Would any type of active feedback be possible, much like the active bridge control being considered for responding to earthquakes? Paper on bridge design:...
7390
Andreas
awnd329
Jun 23, 2006 7:23 pm
... I think it would be very difficult to control (actively or passively) a 40,000 km long contraption moving at orbital velocity in a dynamically unstable...
7391
Herbert Murray
hcm1955
Jun 23, 2006 10:01 pm
... simulates ... I think it is great that you are putting some type of anaylsis together that is open for review. Please take your time. Also I should be...
7392
Andreas
awnd329
Jun 24, 2006 12:19 am
... Any active ecomponents are out of the question. The ribbon is extremely thin and light. Stabilizing the angle of attack and preventing flutter are serious...
7393
hetrevillion
Jun 25, 2006 3:13 pm
Hi folks, I just read G. K. O'Neill's '2081', a combination of fact and speculation by one of the foremost space habitat designer/enthusiasts. In it, he...
7394
Andreas
awnd329
Jun 26, 2006 3:43 am
... [...] Should this have read 1-2 *thousand* km? Because that is what is required for acceleration to orbit at 2 g. I do not know what that linear...
7395
Pedro Macanas
pmacv
Jun 26, 2006 7:21 am
... From: Andreas To: space-elevator@yahoogroups.com Sent: Monday, June 26, 2006 5:43 AM Subject: [space-elevator] Re: Aerostat and linear accelerator to...
7396
Herbert Murray
hcm1955
Jun 28, 2006 5:00 pm
... prevent ... will ... to ... can ... drag ... If it possible to develop an inherently stable design, then that would be the preferred approach. But if not...
7397
Andreas
awnd329
Jun 29, 2006 3:35 pm
... For the first working aerovator, a more appropriate analogy would be to a pioneering early airplane. Those were not nearly as complicated as a 747, but...
7398
Herbert Murray
hcm1955
Jun 29, 2006 5:20 pm
... of ... all ... mail, ... If ... like ... replacing ... but ... Agree, I got a little carried away with the 747 comment. But the problems of flying a...
7399
kyros
terenot
Jun 29, 2006 6:09 pm
... Can we make it out of something other then paper? I bet you with carbon fiber ribs, titanium mesh, and some careful use of curved edges it could survive at...
7401
Herbert Murray
hcm1955
Jun 29, 2006 6:51 pm
... velocity, ... the ... The model might be someting like this: http://www.airtoi.com/pulse.htm...
7402
Pedro Macanas
pmacv
Jun 30, 2006 6:52 am
One could create a scale model of microgravity (earth orbit), earth, pulsejet, space elevator and a weight in a test room. And see how it works. Regards. ...
7403
Herbert Murray
hcm1955
Jun 30, 2006 12:51 pm
How would one create microgravity in a test room? Unless you are talking about a jet (like NASA's KC 135 "vomit comet") following a parabolic trajectory free...
7404
Herbert Murray
hcm1955
Jun 30, 2006 1:47 pm
I wonder if there is a business opportunity to buy up the surplus shuttles, once NASA retires them. The redesign the system would require reusable external...
7405
kyros
terenot
Jun 30, 2006 6:25 pm
I suspect noone but a government could afford the cost. Reengineering it would possibly be as expensive as having them do it. This is, even used, infact,...
7406
Herbert Murray
hcm1955
Jun 30, 2006 7:43 pm
Is is certainly not a start up project, but big Corporations like Boeing, and Lockheed Martin could form a joint effort, if they thought there was a market,...
7407
blenster
Jun 30, 2006 8:11 pm
I thought they were promised to museums and such already... Blenster ... http://blenster.blogspot.com/...
7408
Herbert Murray
hcm1955
Jun 30, 2006 9:02 pm
Rent them from the musemums. Musemum will always need/want money Bert...
7409
Herbert Murray
hcm1955
Jul 6, 2006 6:55 pm
There should be a place for SE in NASA's Mars plan: http://www.space.com/news/060706_mars_report.html...
7410
hetrevillion
Jul 10, 2006 2:42 pm
... orbit. ... could cost less than send goods to the space (orbit). ... earth. ... As in my last post, where do the re-entry bodies come from? If launched...
7411
hetrevillion
Jul 10, 2006 2:47 pm
... The mentioned 1-2 km. size is the diameter of the aerostat. He said one mile, actually. het ... Could the CNTs be woven into a fabric and made airtight?...
7412
Andreas
awnd329
Jul 10, 2006 10:52 pm
... large ... So, a single 1 km diamater balloon is going to lift up a 1-2 thousand km track made of magnets? I would like to see that calculation. ... I'd bet...
7413
Edward Brophy
faustic
Jul 11, 2006 11:41 am
... distance, ... and ... I remember a caller on The Space Show suggesting a circular mass accelerator but he hadn't figured out several problems such as ...
7414
Andreas
awnd329
Jul 14, 2006 3:19 am
... Interesting idea. But, then, the reason the linear accelerator needs to be so long is the g-force limit. Making it circular does not solve that at all. ...
7416
R.K. Hardman
dilettantelu...
Jul 16, 2006 5:46 pm
http://www.space.com/businesstechnology/technovel_nanotubes_060602.html [Non-text portions of this message have been removed]...
7417
Herbert Murray
hcm1955
Jul 16, 2006 7:08 pm
CNTS may have a strength of 300 GPA. If you look at Blaise Gassend paper on Exponential Tethers we may only need about 50 GPA. CNT/Nanotech research is still...
7418
kyros
terenot
Jul 16, 2006 7:12 pm
This has been discussed extensivly in the space elevator world. If you can find Brad Edward's reply to it, it's well worth reading. Space.com is about 2 months...
7419
Brian Dunbar
economic_ref...
Jul 16, 2006 7:15 pm
... Downer? Nah. Interesting data? Yes. See Liftport's response by Tom Nugent at http://www.liftport.com/progress/wp/?p=839 -- Brian Dunbar System...
7420
Ed Minchau
spider_boris
Jul 16, 2006 8:01 pm
One problem with Pugno's study is that it assumes a requirement for individual nanotubes to be very long. However, imagine for a moment that a short nanotube...
