I think it isn't a rotavator either, because it talks about a tide-locked device. I am not sure about the nomenclature, but I think this sort of incomplete...
7614
Robert Munck
bobmunck
Dec 19, 2006 7:02 pm
... Yeah, you're right. I missed the parts about the upper and lower ends being at fixed altitudes. It may still be a rotavator, but a slow one, rotating just...
7616
Herbert Murray
hcm1955
Dec 20, 2006 5:47 pm
... that ... considered ... over ... http://msc.eldoc.ub.rug.nl/FILES/root/HossonJTMde/2006/NanoLettJankovi c/2006NanoLettJankovic.pdf ... Also see: ...
7617
tasha9503
tashatetratr...
Dec 21, 2006 6:39 am
thank you again but I read a light-weight CNT cable what dose CNT stand for? w w w . tasha9503 .c o m ... From: Herbert Murray To:...
7618
Ed Minchau
spider_boris
Dec 21, 2006 8:43 am
CNT stands for Carbon NanoTube. ... http://en.wikipedia.org/wiki/High-temperature_superconductor ... ...
7619
Herbert Murray
hcm1955
Dec 21, 2006 2:57 pm
Can you tell us a little about tasha9503, and where you think the Space Elevator may fit in?...
7620
Herbert Murray
hcm1955
Dec 21, 2006 3:16 pm
It is within the realm of possibility to build an Earth base SE with todays materiel. The taper ratio would be 10,000 to 1 using a carbon fiber called T1000....
7621
Herbert Murray
hcm1955
Dec 21, 2006 5:23 pm
... A good place to start reading, and find answers is The Edwards Reaports in the link section of this group: http://tinyurl.com/yga9vy Enjoy, Bert...
7622
tasha9503
tashatetratr...
Dec 22, 2006 6:25 am
I was asked to tell you a little so I will keep it under 500 words NASA offered their used ET's (External Tanks off the shuttles)(now numbering 20) to any one...
7623
Patrick Boake
pbboake
Dec 22, 2006 1:28 pm
Hi Herbert, I'll be following T1000 CNT up Nicola Pugno the person who said a few months ago that the current cable design wouldn't work because of a surfeit...
7624
Andreas
awnd329
Dec 24, 2006 1:56 am
... The problem with this, I think, is that the mass of such an SE is such that the device could not even launch its own weight worth of payload into space...
7625
Herbert Murray
hcm1955
Dec 28, 2006 3:21 am
Sorry I am slow responding to the post. I am now just going online since the Christmas break. Nicola Pugno's argument assumes that the defect rate for making...
7626
Herbert Murray
hcm1955
Dec 28, 2006 4:08 am
By scaling down the climber to possibly an insect size device the surface area to volume ratio will work against the most efficient transportation of payload....
7627
pbboake
Dec 28, 2006 3:45 pm
... wrote: ... ... Pugno said to me in an email that he is working on a new tether design which means to me he must think that with technical progress a new ...
7628
Herbert Murray
hcm1955
Dec 28, 2006 9:05 pm
That is good news. I believe the goal of the SE community should be to come up with a workable design for an Earth based SE, using today's tech. When CNTs of...
7629
Andreas
awnd329
Dec 28, 2006 9:11 pm
... Exponential growth can be frustratingly slow. My savings account with interest grows exponentially, at 4% or so per year. Yet, I do not expect to become...
7630
Andreas
awnd329
Dec 28, 2006 9:21 pm
... Unfortunately, there is no such thing. That is why we are a fringe group (and proud of it). Andreas...
7631
Herbert Murray
hcm1955
Dec 29, 2006 4:32 am
Where did 10,00 trips come from? The taper ratio is a ratio of area, not a fraction of payload to total ribbon mass. Let's assume a ribbon laying robot starts...
7632
Herbert Murray
hcm1955
Dec 29, 2006 4:37 am
I am not convinced SE with todays tech, is so unreachable. We really don't know unless the project is seriously attempted. Cheers, Bert...
7633
Andreas
awnd329
Dec 29, 2006 3:28 pm
... The maximum payload is proportional to the cross section at the bottom. The mass of the SE is proportional to the cross section at GEO. If the taper is...
7634
Andreas
awnd329
Dec 29, 2006 3:31 pm
... There are many things that are not worth attempting. For example, I know I won't make it to the moon on my bicycle without seriously trying. Andreas...
7635
Herbert Murray
hcm1955
Dec 29, 2006 4:00 pm
... If the ribbon was made from CNTs per Edwards 2000: Strength 1.3 E11 N/M2 Density 1.3 E3 Kg/M3 Ribbon Mass 2.95 E5 Kg Capacity 2 E4 Kg Safety...
7636
Patrick Boake
pbboake
Dec 29, 2006 4:06 pm
... In the Liftport Book (page 27) Sir Arthur C. Clarke talks about the early days of rocketry and doing escape velocity calculations using the best known...
7637
Herbert Murray
hcm1955
Dec 29, 2006 4:08 pm
... really don't know unless the project is seriously attempted. ... If there is chance of it working it should be tried. At this point I believe there is a...
7638
Andreas
awnd329
Dec 30, 2006 4:35 am
... Not the same. Proportional, though. Since the difference is not in our favor, this adds another order of magnitude to the problem. Andreas...
7639
Andreas
awnd329
Dec 30, 2006 4:50 am
I am not saying it is impossible, I am just saying not with "todays tech", or more specifically, with any known material. This was well known to the earliest...
7640
Herbert Murray
hcm1955
Dec 30, 2006 6:40 am
... I agree the ratio is not in our favor. This just means a way needs to be found to send payloads more often. Instead of thinking in terms of a climber and a...
7641
Herbert Murray
hcm1955
Dec 30, 2006 6:43 am
We should look under every stone before the giving up on building a SE with todays tech. Cheers, Bert...
7642
Patrick Boake
pbboake
Dec 30, 2006 3:26 pm
... Do we really have to bring the mass up there? What about producing it in space from raw materials from a near-Earth asteroid? "As with asteroids, comets...
7644
Herbert Murray
hcm1955
Dec 31, 2006 4:17 am
... twenty first century. Whereas asteroids are rich in the mineral raw materials required to build structures in space, the comets are rich resources for the...
