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#26 Re: Meta New Mars » Increasing use » 2012-01-03 00:15:24

I think your political views are wrong also some possibly racist religious comment and my car brand is the only one people should purchase. 

Flame wars will increase the post count (^_^)

#27 Re: Human missions » Developing the cis-Lunar economy and infrastructure » 2012-01-02 23:57:41

JonClarke wrote:

I don't believe there is significant gold or mercury in lunar craters.  Not without good evidence.

JonClarke wrote:

...I can't stress strongly enough that I would believe the Apollo data over the LCROSS dat when it comes to the heavier elements.  The Apollo data is validated by hundreds of analyses using different methods.  The LCROSS data is a single analysis that can't be trusted to give meaningful results for heavier elements.  UV spectroscopy is great for volatitles, useless for anything else.
Those numbers are rediculous.  Several analyses of the target material with similar results by trustworthy methods - XRF, APX, ICPMS - would be a sifferent matter...

First of all Apollo never went to permenently shadowed regens so how could they have data about them?  And the data it did bring back seems to corroborate LCROSS.  Coreing samples where taken up to three meters deep, the upper most portions of those samples had depleted levels of gold but the lower samples did not.  There is a theory that the gold particles electrostatically repel themselves much farther than other elements after being struck by micro meteors and that they would accumulate in cold traps.  Mercury should accumulate for obvious reasons just like water. 

Certainly there needs to be more exploration before you start sending mining equipment, but just ignoring the evidence we do have is rather irresponsible.  I know there are allot of mars fans out there who wish everyone would pretend like the moon doesn't exist and deem it as a distraction.  I am just the opposite I think the moon is necessary for the future of life.  We can do allot of science on mars by going direct but if you want to get serous about colonization things can happen much more quickly if we have a large profitable enterprise that can fund the development of space infrastructure and get the launch rate up. 

I think platinum groups are a good possibility, the moon is a big place and its been there for a long time; bound to have been some low speed impacts of platinum bearing asteroids every once in a while.  But that sort of mining is relatively small scale compared to what an abundant supply of gold could sustain. 


There is a whole ecological angle too.  Mining on earth damages the environment, on the moon there are no endangered species to protect.  Imagine a future where gold is autonomously mined and kinetically shot back to earth.  So abundant that your grandchildren will wire there homes with it and find it amusing that it was once so valuable.

#28 Re: Meta New Mars » Increasing use » 2012-01-01 16:43:25

Go back in time, prevent the mars ending computer crash.  Also why did it take so long to come back?

We used to have quite a few search engine bots logged in all the time and we got very good search engine responses for many terms - that's what first attracted me, can we get that turned back on?

#29 Re: Human missions » Developing the cis-Lunar economy and infrastructure » 2012-01-01 16:40:56

Just a few points.

There's gold in them craters, enough to fund allot of fun and all the extra Hg will make refining the gold blissfully simple. 

Linear motors make a real nice low tech low cost alternative to rail guns. 

Original imported solar arrays could be retrofitted onto insitu concentratiors.  Production multijunction cells are already more than 40% efficient, and both silicon and multijunction cells are even more efficient under concentrated light so-long as they are kept cool.  Composite solar systems (concentrated pv coupled with heat recovery) are claiming over 70% efficiency.

#30 Re: Human missions » Developing the cis-Lunar economy and infrastructure » 2011-12-24 00:39:46

I like solar and it certainly has its place but there is a better solution for lunar mining and that is nuclear.  More than 50 years ago they where able to put reactors in submarines I'm sure we can manage to get one on the moon if we wanted to.   

The first lunar export will be entertainment flowed by normal lunar rocks going to collectors and enthusiasts.  I am skeptical about the demand for fuel early on but there is another valuable resource.  Apollo core samples detected drastically lower gold in the first little bit of regolith than in deeper areas.  LCROSS detected extremely elevated gold and mercury levels in cold craters.  Mercury makes sense for obvious reasons but gold dust is though to electrostatically propel itself after being struck by micro meters but the static is generated by sunlight so it migrates to the colder areas with the water and mercury. 

I think either platinum mined from asteroid impact zones or gold mined from cold traps should be explored for early utilization.  They come with a sure market ready to tap.

#31 Re: Interplanetary transportation » Reusable Rockets to Orbit » 2011-12-18 12:54:58

I think I may actually have a copy in my pile of books but I cant find it right now.  In any event It's available on amazon. 

http://www.amazon.com/gp/offer-listing/ … er=&colid=

#32 Re: Human missions » Developing the cis-Lunar economy and infrastructure » 2011-12-17 19:20:41

I assure you that microwaves do work on ice, just not as well.

#33 Re: Interplanetary transportation » Reusable Rockets to Orbit » 2011-12-15 00:55:09

From what I here SpaceX is now working on everything at once. 

Re-entry was too hard on even there first stage because it was moving way too fast, for a near term fix they will save a bit of fuel and reignite it to slow the rocket down before parachute splashdown recovery of the first stage. 

There is also the grasshopper version of the Falcon9 that has landing legs that pop out for a propulsive pad landing on all three stages (first second and dragon), heat shielding will be added where needed. 

http://www.youtube.com/watch?v=mQC72UZxZlQ

Burt Rutan is building the largest plane in the world to air drop a falcon 9 modified with a small delta wing. 

http://www.youtube.com/watch?&v=sh29Pm1Rrc0
http://www.stratolaunch.com

The delta wing is interesting addition on the air drop version, I am curious if perhaps they could use it for a horizontal landing on a dry lake bead or very long runway landing at a high speed and using drag chutes to slow it down.

#34 Re: Science, Technology, and Astronomy » The fusion age has begun. » 2011-12-10 00:09:48

The guy says that fusion happens even with out his fancy catalyst, I don't just want to be on the sidelines for something this big; I'm going to put it to the test. 

I found a makeshift schematic from a NASA paper on the subject, bought some nickle powder.  I have a well suited machine shop for the metal fab and have more than adequate vacuum pumps for degassing and I'm bidding on a guiger counter. 

http://newenergytimes.com/v2/government … rkshop.pdf

Josh when I turn it on and detect elevated gamma radiation will you eat a hat I give you?

#35 Re: Space Policy » The SLS: too expensive for exploration? » 2011-12-01 19:13:21

SpaceNut wrote:

What was missed so long ago in the mid to late 80's was to make use of slow but steady change to the existing platform to make what we would need today. Nasa did work of Shuttle c but only to a mock up level. If the shuttle c was an unmanned then we could have explored its orbiter to be a throw away as well with no heat sheild as a delivery vehicle. With the original down mass to be executed by the normal shuttle if need be. That said unmanned would also be to use a non man rated main engines such as the Rs68 instead of the Rs25 of the shuttle.

To put it bluntly Nasa should have followed what the Russians have been doing with its Progress and Soyuz vehicles....

Its not to late to go another way with the Delta IV or Altas V with the Russian model in this case but Nasa and the politicains need to stop draging there heals and get to paying as well as building to meet the goals that men need for space travel....

The Russians would have loved to use their space shuttle.  We just had more money to waist than they did.

#36 Science, Technology, and Astronomy » The fusion age has begun. » 2011-11-28 00:26:26

Adaptation
Replies: 156

After decades of perpetually being ten years away an economically viable repeatable low energy fusion reaction method has been developed, this will drastically change the amount of resources needed to start a mars colony.  They have sold 500kw heat plant operating at 200c, a recent development has allowed the inventor to increase the temperature to 400c which is suitable for efficiently producing electricity.  The previous generation of units where sold to military customers for $2/watt of heat energy.  To learn more google E-cat.

#37 Re: Science, Technology, and Astronomy » Compound parabolic reflectors - earth based zmp solar concentrator » 2011-11-22 22:43:39

I'm going to sell most of them as they are, I have them listed on ebay and plan on sell them at several other places.  But that doesn't mean I cant play with a few of them.  I've been thinking about compound solar concentrators for several years, I think I posted some stuff about them on this site but I think those posts are missing at the moment.  The Solyndra panels are rated at 85°C. I don't know if they will get too hot or not, I suppose that greatly depends on how large the concentrator are, I would like to triple the amount of power from each rod if I wanted to get 20x the power I would plan on jacketing the rods in another tube and circulating water through it.  What I am concerned with atm is localized heat like a linear beam hitting the rods instead of a more dispersed light across the 1" diameter tube.  I think if I build the concentrator by the book it will have problems but if I can pull it out of focus a bit I wont.  The stock I mill the termoformer mold is quite expensive and it takes a lot of time to mill so I would like to be fairly sure I have the design down before I get that far.

#38 Science, Technology, and Astronomy » Compound parabolic reflectors - earth based zmp solar concentrator » 2011-11-22 00:30:09

Adaptation
Replies: 8

So I bought 50kw of Solyndra solar panels and I was thinking they would work great compound parabolic reflector.  I'm just wondering if I should have the parabolas focus to the center of the cylinder or not, I think a strong pinpoint of light will damage the solar cells so I was wondering if I should place it slightly out of the focal point or if I should make the parabolas slightly non parabolic. 

I plan on vacuum thermoforming  plastic then coating it with foil tape at first and maybe do some evaporative deposition of metal later.

compound parabolic reflector

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