engines? Are the tolerances more exacting than for the engines used on commercial airliners?

In other words, if we purchased 100 RD-180s per year (or 1000) rather than 10 shouldn't the price actually fall once production lines start treating these things like commodities?

#1762 Re: Not So Free Chat » Apropos of Nothing -3- » 2004-11-25 11:38:17

First up, uncompensated tech support followed by a long drive to dinner and heated debate with liberal relatives.  roll

Dude, come to my house. I can offer you all of the above, meaning food, the opportunity for you to give some free tech support (my brother the network guy would be pleased) and heated debate with liberals. You know, the all-American package deal.

Gratis! big_smile

= = =

My sister's children are at their dad's (divorce) therefore our traditional Thanksgiving is at my mom's tomorrow (Friday). This also saves my other siblings the burden of two dinners - - one at my folks and other at their spouse's folks - - all in one day.

Today we (that means me) will cook for my parents & my wife's parents & my sister who would otherwise be alone without her kids. I am going non-traditional:

Fresh salmon (grilled on the gas Weber);
Roast beef (with horseradish and Worchester);
Mashed potatoes (from scratch, naturally);
Fresh carrots (nuked in butter);
Fresh spinach (pan sauted in olive oil, garlic and lemon);
Salad;
Fresh popovers cooked with a small drop of boiling veggie oil in a pre-heated muffin tin. Those puppies explode in the oven.

My in-laws will bring appetizers and my Mom will bring pies and CoolWhip.

Plenty of beer and wine also. . .

= = =

PS - - A few months ago I bought this steel potato ricer tool. $5 or thereabouts. Makes the very best fresh mashed potatoes. That guy living in the simulated mats Hab in Alaska says potatoes grow really well and offer efficient and plentiful nutrition for the volume of space and plant food consumed.

Potatoes on Mars? My wife would go in a heartbeat,

#1763 Re: Not So Free Chat » Political Potpourri - ...anything political goes. » 2004-11-24 16:06:13

This http://wireservice.wired.com/wired/stor … y]Pentagon report is consistent with what I have been saying about the War on Terror for years.

Sigh. . .

http://www.iht.com/articles/2004/11/24/ … ]Alternate link:

WASHINGTON A harshly critical report by a Pentagon advisory panel says the United States is failing in its efforts to explain the nation's diplomatic and military actions to the Muslim world, but it warns that no public relations plan or information operation can defend America from flawed policies.

*  *  *

The report also says: "The critical problem in American public diplomacy directed toward the Muslim world is not one of 'dissemination of information' or even one of crafting and delivering the 'right' message. Rather it is a fundamental problem of credibility. Simply, there is none - the United States today is without a working channel of communication to the world of Muslims and of Islam."

*  *  *

In stark contrast to the cold war, the United States today is not seeking to contain a threatening state empire, but rather seeking to convert a broad movement within Islamic civilization to accept the value structure of Western modernity - an agenda hidden within the official rubric of a 'War on Terrorism,"' the report states.

"Today we reflexively compare Muslim 'masses' to those oppressed under Soviet rule," the report adds. "This is a strategic mistake. "There is no yearning-to-be-liberated-by-the-U.S. groundswell among Muslim societies - except to be liberated perhaps from what they see as apostate tyrannies that the U.S. so determinedly promotes and defends."

The report alluded to President George W. Bush's address to a joint meeting of Congress after the Sept. 11 attacks, when described the motives of Al Qaeda and other terrorist groups: "They hate our freedoms, our freedom of religion, our freedom of speech, our freedom to vote and assemble and disagree with each other."

The report said, "Muslims do not 'hate our freedom,' but rather they hate our policies," adding that "when American public diplomacy talks about bringing democracy to Islamic societies, this is seen as no more than self-serving hypocrisy."

This isn't a Howard Dean talking point, this is a PENTAGON report.

#1764 Re: Planetary transportation » Running on Compressed Air? » 2004-11-24 15:40:42

In my opinion an unpressurized mars exploration vehicle is not a serious attempt at exploration.  The crew would have to wear pressure suits the entire time and I can't imagine a mission being more than 8 hours tops so how far can you go in that amount of time?

As for the weight/mass issue.  Yes mars has 1/3 the gravity but the problem is not the vehicles weight on mars but it's launch weight from the earth.  Once it gets there who cares?

One vehicle won't solve every problem. For long range travel, I believe you want internal combustion engines. LOX/methane for example.

Why? So you can rev up the engine and power your way out of tough spots like with a Terran 4x4. Start with a Hummer - - swap in a methane/LOX engine and go from there.

Hummer too small in volume? Add an articulated trailer and then enclose the entire volume adding a flexible tunnel from the trailer to the Hummer. Primary airlock is in the trailer.

#1765 Re: Planetary transportation » Running on Compressed Air? » 2004-11-24 15:31:04

The big issue with a vehicle like this is how heavy it will be. The CA car here on Earth relies on its light weight to achieve its range, but on Mars you would need several fairly heavy things that you wouldn't on Earth... for instance, the pressure vessel & thick windows, the LSS system (CO2 scrub, H20 recycling/tankage, thermal), batteries and/or a dynamic RTG, CO2 compressor, heavier tank to handle the mass of liquid CO2, bigger wheels & suspension, heavier duty tranmission, and enough bottled breathing gas for multiple cabin or airlock cycles.

It will be neither light weight or cheap.

You do not need a pressurized compartment at all while working at the base. Find a place for a few suited up astronauts to sit on top while it zooms around the landing site, with outlets for power tools with a hitch to pull a trailer.

= = =

Maybe someone can build one to bring to the Mars Society convention next August.

= = =

Among other uses? Add an attachment to clean dust and  fines off the solar panels. Drive the air powered "mule" around the base, using compressed air to clean the solar panels.

#1766 Re: Not So Free Chat » Define "freedom" - Words and their meanings matter » 2004-11-24 07:58:30

From the profound and thought-provoking, back to the political and shallow. (Sorry, MarsDog!)

Like I said, American policy in Iraq is "Mao-ist" - - follow the theory not the facts.

When the terrain doesn't correspond to the map, follow the map! Well, isn't that the very defining point of Leftism?
:;):

Bush is so very Right, he is Left.

#1767 Re: Not So Free Chat » Political Potpourri - ...anything political goes. » 2004-11-24 07:56:10

but he seems to be implying that there may be something about life which science might never be able to explain.

Indeed, something that scientists in certain fields may need to consider as a possibilty, despite the seeming "cop out" nature of it. It's possible that there is some factor in the formation of life that we have yet to identify, be it God or some mundane physical process and finding life elsewhere would seem to support this view. On the other hand, it may have started with a statistically improbable anomaly that once started took on a life of its own, so to speak. We may even find that the start of life was the most freakish fluke ever while still operating within well understood physical laws. We could be all alone in the universe without even a creator to blame it on.

The heart has reasons reason can never know.

Pascal

= = =

This variation of religion annoys me.

Tell me my mind is too small to handle the truth. Okay, I can accept that.  :;):  My mind is smaller than God's mind, who can deny that.

Tell me there are "special truths" that have been revealed to you (a mere fellow human) but I will not see those truths unless I take your word for it? I will hit you with a 2x4 (metaphoricaly speaking, of course).

tongue

In other words, how dare any 3rd person human assert to speak for God! By the way, ask a Catholic Pope whether he believes himself "saved" and the only appropriate answer is "I sure hope so."

#1768 Re: Not So Free Chat » Political Potpourri - ...anything political goes. » 2004-11-24 07:42:51

Dickbill is absolutely right about probability in my opinion. There is a  worldview called Monism that I find rather appealing, whose big name is Ernst Haeckel: "Die Welträtsel" (1899), very 19th century stuff. It deals with the basic sameness of the spiritual and material while denying neither. Given the factitude of enthropy, for life to arise, maybe there is some active, self-complicating principle at work within matter itself? Maybe the ongoing stellar generational enrichment and creation of heavy elements could be seen as an aspect of that vital principle at work? Why not?

Indeed, we don't have infinite time. Just take a look at this starsystem. It's been around for 4.68 billion years. That's a whole lot if the universe is only 13 billion years old and it's pretty fast for mere "coincidence and probability".

We are lavishly well supplied with metallicity if you compare with most starsystems around us. How come? A big factor seems to be age as translated in supernova metamorphosis of constituent elements. Not that many starsystem can have a higher or equal amount of heavy (read: complicated) elements than Sol and be considerably older (there are many exceptions of course. Alpha Centauri has both been around for longer and has slightly higher metallicity). Thus, it wouldn't surprise me at all if we are among the first generations of intelligent beings in the galaxy.

The universe is coming to life right now as a consequence of the inherent quality of being to complicate itself.
:;):

Dook, last paragraphs of your latest post were very good. You echo my thoughts and feelings when I'm out and contemplating nature. Though personally, I see no sentient "intention" in nature, neither do I suppose the existence of God.

Professor Harood Bloom, a literary critic at Yale University, has written than in his opinion (after 60 years of close reading thousands of books) the "Blessing" promised by Yahweh to the people of Israel was the promise of life, ever growing spreading into time and space without bound.

That sounds like terraforming to me.

A great name IMHO for a Roman Catholic Mars city wouold be Promito Vitae, Latin for either "Life's Promise" or the "Promise of Life"

#1769 Re: Human missions » A "Quick & Dirty" Manned Mars Mission - How Would We Do It? » 2004-11-23 22:44:26

"Assume no major new launch systems."

If by which you mean no new launch vehicles, that we would be limited to those currently in production without alteration, then the answer would definatly be "no."

Here is one scenario:

http://www.livejournal.com/users/father … remeagwali

I use Thiokol 5 segment RSRMS plus LH2/LOX upper stages for this scenario but I believe the Russian Proton would work as well. (Elden Smith is my creation, btw)

#1770 Re: Meta New Mars » Okay guys, we need new moderators... - Want a job? Post here or nominate. » 2004-11-23 22:39:13

Ahh, as far as I can tell, it's not actually a bug, just the fact that IkonBoard "Advances" members when they increase their post count. You guys were being "Advanced" back to "Member" status. smile

Pretty neat feature... although a bit evil and risky. Shouldn't be a problem now.

I'm looking for one more moderator. smile

Rxke, you are one of our most prolific posters, and I'm happy to have you part of New Mars, your english is just fine by me (you should see my spanish!). If I didn't nominate Bill, it would've been you.

Can I investigate a migration to Scoop? Obviously, that would need higher approval.

#1772 Re: Not So Free Chat » A bet - Adrian and Josh - discussion » 2004-11-23 11:35:46

Let me play the cattepillar in your buttermilk...

Let's buy into your premise. What does getting there first really mean when there are very real constraints on how quickly you can grow the population? It's going to cost a lot time and resources and energy to keep kids alive in space.

Native American's had a decisive population advantage when colonists first arrived. Fat lot of good it did them.

Jamestown failed. Yup. No guarantees. (Oops, meant Roanoke)

FINITE to fail, but infinite to venture. 
  For the one ship that struts the shore 
Many’s the gallant, overwhelmed creature 
  Nodding in navies nevermore.


Emily Dickinson? I got me some heavy artillery here.

= = =

We pays our money and makes our choice. Settle Mars and risk failure or stay home and watch Simpsons re-runs in idleness and comfort.

#1773 Re: Science, Technology, and Astronomy » Aerospace Archeology? » 2004-11-23 11:30:57

Apollo cameras collected by oil shieks as souvenirs? People are people, Cindy. We will remain what we are even after going out into space.

#1774 Re: Not So Free Chat » A bet - Adrian and Josh - discussion » 2004-11-23 11:29:06

America has the lead right now in wealth and technology. Population? India & China are educating engineers in far greater numbers than we are.

If we wait 100 years, there is another children's story:

"The Tortoise and the Hare"

#1775 Re: Not So Free Chat » A bet - Adrian and Josh - discussion » 2004-11-23 11:25:48

One problem. The heavens are "owned" by everybody.

which also means nobody. Therefore, demographics is destiny. Especially if we continue to value 1 person = 1 vote.

Whoever gets out there first and makes babies will be in the best position for their grandchildren to write the laws concerning space property rights. Writing the rules for space property rights will be the "Great Game" of the late 21st and early 22nd centuries.

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