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Messages 8194 - 8226 of 8993   Oldest  |  < Older  |  Newer >  |  Newest
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8194
... I'm amazed by how many people get hung up on the travel time to orbit. As Monte Davis wrote - The initial elevator will be for cargo -and - humans make up...
Vern McGeorge
vernmcgeorge
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Oct 4, 2007
5:34 am
8195
The first generation space elevator needs to be thought about as a system to move stuff into space for 1 % of what it now costs. it is not about travel time it...
Herbert Murray
hcm1955
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Oct 4, 2007
10:40 pm
8197
... http://www.sandia.gov/media/NewsRel/NR2001/flyer.htm ... a ... this...
Herbert Murray
hcm1955
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Oct 4, 2007
11:01 pm
8198
... transport ... Just to set the record straight, I did not write the above excerpt and mostly agree with Vern. ... Right. These people must have been quite...
Andreas
awnd329
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Oct 5, 2007
3:57 am
8199
Here is a link to an article claiming a breakthrough in bonding nanotubes to a plastic like material. http://www.physorg.com/news110727530.html Looks...
spacelifejunkie
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Oct 5, 2007
2:39 pm
8201
... BTW Space Elevator is mentioned on page 35 of the report...
Herbert Murray
hcm1955
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Oct 11, 2007
1:35 am
8202
It seems unlikely to me that DOD would finance anything unless it is maneuverable enough to avoid satellite killer missiles. [Non-text portions of this message...
roger curnow
rogertheunbe...
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Oct 11, 2007
10:34 pm
8203
DOD is more likly to put up an anti missle system to protect SPS systems. It was a divison of DOD the organized the study and is making positive sounds in...
Herbert Murray
hcm1955
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Oct 12, 2007
8:45 am
8204
Here are two problems with the Edwards Space Elevator that no one on this group or anyone else in the SE community seems to be talking about. 1.DURABILITY....
Barry
bseegebarth
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Oct 14, 2007
6:17 pm
8205
With some more research and development, this could be the right pathway to our needed SE ribbon. Looks enticing. Harvey spacelifejunkie...
harvey trevillion
hetrevillion
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Oct 14, 2007
6:17 pm
8206
On the issue of durability - many designs currently call for climbers which build up the tether bit by bit as they climb it. Similarly "repair" climbers could ...
Simon Hastings
terenot
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Oct 14, 2007
6:28 pm
8207
... Quite possibly because it is fairly well covered in his book. A wide, flat ribbon is resistant to appreciable damage from micrometeorites. Having a base...
Jo Jaquinta
jim_plummer
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Oct 14, 2007
10:53 pm
8208
... Section 10.2 of Edwards report in the link section of this group (found at: http://www.spaceelevator.com/docs/472Edwards.pdf) explains how the baseline...
Herbert Murray
hcm1955
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Oct 15, 2007
12:55 am
8209
Yes this is a positive development. Edwards baseline design is 60% CNTS with the balance as some type of substrate. The polymer matrix referenced in the...
Herbert Murray
hcm1955
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Oct 15, 2007
1:07 am
8210
The inflatable space tower idea is nothing new. There are several designs being proposed in the scientific community. Most notable is the one being floated...
Barry
bseegebarth
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Oct 15, 2007
8:40 am
8211
The inflatable tower would have to have considerably more pressure in its walls than one atmosphere at the bottom of the tower, or else it would collapse. If ...
Ed Minchau
spider_boris
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Oct 15, 2007
12:06 pm
8212
Barry, As a structural engineer I have to agree with Ed's assessment. If you draw a free body diagram just below the pulley attachment and actually calculate...
Paul Wolfenbarger
phred4269
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Oct 16, 2007
12:38 pm
8213
Here are your calculations Ed. The material I would suggest using would be readily available graphite epoxy, like that used for aircraft with a weight of...
Barry
bseegebarth
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Oct 17, 2007
7:31 am
8214
Scanning thru Bolonkin's paper "Optimal Electrostatic Space Tower" left me with a basic question: Is the electron gas referenced in the paper: A. Electron...
Herbert Murray
hcm1955
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Oct 17, 2007
5:06 pm
8215
Putting aside the fantastic 120,000 km tower filled with the fabled "electron gas" (which I have never heard of) of Mr Bolognkin, it is reasonable to assume a...
Andreas
awnd329
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Oct 17, 2007
7:03 pm
8216
Had you bothered to read only as much as just the Wikipedia article on the space elevator, you would have found meteorite damage and malfunctions of various...
Andreas
awnd329
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Oct 17, 2007
7:08 pm
8217
In a message dated 10/17/2007 2:09:02 P.M. Central Daylight Time, awnd329@... writes: Although some would like to, people will probably never ride the...
GEddieA95@...
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Oct 17, 2007
7:30 pm
8218
Commercial spaceflight has only very recently come down to the decamegabuck range (from non-existence), and there is still a lot of room for improvements, even...
Andreas
awnd329
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Oct 17, 2007
9:01 pm
8220
... After reading thru the paper again, I believe I got it all wrong. I will post comments later. Still a working model needs to be built to demo the concept ...
Herbert Murray
hcm1955
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Oct 18, 2007
11:29 am
8221
... on ... soak ... Personally, I have always had the view that the ribbon would have a cover. I know, I know. The weight! The weight! No problem, it's gotta...
musthavemorestuff
musthavemore...
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Oct 19, 2007
8:15 pm
8222
For those that are in the NYC area A.BOLONKIN will be speaker at NSS Chapter event. One may even have a chance to ask him about electron gas. Since the other...
Herbert Murray
hcm1955
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Oct 19, 2007
9:16 pm
8223
Hi, I agree that the cost should be more realistic, perhaps $2B. In addition to the restaurant, cell-phone antenna, and upper atmospheric research station, one...
Dave Handwerk
dhandwerk
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Oct 26, 2007
7:32 pm
8224
... The tower/mass driver combination is not too outrageous an idea. Unfortunately electromagnetic mass drivers are neither small nor light. A better solution...
Andreas
awnd329
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Oct 28, 2007
4:03 am
8225
... Nice idea, but it would need lots of work in making sure everything's balanced. Graham...
Graham Addis
grahamaddis
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Nov 2, 2007
12:22 pm
8226
... Balancing the sling will be a walk in the park once you've balanced that 100 mile tower... Seriously, all it takes is a counterweight. The tower will have...
Andreas
awnd329
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Nov 2, 2007
6:31 pm
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