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 Rxke

#26 Re: Human missions » Musk's plans for Mars » 2016-06-12 10:24:57

No nuclear upper stage. (yet or ever?)

there is some talk at certain places about a 20 MT (metric tonne) nuclear powersource, but that would be for powering ISRU and life support.

#27 Re: Human missions » Musk's plans for Mars » 2016-06-12 01:13:05

Thing in the middle is MCT on top of BFR. But... At the moment there is no official news about MCT, so take everything you see with a grain of salt. This is 'fan-made' graphics, from educated guesses. The nuclear symbol is there because a lot of people think Musk will need either nuclear propulsion or power generators.
(He will *not* have these available, there is no way in hell he can get his hands on those in such a short timeframe in a legal way.)

What I read is MCT will be launced as an 'empty' second stage on top of BFR, and 'filled' by two consecutive BFR launches (mainly propellant) and initially some Dragon2 for a skeleton crew in LEO before TMI

#28 Re: Human missions » Musk's plans for Mars » 2016-06-11 09:13:38

lol

Very true!


Chances are he's working on that, though... (His sat-fleet business just came out of the woodwork again, yesterday...

#29 Re: Human missions » Musk's plans for Mars » 2016-06-11 00:32:18

>What's the problem with precision landing?

Looks like Musk has indeed shown it to be a solved problem

#30 Re: Human missions » Musk's plans for Mars » 2016-06-10 00:53:09

Why not both? Leaks have strongly suggested Musk is going to use in-orbit LEO refueling AND ISRU to get 100MT down per mission.

... But there is one big question mark about power for ISRU. Looks like he's going to have to haul either a mission solely loaded with solar equipment or he has to get his hands on a nuclear plant somehow... Or land robotic mission 2 mars years in advance before people set foot on the ground. Power requirements for ISRU are pretty huge. Geothermal would be cool, but we can dream.

#31 Re: Human missions » Musk's plans for Mars » 2016-06-09 07:33:36

I agree with Tom on all points. smile  (I never dreamt I'd ever say that wink  )
Second: starting your inital building efforts at the lowest possible altitude has the risk of eventually having your initial outpost being inundated decades later by terraforming.

#32 Re: Human missions » Musk's plans for Mars » 2016-06-08 00:16:49

SpaceNut wrote:

Equator landings are idea for solar but is there the water reserve under ground in ice along the deeper places in the mars landscape....if so then its a yes....

There is. Check out Nasa's InSight mission

I quote ___Rocket___ from r/spacex subreddit:

the current landing site of InSight is in the equatorial region, in Elysium Planitia. What's the most interesting about this area is that it contains the probably biggest known deposit of water ice in the equatorial region. Most of the water ice is in the polar regions.

....

The position of the water ice is 5°N, 150°E - while the InSight landing site is currently at 4°N, 136°E, pretty close.

The volume of water ice is huge: 800x900x0.045 km - a shallow, flat, high concentration deposit of ice ideally suited for in-situ methane and LOX production, possibly just a meter or two below the surface ash/sand.




Mars One is dead in the water. Forget them.

#33 Re: Interplanetary transportation » DSCOVR Launch » 2015-02-12 02:04:42

I thought it remarkable some people said DISCOVR isn't that costly, so if it goes wrong, no big loss. This thing waited almost 2 decades to launch... Shows how little money or interest there really is for scientific research in space.

Almost better to piggyback on navsats and comsats if you want a sci payload in orbit...

#34 Re: Human missions » Magnetic shoes/boots: How come NASA doesn't use them? » 2015-02-04 00:46:38

RobertDyck wrote:

Pens require gravity for ink to flow down the tube.

Always puzzled me, thought it worked using capillary pressure, but probably the ink is too viscous for that to work.

#35 Re: Human missions » Magnetic shoes/boots: How come NASA doesn't use them? » 2015-02-03 05:42:47

fellow pentel user, they're fantastic! (.3 masochist)

#36 Re: Human missions » Magnetic shoes/boots: How come NASA doesn't use them? » 2015-02-03 04:11:16

From experience I know the tip can easily scatter in very tiny fragments. (when you use a fine tip, that is. I prefer +very+ fine tips :-)

of course, it's all relative. I bet there are bigger contamination sources. And in zero g, a lot of debris ends up in the filers of the fans

#37 Re: Unmanned probes » Ingenuity, Scouting Mars by Helicopter » 2015-02-03 04:07:41

sincerely hope they will put it in a spherical cage, that way no way to fsck up the blades when it tilts or lands awry.

like this: http://www.gizmag.com/gimball-flying-robot/29609/

that could negotiate canyons, chaotic terrain etc.

#38 Re: Meta New Mars » Reviving an Old Tradition » 2015-02-03 00:58:18

JoshNH4H wrote:

I'm sure JBurk would be open to reviving some of those traditions

Oh, that'd be nice.

/pokes fireplace, adjusts blanket over knees:/

"Back in the days, it was a tradition, you know.... When we caught 'em trolls, we'd chuck 'em right outa the airlock, I tellya!"


"Aaaah... Those were the days, I remember all these hills were red...."

/cackles dementedly/

#39 Re: Meta New Mars » Reviving an Old Tradition » 2015-02-02 14:43:58

Impressive, wow, really I'm impressed!

But...

JoshNH4H wrote:

about 20,000 newly registered users.

did those all pass a turing test?

#40 Re: Human missions » Magnetic shoes/boots: How come NASA doesn't use them? » 2015-02-01 13:21:52

that ballpoint pen story is repeated always as an example, sadly (or happily, depends how you look at it)  it is not true.

http://www.snopes.com/business/genius/spacepen.asp

#41 Re: Meta New Mars » The great crash » 2015-01-30 08:20:30

This being a digital database: about  50%... You mean you guys recovered all the zeroes? lol

(sorry, I'll get my coat now)

#42 Re: Human missions » Magnetic shoes/boots: How come NASA doesn't use them? » 2015-01-30 01:03:46

Also, I guess in reality astronauts don't mind floating around after getting used to it. in the 50's authors thought free fall would be very impractical to work i (it is, of course) but a hand/footrail here and there when you really need torque etc is probably much better than having magnets on your feet (imagine you float and every time you come close to the walls your feet go 'clunk' and there you are again, wriggling to get loose, and when you do the reaction to the wriggling forces you applied causes you to cannonball to the other side of the module. Clunk (rinse, repeat  lol )

#43 Re: Meta New Mars » NEWLY REGISTERED USERS MUST BE APPROVED BEFORE THEY CAN POST. » 2015-01-30 00:57:10

Welcome from a lurker ;-)

Looks like the forums are quite active again, good to see. I should hop in more frequently.

#44 Re: Science, Technology, and Astronomy » I hope they keep the lid very well sealed :-) » 2014-07-05 01:18:28

SpaceNut wrote:

How do you strap a fruit fly down to feel the 1 g as when they are flying they will see none of it.....

My mind just melted trying to figure that out smile

Josh's answer made it even worse, I tried imagining flying in such an environment... Those poor flies won't know what happens to them, center or outer circumference of centrifuge will have different pseudogravity, wow, try to fly in that kind of environment....

#45 Re: Science, Technology, and Astronomy » I hope they keep the lid very well sealed :-) » 2014-07-04 07:00:31

JoshNH4H wrote:

I'd like to see a centrifuge operating at, say, 40% of a g too.  Why wasn't that included? sad

hoping that will be its extended mission, no?
i mean, it would be a pity if they didn't keep using it after the planned tests were done.

#46 Science, Technology, and Astronomy » I hope they keep the lid very well sealed :-) » 2014-07-02 23:53:20

Rxke
Replies: 11

Long duration experiment on ISS with fruitflies!

http://www.space.com/26411-fruit-flies- … video.html

-Fruit flies, all genetically identical, so that makes for solid science.

-they live generations in a very short time, so we will be able to see a lot:  inherited degeneration, adaptations etc. etc.

-The kicker: they will have a 1 g centrifuge to allow a subset of flies to live in 1 g!

#48 Re: Meta New Mars » NEWLY REGISTERED USERS MUST BE APPROVED BEFORE THEY CAN POST. » 2013-10-19 11:17:38

Wait, so you can register, and you *are* then registered even before you get a green light for posting privileges? you can then enter stuff...  Is than not a huge security risk?

That sounds like a golden opportunity for spammers... And if you get crawled, and the crawler sees spam or malware links, what's keeping Google et al from flagging NM as a security risk?

(And al the other fluxbb bb's too?)

#49 Re: Meta New Mars » NEWLY REGISTERED USERS MUST BE APPROVED BEFORE THEY CAN POST. » 2013-09-22 04:09:09

there's still quite an influx of spammy sounding usernames... They all have in common that they do not seem to post.... Biding their time? or are the spamfilters bouncing spam-posts or something?

#50 Re: Human missions » A New Wave of Settlers? » 2013-09-11 00:09:56

SpaceNut wrote:

Musk makes rockets and that makes his plan feel possible....

He makes them with a goal... Mars. Maybe that's the part that inspires people.

He's not a super talented speaker (He's a clear speaker, don't get me wrong, he's just not a "I-can-easily-whip-any-group-of-audience-into-a-cheering-crowd-speaker"), otherwise I'm sure he'd already have come with a speech akin to 'we chose to go to the Moon, not because it is easy'

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

Board footer

Powered by FluxBB