highaltitude.log.20081218

[00:07] <Laurenceb> I saw an interesting proposal to build a electrostatic space tower
[00:08] <Laurenceb> I think there was a bit error in the calculations
[00:09] <Laurenceb> but its an interesting idea to use electrostatic repulsion and polymer films
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[00:19] <Laurenceb> well I'm off, cya guys
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[15:41] <edmoore> hi jcoxon
[15:41] <edmoore> how far north are you?
[15:41] <jcoxon> hy edmoore
[15:41] <jcoxon> am in tromso
[15:41] <edmoore> seen anything yet?
[15:41] <jcoxon> 400km
[15:41] <jcoxon> nothing yet
[15:42] <jcoxon> its quite clear
[15:42] <jcoxon> but activity is low right now
[15:42] <jcoxon> should increase over the weekend
[15:42] <edmoore> there ain't much north left to go!
[15:42] <jcoxon> hehe
[15:43] <jcoxon> i've been thinking about a HAPS northern lights mission
[15:45] <jcoxon> especially the logistics of it all
[15:45] <edmoore> it would be epic
[15:45] <edmoore> and 'kin awesome
[15:45] <edmoore> i would so take hobble out
[15:45] <jcoxon> its do able
[15:45] <edmoore> i wonder if the boreales intefere with radio?
[15:46] <edmoore> i guess it's all LoS UHF still so no biggie
[15:46] <jcoxon> yeah that shouldn't be a problem
[15:46] <jcoxon> the difficulty is retrieval
[15:46] <jcoxon> the terrain ain't exactly kind
[15:46] <edmoore> indeed
[15:47] <edmoore> you'd need a helicopter
[15:47] <edmoore> they're not stupidly expensive per hour, but not cheap either
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[17:48] Nick change: Bluenarf -> EI5GTB
[17:49] <fergusnoble> edmoore: hello
[17:49] <edmoore> yo
[17:49] <edmoore> how's it going?
[17:49] <fergusnoble> good, back home now
[17:49] <fergusnoble> made a small zp on the machine
[17:50] <edmoore> yeah, henry said - v exciting
[17:50] <SpeedEvil> :)\
[17:50] <SpeedEvil> polythene?
[17:51] <fergusnoble> yup
[17:51] Action: SpeedEvil needs to get his ZP done.
[17:51] <SpeedEvil> Test ZP
[17:51] <SpeedEvil> natural gas/foil.
[17:51] <fergusnoble> this was 20m long and 3m diameter
[17:52] <fergusnoble> so pretty small, about 100m^3 i think
[17:52] <fergusnoble> but proves the machine works
[17:52] <fergusnoble> SpeedEvil: going to use natural gas?
[17:53] <SpeedEvil> fergusnoble: yes
[17:53] <SpeedEvil> For a test at least, it's just fine.
[17:53] <fergusnoble> for cheapness?
[17:53] <edmoore> SpeedEvil is going to eat lots of beans
[17:53] <SpeedEvil> yes.
[17:53] <SpeedEvil> And convenience.
[17:53] <SpeedEvil> It comes out of a hose in my kitchen, vs get a cylinder or ...
[17:53] <fergusnoble> how light is it?
[17:54] <SpeedEvil> about half atmosphere
[17:54] <fergusnoble> we found hot air is good for testing
[17:54] <SpeedEvil> so it's significantly worse in performance
[17:54] <SpeedEvil> Lots better than hot air.
[17:54] <fergusnoble> yeah, but good enough to test
[17:54] <edmoore> there is an easy solution - pour NaOH into a pressure cylinder full of heluminium foil. screw the lid tight and leave to safely produce hydrogen
[17:54] <edmoore> full of aluminium*
[17:54] <SpeedEvil> edmoore: yes - but I'm pondering a Al balloon.
[17:55] <edmoore> SpeedEvil: ok easy
[17:55] <SpeedEvil> edmoore: I worry about the remaining aerosolised lye.
[17:55] <fergusnoble> why Al for the balloon?
[17:55] <edmoore> have a fuel injecftor squirt some naoh in
[17:55] <SpeedEvil> fergusnoble: why not?
[17:55] <edmoore> to periodically increase lift by producing H
[17:55] <SpeedEvil> fergusnoble: 11um foil is commonly available, cheap, not too weak.
[17:55] <SpeedEvil> fergusnoble: and has really good porosity compared to polythene
[17:55] <edmoore> and you can spray NaOH in
[17:55] <fergusnoble> sounds good
[17:56] <SpeedEvil> And is of course UV immune.
[17:56] <edmoore> and you can spray NaOH in
[17:56] <fergusnoble> also you can join it by welding
[17:56] <SpeedEvil> The problem of course is metal fatigue, and it's not trivially available in sizes >1m or so.
[17:56] <edmoore> good luck welding ali foil
[17:56] <SpeedEvil> fergusnoble: in principle, but in practice, I'm gluing.
[17:57] <fergusnoble> ok
[17:57] <SpeedEvil> fergusnoble: tests of a 0.1mm or so thread of hot-melt in freezer and at room temp, ironed flat between sheets indicate a _very_ good join.
[17:57] <fergusnoble> cool
[17:57] <fergusnoble> think it will be cheaper than PE?
[17:57] <SpeedEvil> No need for a radar reflector either :)
[17:58] <SpeedEvil> fergusnoble: probably it's a wash.
[17:58] <SpeedEvil> fergusnoble: it's a fair bit more assembly certainly.
[18:00] <SpeedEvil> The only absolute benefit I can see has a lot of ifs.
[18:01] <SpeedEvil> If you can get the sealing right, and it's full of hydrogen, and it's working properly, it could have _very_ long duration.
[18:01] <fergusnoble> worth a try though
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[18:45] <EI5GTB> sterling rawks :D
[18:45] <EI5GTB> fur the euro :P
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[20:39] <jcoxon> evening all
[20:40] <EI5GTB> phai
[20:40] <EI5GTB> ohai
[20:40] <EI5GTB> stfu zeusbot
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[20:41] <mc-> how about a free pcb? http://www.spiritcircuits.com/gonaked.aspx
[20:43] <mc-> ok, nobody is interested..
[20:44] Action: EI5GTB shows some interest
[20:44] <EI5GTB> how free is free?
[20:44] <mc-> free
[20:44] <mc-> guess you have to pay postage
[20:44] <EI5GTB> like, i give you my plans and you send them tto me over here in ireland for nothing
[20:44] <EI5GTB> aa
[20:44] <EI5GTB> so theyre not free for me
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[20:50] <Xenion> Guten Abend jungs ! :-)
[20:51] <jcoxon> hey Xenion
[20:52] <Xenion> hello folks :-)
[20:55] <jcoxon> hows the payload coming along?
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[21:39] <rjharrison> Hi natrium
[21:39] <rjharrison> evening all
[21:39] <rjharrison> fergusnoble
[21:40] <fergusnoble> hi
[21:40] <EI5GTB> grr, anyone here kind enbough to send me a few p[und in paypal?
[21:40] <rjharrison> How much do you need
[21:41] <EI5GTB> im like 8 euro short
[21:43] <EI5GTB> its not that im being a cheapscate, its just that i have no handy way of getting the money in my hands into money in paypal..
[21:47] <rjharrison> Give me your email
[21:47] <rjharrison> I'll pop you 8 in
[21:47] <EI5GTB> :D
[21:47] <EI5GTB> paul@paulsnet.org
[21:48] <EI5GTB> ill send you somthing for xmas if you give me your postal adress!
[21:49] <rjharrison> 8 euros enough
[21:50] <EI5GTB> lemme just double chek
[21:50] <EI5GTB> yea#
[21:50] <EI5GTB> thats perfect
[21:50] <EI5GTB> should leave me with 50 cent to spare
[21:51] <rjharrison> should be there
[21:51] <rjharrison> depends how fast paypal is
[21:52] <rjharrison> any joy?
[21:52] <EI5GTB> OMG thanks :D
[21:52] <EI5GTB> srsly, send me your postall adress and ill send you somthing nice
[21:56] <rjharrison> PM'ed it to you
[21:56] <rjharrison> BTW waht are you getting?
[21:58] <EI5GTB> ktnx
[21:58] <EI5GTB> an ipphone
[21:58] <EI5GTB> cisco :D
[21:58] <rjharrison> Cool
[21:58] <EI5GTB> not a iphone an ip phone
[21:58] <rjharrison> Nice shack just browsed your site
[21:58] <rjharrison> Yep I knew what you ment
[21:58] <EI5GTB> cool, thanks
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[22:11] Action: SpeedEvil sighs.
[22:11] <SpeedEvil> I bought an EEEPC.
[22:11] <SpeedEvil> It arrived, and after a couple of hours of frustration, I find that the disk is throwing errors.
[22:12] <SpeedEvil> :/
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[22:14] <rjharrison> I won an ocilloscope tonight
[22:14] <rjharrison> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120350791324&fromMakeTrack=true#ebayphotohosting
[22:18] <natrium42> rjharrison, cool
[22:18] <natrium42> new toy
[22:20] <SpeedEvil> My first DOA disk, and it's flash.
[22:20] <SpeedEvil> :/
[22:20] <rjharrison> natrium42 yep
[22:20] <rjharrison> Should be ok for AVR work
[22:20] <rjharrison> Any comments appreciated
[22:20] <rjharrison> Will pick it up tomoorow
[22:21] <SpeedEvil> Seems OK.
[22:21] <rjharrison> Thanks for that SpeedEvil
[22:55] <SpeedEvil> Oh
[22:55] <SpeedEvil> I also forgot to mention the other interesting thing from amazon.
[22:55] <SpeedEvil> The packaging.
[22:56] <SpeedEvil> Take two bits of plastic, and weld them in sinuous lines
[22:56] <SpeedEvil> Like
[22:57] <SpeedEvil> ( )
[22:57] <SpeedEvil> ) (
[22:57] <SpeedEvil> ( )
[22:57] <SpeedEvil> So it ends up like figure-8s end to end
[22:57] <SpeedEvil> It's sort of like bubble wrap
[22:57] <SpeedEvil> but instead of each bubble just popping, they are all interconnected.
[22:58] <SpeedEvil> well - rows of them are interconnected
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[23:53] <Laurenceb> ello
[00:00] --- Fri Dec 19 2008