New Mars Forums

Official discussion forum of The Mars Society and MarsNews.com

You are not logged in.

Announcement

Announcement: This forum is accepting new registrations via email. Please see Recruiting Topic for additional information. Write newmarsmember[at_symbol]gmail.com.
  1. Index
  2. » Search
  3. » Posts by BWhite

#2126 Re: Human missions » Long duration Human space missions - Can we survive them? » 2004-10-01 09:11:40

What? No it doesn't Bill, humans can manage okay in zero-G for a 5-6 month trip to Mars if humans can manage okay for a solid year in LEO. Next-gen superengines nor artifical gravity are required for humans to travel as far as Mars.

I take it you disagree with Ad Astra on this?

The key question is not whether humans can survive in periods of reduced gravity, because they can (albeit with some health problems.)  From a Mars exploration perspective, we need to determine if humans are adaptable enough to transition from going from zero-g (in space) to 0.38g on Mars.  Will the astronauts quickly get used to it?  Will they be totally incapacitated after landing on the surface of Mars?  That's why we need much more detailed and varied research into all aspects of long-duration spaceflight.

Quote from above.

Me? I just don't know and want to cover as many bases as possible.

#2127 Re: Human missions » Long duration Human space missions - Can we survive them? » 2004-10-01 09:05:48

The proof of concept of what? That the cable won't break after being pulled on that long? And putting beefier solar pannels work? Practice flight maneuvers with the vehicle you won't be using? This is provided you can even use a Progress up there already in ISS cargo configuration as the counterweight with essentially zero modifications, which is questionable, otherwise you double the price.

Its not worth the cash, $50M could about buy you a launcher for a Lunar rover payload... there are better uses for the money.

No tethered flight means we NEED warp drive for Mars.

Tethered flight means we don't.

= = =

Its circular - -we can't use tethered flight for a Mars mission because its not tested. 

But we can't test it because, why?

#2128 Re: Human missions » Long duration Human space missions - Can we survive them? » 2004-10-01 08:58:17

Bill, but they are NOT "easy and so cheap:"

Both Progress vehicles would have to have the solar pannels re-engineered, the RCS engines would have to have linkages between both vehicles to properly synchronize, and one vehicle will have to have its pressurized cargo hold replaced to accomodate the cable and docking hardware, which means you can't use it for an ISS cargo mission... so, the minimum cost for such an experiment is on the order of $50M.

Yup.

And by doing so we can also test solar panel configurations for use during tethered flight.

On a tethered flight to Mars you would probably want the place of rotation established so the solar panels lie "flat" in reference to the incoming insolation.

And the Progress can practice tethered flight manuevers - - spin up, spin down, alter the plane of rotation. Stuff like that.

$50 million for proof of concept is chump change.

= = =

P.S. - - If NASA won't do it, a private company should do it and claim proprietary rights to the data streams generated by the tests. Maybe file for patent rights on new supports designed for the solar panels.

Then sell the stuff to NASA, the same way Bigelow will sell back to NASA the TransHab stuff NASA paid to design.

:;):

#2129 Re: Human missions » Long duration Human space missions - Can we survive them? » 2004-10-01 07:43:19

If they fly to Mars in 3/8ths gee, then there is no problem, right?

Therein lies the problem.  If we design our Mars ship assuming that we need to simulate Martian gravity, we will get a heavier ship.  We will also need to test it extensively.  At this point I do not trust tethers to last for the ~180 day journey to Mars, and only rigorous testing will dispel this belief.

If we absolutely must build a heavier, artificial-g spacecraft, we should make sure that it is necessary.  That's why I advocate parallel demonstrations of humans in zero-g for long periods of time, alongside demonstrations of living organisms in a simulated-g environment.  Test both methods and may the best one be used.

Okay, instead of using a Soyuz and a Progress, park a refuse dump Progress for a few months. Tether it to another refuse dump Progress and then spin the thing uncrewed for 3 months, 6 months, 12 months, 18 months whatever.

I can't argue that we need to test tethers before using them on a Mars mission but testing tethers with leftover Progress and/or Soyuz is so easy, and cheap.

Why not?

#2130 Re: Human missions » Long duration Human space missions - Can we survive them? » 2004-09-30 22:00:22

The key question is not whether humans can survive in periods of reduced gravity, because they can (albeit with some health problems.)  From a Mars exploration perspective, we need to determine if humans are adaptable enough to transition from going from zero-g (in space) to 0.38g on Mars.  Will the astronauts quickly get used to it?  Will they be totally incapacitated after landing on the surface of Mars?  That's why we need much more detailed and varied research into all aspects of long-duration spaceflight.

If they fly to Mars in 3/8ths gee, then there is no problem, right?

Will tethers work? I don't know.

But until we try we won't know and that just gives the "warp drive" advocates more arguments why we need another 50 - 75 years and a few dozen billion in basic research.

#2131 Re: Not So Free Chat » 1st Presidential debate - who won? » 2004-09-30 21:38:40

From http://www.andrewsullivan.com/index.php … 738]Andrew Sullivan:

No president who has presided over Abu Ghraib should ever say he wants to put anyone on a leash. That's all.

#2132 Re: Not So Free Chat » 1st Presidential debate - who won? » 2004-09-30 21:12:58

Kerry flip-flops?

President: “We won’t succeed if we send mixed signals” FACT: Bush sent mixed signals through his ambivalent approach to Fallujah. Marine Commander Lt. Gen. James T. Conway said, "When you order elements of a Marine division to attack a city, you really need to...not vacillate in the middle of something like that. Once you commit, you have to stay committed." [CNN, 9/14/04]

and 

President: "You can not change positions in the war on terror if you expect to win"

BUSH WANTS OSAMA DEAD OR ALIVE... "I want justice. And there's an old poster out West, I recall, that says, 'Wanted: Dead or Alive.'" (President Bush, on Osama Bin Laden, 09/17/01)

...BUSH DOESN'T CARE ABOUT OSAMA "I don't know where he is.You know, I just don't spend that much time on him... I truly am not that concerned about him." (President Bush, Press Conference, 3/13/02)

BUSH SAYS IT IS IMPOSSIBLE TO DISTINGUISH BETWEEEN AL QAEDA AND SADDAM... "You can't distinguish between al Qaeda and Saddam when you talk about the war on terror."([President Bush, 9/25/02)

...BUSH SAYS SADDAM HAD NO ROLE IN AL QAEDA PLOT "We've had no evidence that Saddam Hussein was involved in Sept. 11." (President Bush, 9/17/03)

Kerry did better.

Now lets see what the talking heads on cable say.  :;):

#2133 Re: Human missions » Long duration Human space missions - Can we survive them? » 2004-09-30 20:24:31

That is why a free Soyuz and a free Progress is such a good idea, IMHO. Heck the incremental cost of flying such a tandem for tethered flight practice could be covered by the Discovery Channel special run about the missions.

If by "Covered by the Discovery Channel" means One Hundred Million Dollars, then yeah. It costs about $40-50M for a Soyuz and a bit less for Progress, plus modifications to the control systems, balencing vehicle weights(they have to weight about the same), and engineering involved (will the solar pannels snap off when spun up? safety cable-cutting system?) will easily make this a nine-digit project. And it will only last a few days, not months.

Use a Soyuz and a Progress that are already up at ISS.

Delay the incineration of a Progress by a few months and spin up the Soyuz for a few weeks before it completes a crew transfer mission.

No new spacecraft required.

IIRC - - at this very moment there is a Progress and a Soyuz docked at ISS. In October a new Soyuz (TMA-5) will launch and TMA-4 will come home.

In December the next Progress will launch and the current Progress will be filled with refuse and incinerated.

Time the garbage dump and the Soyuz return flight to allow a few weeks of tether practice.

= = =

Those spacecraft have already been written down to ZERO by the bean-counters. We just use them one more time before re-entry.

Agreed, its only a week or two or three first time out but its essentially free.

= = =

Start slow - - maybe 1/16th gee - - and see what happens.

Spin on a plane parallel with the surface of the Earth, so altitude cannot be gained or lost.

#2135 Re: Human missions » Long duration Human space missions - Can we survive them? » 2004-09-30 14:52:59

That is why a free Soyuz and a free Progress is such a good idea, IMHO. Heck the incremental cost of flying such a tandem for tethered flight practice could be covered by the Discovery Channel special run about the missions.

= = =

Why aren't we doing it?

Maybe some people benefit from increasing public perception that doing space is waaay hard.

#2136 Re: Human missions » Long duration Human space missions - Can we survive them? » 2004-09-30 14:28:54

Take a Soyuz and a Progress. After they have been to ISS so their accounting value is ZERO.

Tether together nose to nose.

Spin up to 3/8th gee and practice tethered flight in LEO.

Like, duh!

#2137 Re: Not So Free Chat » Anyone see Larry King Live last night? » 2004-09-30 14:24:12

Okay, are some "groups of people" necessarily evil?

*People can act evilly -in- groups (often do -- Nazism, emboldened by numbers, peer pressure).  But to answer your question:  With the exception of people forming a group for purposes of carrying out evil acts, I don't believe any group of humans brought together via random chance (such as generational tribal units) are necessarily evil.

In other words, would God condone an "us vs them" mentality?

*Supposedly God created Heaven and Hell...so yes, apparently.

Can Satan be redeemed?  is a theological variation.

*According to theologies I'm familiar with/have been exposed to, that dude is damned regardless.  There is a doctrine in evangelical Christianity called "the unpardonable sin."  Humans can commit it and once you do...you're beyond redemption, period.

--Cindy

I once read an interesting quip:

Any serious theologian who denies at least the possibility of universal salvation is a fool; any serious theologian who teaches the doctrine of universal salvation is an ass.

#2138 Re: Not So Free Chat » Iran rejects UN nuclear demands - yep - they're on the run now.... » 2004-09-30 14:13:29

It's an unreasonable gamble, since they know that Libya wasn't invaded and no noises about invading Libya are being made... look, this isn't difficult to understand: Iraq, crazy dictator, thought to be developing WMD, smashed. Libya, crazy dictator, ostentatious display of abandoning WMD, still in power. Very simple!

Basically, all this proves is that the mullahs are irrational. Which we already knew anyways, to be honest.

So why are we talking about it?

Hopefully the Iranians will back down. But are you sure they will?

If not, we need to take out those facilities.

But if we take out those facilities we also need to take out their air force and their missiles to prevent retaliation against US forces in Iraq and against Israel. General war with Iran via pre-emptive US/Israeli strikes.

Covert support of Iraqi Shia will become overt and if insurgents seize control of Basra, where do we draw our supplies from?

#2139 Re: Not So Free Chat » Iran rejects UN nuclear demands - yep - they're on the run now.... » 2004-09-30 13:58:03

My worry is what we do with the Islamicsts 30 years from now or 50 years from now if birth rates continue the direction they are heading.

One person, one vote is the American ideal.

I wonder how big an electoral vote prize China and India are...

...wait a minute, they're not US states! </sarcasm>

The fact that there is a population explosion somewhere else is no reason for fearfulness here. As far as immigrants go, you cut the numbers back to where you feel you can assimilate them; it's not like the Middle East is right over the border. No need to bring in Nazi references. They're free to screw up their own lands however badly they want, and their military strength is so pathetic that I'm unworried about them going on a spree of conquests in 30 to 50 years. By that time the US will probably be technologically advanced to the point where they might as well be fighting the Borg ("Resistance is futile. You will be assimilated. Your cultural distinctiveness will be obliterated by an endless sprawl of Wal-Marts and McDonalds...").

Ultimately, Islamic terror loses the War on Terror. The only question is how many people die in the process.

The moral legitimacy of the American system of government originates with the Declaration of Independence.

Thomas Jefferson did not opine on the rights of Englishmen, he opined on the rights of man.

The rights that are safeguarded by the United State Constitution did not originate with that document and those natural rights extend to every member of the human race. Deny that and the genuis of America is nullified.

#2140 Re: Not So Free Chat » Anyone see Larry King Live last night? » 2004-09-30 11:56:37

The Catholic priest encouraged people to drop the "we/they" business.

From the people that brought you the Crusades and the Inquisition.  :laugh:

Bah!

Several Popes have already apologized for that.

#2141 Re: Not So Free Chat » Anyone see Larry King Live last night? » 2004-09-30 11:54:35

Are some people pre-destined to be "evil" or can anyone seek forgiveness?

*Well, I presume you're predicating that as in "forgiveness by God."

As for whether some people are born (whoops...you said "predestined"...as in a church dogma?) evil, I think of Jeffrey Dahmer.  I'd like to believe he wasn't born evil.  However, even after incarceration and claiming to become a born-again Christian (including baptism), he still acknowledged strong impulses to commit more gruesome crimes.

I think some people are destructive killing machines (psycho/sociopaths) by nature.  Not sure how much control they could get over it, but I think there are a few at least in whom that nature completely possesses them and they could likely never -not- be that way.  :-\ 

--Cindy

Okay, are some "groups of people" necessarily evil?

In other words, would God condone an "us vs them" mentality?

= = =

Can Satan be redeemed?  is a theological variation.

Can God make a rock too big for him to pick up?  :;):

#2142 Re: Not So Free Chat » Apropos of Nothing -3- » 2004-09-30 11:52:01

Question: What do you get from too much Rogaine and too much Viagra?

Answer: Don King.

#2143 Re: Not So Free Chat » Iran rejects UN nuclear demands - yep - they're on the run now.... » 2004-09-30 11:50:30

Edit: We have satellites. They have car bombs and a higher birth rate.

This seems more like a stunningly concise statement of the sheer scope of the failure to modernize that Iran has had. One nation has built satellites and advanced the sciences on every front, and the other is poor, overpopulated, and its best military weapon is cobbled-together makeshifts. One has women in its army, and the other has women in the 7th century.

How very frightening. Let's take them seriously!

I agree.

My worry is what we do with the Islamicsts 30 years from now or 50 years from now if birth rates continue the direction they are heading.

One person, one vote is the American ideal.

Unless we decide that some people are sub-human (like the Nazis did) eventually we will be swamped by sheer numbers.

#2144 Re: Not So Free Chat » Iran rejects UN nuclear demands - yep - they're on the run now.... » 2004-09-30 11:46:55

But what if you believe the guy with the laser pointer is the psycho one?

Then I guess you mostly die, considering he's already got his gun trained on you.

As do a lot of people in the http://www.cdi.org/friendlyversion/prin … 2295]Green Zone.

Iran has hundreds if not thousands of missiles capable of reaching Baghdad.

#2145 Re: Not So Free Chat » Iran rejects UN nuclear demands - yep - they're on the run now.... » 2004-09-30 11:09:47

Trebuchet suggests the mullahs lay low and avoid rocking the boat. How? they are already dead-center in our targeting radar. That little laser pointer light is already lighting up Tehran.

The only way to survive once the laser light pointer is shining on you is to do whatever it takes - and I mean whatever it takes, not halfassed stuff - to convince the US that you're not really as psycho and threatening as you seem.

But what if you believe the guy with the laser pointer is the psycho one?

Like I said, its macho vs macho.

= = =

Edit: We have satellites. They have car bombs and a higher birth rate.

= = =

Edit #2: If we stopped being macho, stopped being worried about "standing tall" and chose to use a scalpel instead of a hammer we could achieve our goals with less trouble, expense and blood.

#2146 Re: Not So Free Chat » Anyone see Larry King Live last night? » 2004-09-30 11:04:56

The Catholic priest encouraged people to drop the "we/they" business.

Naturally enough. . .

The Rabbi said there IS "we and they," and said some people and groups -are- evil.  He also praised American Christianity as being the protector and nurturer of the greatest levels of human freedom the world has ever known.

Are some people pre-destined to be "evil" or can anyone seek forgiveness?

#2147 Re: Not So Free Chat » Iran rejects UN nuclear demands - yep - they're on the run now.... » 2004-09-30 08:09:20

If I were an Iranian cleric, I wouldn't be so crazy as to put my nation in such dicey situations as "annoy the superpower"...

You raise some good and obvious points, but the premise is flawed. You'd behave in that manner if you were leading Iran. None of us can make truly accurate guesses of what goes through the head of an Islamic fundamentalist mullah, not being mullahs ourselves.  ???

But a guess: Were I a cynical Iranian ruler using Islam as a front to legitamize my rule, yet still believing that Allah is great, we are righteous, America is the Great Satan and that the Israelis are out to get me... I'd want the nukes. They're a good way of keeping the Great Satan from sacking my capitol (though also a good way to make the Great Satan want to) and if those Israelis try anything... Or maybe I'll hit 'em first. It's not as though the neighbors will get upset and the Americans get squeamish around wackos with sun-bombs, can't imagine why.  roll

By the way, don't worry about those rockets. Communications satellites, yeah, that's the ticket. Peace.  big_smile

Also think about the distinction between the hammer and the scalpel.

America has a President who does not do nuance and shrugs off the obvious lack of a link between al Qaeda and Saddam.

Iran has already been named as a charter member of the Axis of Evil 

Trebuchet suggests the mullahs lay low and avoid rocking the boat. How? they are already dead-center in our targeting radar. That little laser pointer light is already lighting up Tehran.

Since Bush insists on swinging the hammer and declines the scalpel, what choice do they have?

How should we change?

Don't corner a rat until we are ready to kill it!

#2149 Re: Life support systems » Eat Like a Martian » 2004-09-29 17:54:11

Why are they using soil?

Hydroponically grown plants grow faster and with less waste.

Where does the hydroponic solution come from?

Water, found at least in some quanity on both the Moon and Mars, and numerous minerals that can probably be found in large quanities. Such as...

* * *

Whatever can't be found, can be brought along. And a lot of it can probably be recovered when the planets eventually die off, and from other... ahem... sources of waste.  :;):

Does anyone have experience making hydroponic solution from inorganic materials? What type of processing is needed?

#2150 Re: Science, Technology, and Astronomy » STOP PRESS: Scaled announce launch date » 2004-09-29 13:35:52

By George, Bill, I've think you've got it!  :laugh:  big_smile

If Branson still owned Virgin Records, put 2 tickets in a new CD release with the promise that the new pop star will fly with you.

Sell a few million new CDs; create a new pop star out of whole cloth; generate $5 or $10 million (or more) in revenue from a single flight of this new vessel.

= = =

Do the same with concert tickets. Two lucky ticket holders from a global concert tour (25 or 30 venues meaning hundreds of thousands of people) get to go suborbital with the singer.

Again, $800,000 in revenue is mere chump change.

  1. Index
  2. » Search
  3. » Posts by BWhite

Board footer

Powered by FluxBB