Brad Edwards chose a 100m/s climber ribbon feed estimate. This results in a speed of 360km/h (about 200miles/h), not 200km/h. So 8640km a day and GEO in 4...
7017
Brian Dunbar
economic_ref...
Mar 1, 2006 11:53 pm
... An early objection to rollers and caterpillar drives was that existing caterpillar drives are low speed, high maintenance affairs. It just occurred to me...
7018
Herbert Murray
hcm1955
Mar 3, 2006 3:37 am
A critical path in developing a space elevator is method or process that will fuse or bond CNTs to each other or to a substrate so that the load can be...
7019
Robert Munck
bobmunck
Mar 3, 2006 5:25 am
... Or maybe we'll be able to design climbers that exceed the speed of light and reverse time, so we'll be able to send cargo up the SE before it's even been...
7020
Andreas
awnd329
Mar 3, 2006 7:25 pm
... I do not agree with this assessment. If the CNT are long enough (mm-range), no fusing is needed. The vdW forces between parallel CNT, although weak, will...
7021
Ray Drouillard
ka8uuu
Mar 4, 2006 2:33 am
... Very good assessment. I'm actually in favor of weaving them. I would use a kind of a flattened rope weave (a weave similar to that used in woven rope)....
7022
Robert Munck
bobmunck
Mar 4, 2006 3:05 am
... Why?...
7023
Ray Drouillard
ka8uuu
Mar 4, 2006 4:28 am
... Essentially, because there is no adhesive involved at all. The strength reduction in strength caused by moving the fibers 2 degrees from vertical (3.5%)...
7024
Brian Dunbar
economic_ref...
Mar 4, 2006 1:29 pm
... You are _so_ in trouble for giving away the Big Secret. David's already built the FTLL (FTL Lifter) - it's in his garage next to the Delorean. -- Brian...
7025
Andreas
awnd329
Mar 5, 2006 6:04 am
... ballistic. ... Ballistic electron transport is a microscopic phenomenon. I don't think anyone seriously thinks it can be made to work macroscopically. Even...
7026
Ray Drouillard
ka8uuu
Mar 5, 2006 4:48 pm
... *** from a previous post of mine *** [...] Also, one conduction mode is for the electrons to be ballistically sent down the center. Not technically a...
7027
northernchronic
Mar 5, 2006 9:57 pm
... sent ... Yes. This makes CNTs Field Effect Transistors. Useful for making thin TV screens and maybe CNT paper someday. How does this apply to the SE?...
7028
Herbert Murray
hcm1955
Mar 6, 2006 12:24 am
... fiber ... will ... NIST thinks so: http://www.nist.gov/public_affairs/releases/n02-17.htm Also: ...
7030
Herbert Murray
hcm1955
Mar 6, 2006 3:33 pm
... Room temp superconductor nanotube may be possible: http://superconductors.org/roomnano.htm...
7031
Herbert Murray
hcm1955
Mar 6, 2006 3:43 pm
... process ... that ... other ... strength. ... If ... (or ... the ... perfect ... they ... not, ... ballistic. ... superconductors -- ... cm. ... But the...
7032
abexman2000
Mar 7, 2006 2:36 am
Have one week to submit a 3-5 page introduction on the topic. Have some crumbs to start with. Please contact me if interested. abecker1 at gmail.com...
7033
blturner3
Mar 8, 2006 2:49 pm
I am working on a climber for the Spaceward climber competition. It is a thermal engine. I am looking for alternatives to the traditional search light for...
7034
Ian Woollard
wolfekeeper
Mar 8, 2006 3:00 pm
... Yes, but you need a largeish parabolic dish to aim it. The wavelength of microwaves is ~12cm so the dish has to be large relative to that otherwise the...
7035
Herbert Murray
hcm1955
Mar 8, 2006 3:47 pm
The power that needs to be delivered to the climber is in the 1 to 5 Kwatt range. If your where to use a search light then you are talking about a 10Kw light....
7036
blturner3
Mar 8, 2006 5:42 pm
The largish parabolic dish is the show-stopper. The biggest cost of visible searchlights is the parabolic reflector. If a microwave based solution has the same...
7037
kyros
terenot
Mar 8, 2006 6:06 pm
You should be aware there are other teams on this list too :p I'm curious what people hafto say on this matter as well though, but I would rather not share my...
7038
Ian Woollard
wolfekeeper
Mar 8, 2006 6:26 pm
... It's not really the same thing though. The microwave dish may be bigger, but its probably much cheaper. Because of the long wavelength you don't need to...
7039
Herbert Murray
hcm1955
Mar 8, 2006 10:43 pm
The search light can be rented. For the required set of PVs with 20% or better eff will cost you about 10K(USD), as you stated the microwave option is easier...
7040
Andreas
awnd329
Mar 8, 2006 10:45 pm
With a 10 meter chickenwire dish, and a 10 m rectenna, you might be able to get decent power transfer up to about a 800 m or so, according to the old rule of...
7041
Herbert Murray
hcm1955
Mar 8, 2006 11:01 pm
I believe the old style 3 Meter SAT-TV dish might do the trick. You should email Ben (@elevator2010) to see if that is acceptable in terms of footprint. I...
7042
RanulfC@...
Mar 8, 2006 11:13 pm
... thermal ... power ... microwaves ... list. Probably the wrong search parameters, look up 'Microwave Thermal Thruster Concept' that should get you in the...
7043
Ian Woollard
wolfekeeper
Mar 8, 2006 11:32 pm
... Electric heater? (Might well be the way to go in fact, the electric heater gives high temperatures, whereas the microwave power is likely to be diffuse; ...
7044
Herbert Murray
hcm1955
Mar 9, 2006 1:50 pm
It might be easier to build a maser which focuses energy better than a Magneton. See plans for 1 to 5 KW maser http://www.plans-kits.com/kits.html Also using...
7045
blturner3
Mar 9, 2006 2:10 pm
Thanks for all the input. As most of you figured out it's all about cost vs power. I can make some estimates from the information you have provided. As we get...
7046
Ian Woollard
wolfekeeper
Mar 9, 2006 3:31 pm
... Ok, one last idea to put in your pipe: With the microwave idea- one other approach you could try is rather than building a wacky-shaped parabolic, you...
