I agree all three types are necessary. Since I tend to be basically optimist about this type of stuff, I tend to not give the critics an equal weight. Bert ......
Well, the Panama Canal was a complete disaster that failed utterly and led to the financial ruin of a lot of investors. I am refering to the French attempt to...
The French tried to designed the Panama Canal, after the Suez design which was a mistake. Key things that evenually lead to the US success: 1.Lock system,...
Probably the most irresponsible means of deciding to mount a project is to use "statistics" as an argument as shown below. Let this be a lesson of how NOT to...
As a public health worker with some experience with asbestos-related disease, I can give you a few particulars which might help the engineering and physics...
Brad Walsh
epibeemie@...
May 21, 2008 2:23 am
8289
... particle sizes. Above a few microns in size, particles can be captured by cilia and mucous and eventually swept out of the body. Very small particles...
That is strong for paper, but way less than Kevlar (~3,000 Mpa) Here is a better link to the article: http://tinyurl.com/3toflo Jolly Roger Curnow ;-)X ...
... You need a minimum of 40 GPa, 40,000MPa usable tensile strength together with a relative density of about 2.5 to make a space elevator. So no, you would...
... You mean, to make a standard model elevator. Building a lunar L1 elevator even long enough to scrape our atmosphere is possible with existing materials...
... Oh, for a lunar elevator, sure. ... If by 'scrape our atmosphere' you mean get within ~100km of the Earth, I'm afraid that that's not possible with a...
... The idea doesn't really make sense anyway. The distance from the Earth to the Moon varies by about 50,000 km. That's a lot of reeling in or reeling out to...
... 42,000. ... It is, and that's the worst problem I've seen for a cislunar spanning elevator. It would require reeling part of it in and out at a rate of ...
A lunar space elevator could run through L1 and havee its "high point" on the Earth side of L1 some distance further; the Earth's gravity would help...
... It pretty much has to go beyond L1, doesn't it? You don't get a net upward force until you're high enough that centripetal overcomes gravity and, given how...
... You mean centrifugal, not centripetal (the Earth-moon system is easiest to analyse in a rotating reference frame- centrifugal force is 'real' in that...
... I'm not sure what you mean by "it" in this sentence. A luna-synchronous orbit? That would be an orbit around the Moon in which a satellite stays...
... L1 and L2 *are* lunasynchronous orbits. They're somewhat unstable, but not ridiculously so, and it turns out that they're stable enough to support space...
... Actually, Earth's gravity would have to *counteract* the centripetal force trying to push the entire lunar elevator towards the moon. The earth/moon...
In a message dated 6/13/2008 10:27:52 P.M. Central Daylight Time, kerrywilliams@... writes: "And then there's the lunar H3 that we'd be given instant...
GEddieA95@...
Jun 14, 2008 3:32 am
8306
... I don't think your wording there is quite correct. A near-side lunar SE is supported by the counterweight being in an area where the Earth's gravity...
... The earth/moon barycenter is within the earth, but I think I just said that. ... Exactly. Sort of. ... I just uploaded one to the files section It's in the...
... Good point, thanks. ... No, to get to the *tip* of the L1 elevator you just need 100 km of altitude with a ground speed of just over mach 1. It's fairly...
... Actually centri - petal means "center - seeking". In this context Earths gravity is (more or less) the centripetal force. The centrifugal ("center...
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