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#26 Re: Human missions » Branson Virgin Galactic » 2007-05-10 13:23:00

Hello all

The tourism thing looks interesting, it will capture the public imagination but that's all it is - tourism, and for people with money.

Yes but cars and aircraft started out much more expensive than they are today also.

Burt/Richard = not even anything orbital!

Just like old cars and aircraft were not orbital.
It's the motivation that counts
wink

Rutan/Branson = Zero exploration

It depends on where you you set the limit to what directly supports exploration, they're developing cheaper solutions to old problems which can probably be applied elsewhere later on.

#27 Re: Not So Free Chat » Hello all » 2007-05-10 13:08:56

Just wanted to say hello to everyone. It's been a long time since I've been here, but finally I finished the last exam in the university, so hopefully I will have a little bit more time to be active here now.

#28 Re: Not So Free Chat » Katrina and New Orleans » 2005-09-04 11:17:31

Hi Yang, do you know anything about the taifun that was about to strike the Chinese coast a few days back? I hope it hasn't caused any major trouble there like Katrina.

Was just watching CNN, that FEMA official is a joke, he's telling they needed time to mobilize the national guard and get them in before they could be supplemented by active duty personel.
Did this Iraq war confuse them so much they don't know the simplest basics anymore?
You send in the regular forces first and don't wait for reservists to get assembled before you do it. And don't tell me thousands of troops appearantly aviable are not enough to keep some f*cking drug addicts with guns from raping and harassing people.
With all the air transport power they could have had them in a matter of hours, not days.

Well anyways I hope things are turning for the better finally, they should accept the water treatment machines, they are pretty new and were built exactly for this kind of situation where you need fresh water made out of filthy.

#29 Re: Not So Free Chat » Katrina and New Orleans » 2005-09-01 16:47:48

Jeez, this is getting worse by the hour, I hope Josh's relatives are safe.

It makes me sad to see all the people loosing their homes and this with a dam that would have been finished and secure a few years later.
  sad

#31 Re: Martian Politics and Economy » "Agreement" on Mars » 2005-08-30 19:29:43

Probably it will be like with settlements here on Earth. At the beginning they will be too unimportant for powers back here to bother with too much, but as they get more significant economically the grip by Earth authorities will increase on cultures that will be increasingly different from those on Earth resulting in conflict.
If the space people manage to win that there will be another time of more freedom, but in the end they will have governments that will be no different in oppressing the people than those on Earth. This will be the time when we will have to move out even further.

Oh and I might add that as religion is becoming the dominant force in the 21st century there will be enough people who will want to leave Earth to escape increasing oppression of free thought.

I know this sounds like the history of the US, but fact is it was always something similar to this with any new colonies since the antique.
But it is very difficult to make such long term prognoses now that we are beginning to be able to change ourselves fundamentally and are developing ever smarter AI all the time.

In the end I don't have the slightest idea of what it will be like.  tongue

#32 Re: Human missions » Space Advocacy Fragmentation » 2005-08-30 14:46:22

Welcome to the forum Frank,

I guess most of us have already heard about the Red Colony site of yours, which is yet another useful contribution to the space movement.
About the fragmentation I have to say that we are making progress anyway, just look at the emerging suborbital market, the nanotube people or the Mars analog stations of the MS.
This is the beauty of it, that it has already become far more than a single organization and is in the process of becoming a second way to reach orbit without the help of any government (other than just allowing it to happen).
People all around the globe are working towards the same commong goal, even though most of them don't even know about each other.
Advocacy is still a very important part of the whole, we need to get as many people involved into space related work as possible.
For lack of qualification, never let that stop you from trying out new things, you can learn anything you want if you just stay at it.
For me it was Tsiolkovsky whose biography proves this best, I mean if he could do the things he had done out of that situation most of us can do it also.

a Russian rocket scientist and pioneer of cosmonautics who spent most of his life in a log-house at the outskirts of the Russian town of Kaluga.

He was born in Izhevskoye (now in Spassky District, Ryazan Oblast), Russia in a middle-class Polish family. As a child he had caught the scarlet fever and became hard of hearing. He was not accepted at elementary schools because of his hearing problem, so was home schooled until 16.

Nearly deaf, he worked as a high school mathematics teacher until retiring in 1920.

So just keep up the good work, we are on track even though it is still a long way.

#33 Re: Human missions » Spacesuits - personal spaceship » 2005-08-30 07:56:11

The port idea could also be a simple outer layer over the actual suit (transparent plastics over the head piece), which could be an MCP type also in this case.
If this outer layer is damaged it could be just thrown away still leaving you with a working suit inside.

But I agree this is only relevant if the dust proves to be really toxic. I would still be for going down and work there even then.
Space isn't that harmless with all the radiation and micrometeorites either, after all, and it will be way cheaper to build heavy structures to protect against these down on the planet than in orbit.
And I think any dome or greenhouse can be protected from the dust well enough, even in the case of a leak the gas (and dust) would stream outward from the pressurized place offering a natural protection mechanism.

#34 Re: Human missions » Spacesuits - personal spaceship » 2005-08-29 18:57:22

What if the suit is designed in a way that the top of the suit can be fitted into some sort of docking adapter and opened wide enough that the astronauts can climb out through the top.

The suits would stay outside all the time connected to these locks like the gloves in a sandblast machine or a sterile room. They could be turned inward to clean the inside and cleaned by compressed CO2 on the outer side.

#35 Re: Not So Free Chat » Race and Culture - A Changing Europe - Opening a mighty can of worms... » 2005-08-29 12:46:05

Oh after reading through all of this arguing now I understand why it is in this thread. Some of you sound just like european powers 100 years ago.
roll

#36 Re: Human missions » Space Advocacy Fragmentation » 2005-08-26 19:49:30

About the only people that aren't are the hardcore space elevator and NASA-hater people.

??? Heavy lift would help a lot to initially set up a space elevator, maybe the will be no other way to get the first ribbon up without in orbit construction.

#37 Re: Interplanetary transportation » Magnetic Launching Points » 2005-08-25 08:34:46

A space elevator is one of the few options to reduce cost to orbit enough to make it affordable for middle class people to go into space. Only then can a real colonization effort happen on a big scale.

As for how long it will take to improve space transportation enough for this to happen, who knows that? Certainly not within the next 10 years, but even in just 20 years it is not entirely impossible if you are very optimistic.

#38 Re: Interplanetary transportation » Magnetic Launching Points » 2005-08-24 19:25:46

I wonder how an electrical cable would interact with van Allen Belt radiation and what effect it has to the molecular structure of CNT. Taking a few grams of the material and exposing it to radiation here on Earth would be an interesting project.

#39 Re: Not So Free Chat » Wm. Wallace Honored (Scotland) » 2005-08-24 09:47:03

It's just that it looks different with the white t-shirt underneath.

Wallace must have been a good fighter, I liked the movie, too, somehow reminded me of the peasant revolts in Hungary in the early 16th century that were also put down most brutally by Szapolyai, prince of Transsylvania (successor of Dracula)

So here's another useless information now.

#40 Re: Not So Free Chat » Wm. Wallace Honored (Scotland) » 2005-08-24 07:55:28

Hmm that guy looks more like a Roman senator than a Scottish rebel to me.

#41 Re: Not So Free Chat » Multi User Mars Simulation Game » 2005-08-22 19:01:33

Maybe it would be useful to cooperate with the other program's design team.
It could work like this: When you click on one of the bases in the simulation you get a close up view with the other program's graphics where you can view the base and set up construction projects like building a new greenhouse for example.

It could become difficult to connect the two programs however, since yours is in Java while the other one is written in Delphi.

#42 Re: Not So Free Chat » Race and Culture - A Changing Europe - Opening a mighty can of worms... » 2005-08-22 12:18:53

Current situation in Germany is a new Communist party has been founded and allied with the former East German Communists, together they're at 10% now in the polls.
This has changed the situation, what looked like a sky high victory for the conservative coalition before is now a very close game.
While both the traditional left and right wing parties are denying to work together with this new party it could result in a grand coalition of the two largest parties, namely the conservative Christian Democtrats and the Social Democrats.
Now some important reforms have already been done by Schroeder, but it was the refusal of his party to continue the reforms that caused him to go for early elections in the first place. I have some doubts that a grand coalition would be able to agree on coherent reforms, but we'll see.

The question about demographics came up only in recent months in Germany, the left wing answer to it was to go for more immigration to get enough people at working age into the country. But then a professor calculated we would need something like 200 million immigrants in the next half century to keep the percentage of working people high enough, so now a more family encouraging policy is now being discussed by all parties.

What I'm missing in all the election campaigns is to make technological progress an agenda. This shows most people are still not getting it, the root of the problems with the economy are the restrictive policies against technologies like genetics, nuclear power or the lack of investment in spaceflight. Some people here obviously are of the opinion that we can stay wealthy indefinitely just by producing expensive cars and this one is a big mistake.

#43 Re: Interplanetary transportation » Magnetic Launching Points » 2005-08-21 06:42:53

If you accelerate with the track at 7G you still need about 60 km of tracks to get to escape velocity. (edit: this is from LEO to escape velocity)
Such a long structure is very difficult to keep stable in orbit with all the gravitation gradient forces pushing it around.
The recoil is not so much of a problem if you use the rail as an assist for landing i. e. you launch payloads to Earth, which have previously docked at orbital speed, against the orbital path of your rail, so it slows down by 3km/sec and enters the atmosphere at suborbital velocity.

I prefer a rotating tether in orbit to this anyways because it would be way easier to build and maintain as such a long track of electromagnetic accelerators.

As for launching from the ground via magrail, those very high speeds (even way beyond Mach 4) are doable if you run the spaceship in a vacuum tube that ends at  high altitude. The track would still have to be very long if you want to reach these speeds however.

The two stage vehicles have the same basic problem as normal rockets, they have to be some 90% fuel in mass (unless you have some advanced scramjet of what I really would like to see some performance data), which limits your structural options.

#44 Re: Not So Free Chat » Multi User Mars Simulation Game » 2005-08-20 18:08:33

Hmm very interseting simulation there, too, looks quite detailed. But is there really no way to interact in the game? I mean it's useful to have the AI take over micromanagement of the colony,  but it would be interesting to try out different infrastructures and see which performs better.
Are there any resupply missions from Earth? This is another issue where one could  think of endless variations.

Anyways it must have been a tough job to make the AI completely independent on this scale, that's impressive. Congratulations for the people who developed it to this degree, always good to see others working on space related projects, keep up the good work.

edit:  Lol, the job chart reminds me of the upcoming election, was already figuring out which coalitions would get a majority.

smile

#45 Re: Human missions » Coherent Mars plan » 2005-08-20 15:11:27

That hotel thing, what about just using the ISS as a hotel from now on?
Get one or two astronauts up to do the maintenance and the rest could be tourists. There must be a market for this after all, as weird it seems to be, if there are people trying to build their own hotel. Why not use the ISS or parts of it then instead?

#46 Re: Not So Free Chat » Multi User Mars Simulation Game » 2005-08-20 14:20:53

Just found the Marsbase game the French chapter of the MS is developing.
Interesting game, definitely worth a look.
http://perso.wanadoo.fr/salotti/marsbase.htm

#47 Re: Human missions » Coherent Mars plan » 2005-08-20 14:11:34

Rxke, fragmentation?

We will need all types you mentioned at some time (Ok probably with the exception of the Dyson Sphere advocates) and many more. It is a good thing that there are so many ideas out there and people who are working on them.
What we need is to have a plan (like the VSE) that puts these ideas together in the most useful order, then focus on one idea first, then go on to the next when it is done. But everything needs to be researched at the same time with some small resources commited to the ideas that will be needed later on.

#48 Re: Human missions » Mission One: a one way ticket to Mars? » 2005-08-12 10:32:11

That would help but there will have to be ventilators if natural flow is insufficient to exchange the air between different areas. This is because you will want to get the CO2 out of the living quarters and to the green houses even with mechanical aid if a natural flow isn't enough.
Alternatively one could try to filter out the CO2 and release it into the atmosphere near the living quarters and let some stream into the greenhouses. It might be too difficult to separate the small amount of CO2 to bother with though.

Still, it is not sure that air circulation alone will also be enough to exchange the heat, too, we need a design for a specific base and look into this matter with the whole system in mind, not just a part of it.

#49 Re: Not So Free Chat » Political Potpourri VIII » 2005-08-10 19:13:48

No, clark, you're looking at the wrong place, it's all in the toilet paper, with watermarks. But it takes a lot of time, only very few papers are marked (haven't found one yet, but keep looking), obviously for safety reasons.

#50 Re: Human missions » Mission One: a one way ticket to Mars? » 2005-08-10 11:22:57

I'm just guessing but there might be mirrors that don't reflect UV light, maybe something like a prism that breaks up the light into spectral colours. We could use these exclusively to light up greenhouses rather than bothering with UV blocking windows if they can't be made any better.

A one way mission would be possible from the day any mission to Mars is doable at all. Returning the crew after a minimum of two years of being isolated from any resupply is not easier than sending a resupply capsule after this time.
But I'm realistic enough to know that the first one will be a return mission if it is done by a government space agency, which I'm not 100% sure about after seeing this fuel tank debacle, it's definately not going to happen in this style.
Anyway I wouldn't support a one way mission without the option to return at the next window and would leave it up for the crew to decide if they want to stay.
Even for a two way mission, there will have to be a couple of long duration missions to the Moon before to test out as much of te equipment as possible with a fast emergency return option.

For the waste heat don't forget that the base temperature of Mars is some 60K lower than that on Earth, so you still have a temperature difference of about 100K, and this closer to absolute zero than on Earth making it more efficient for the same difference.
Anyway this is just wild guessing without doing some basic calculations.

GCN, you're right with not using pressurized CO2 within the base, maybe it would be good to add heat exchangers and a second water loop for habitable parts of the base, if it doesn't decrease efficiency too much.

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