highaltitude.log.20080124

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[02:40] <kc0wys_> natrium: just saw your launch on hackaday
[02:40] <kc0wys_> very nice :)
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[09:10] <jcoxon> natrium42, sorry about the all the zeusbot crap
[09:10] <jcoxon> just read it in the logs
[09:10] <jcoxon> was away
[09:10] <jcoxon> still trying to get to the bottom of it
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[09:27] <jcoxon> lalalalalalalalalalalala
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[09:44] <Laurenceb> hi all
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[10:44] -:#highaltitude- *** Notice -- TS for #highaltitude changed from 1201171381 to 1164523384
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[10:44] Topic changed on #highaltitude by !irc.freenode.net: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) see www.ukhas.org.uk and wiki.ukhas.org.uk, zeusbot logs: http://users.gridstar.net/~zeusbot/
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[11:17] <Laurenceb> hi all
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[12:28] <Laurenceb> hi ed
[12:28] <edmoore> hi lb
[12:28] <Laurenceb> check the wiki
[12:29] <edmoore> link
[12:30] <Laurenceb> http://wiki.ukhas.org.uk/projects:aerosol
[12:31] <edmoore> pretty - what's the main pcb?
[12:31] <Laurenceb> ngw100
[12:31] <edmoore> cool
[12:32] <edmoore> right back after lunch
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[12:39] <Laurenceb> hi all
[12:55] <Laurenceb> anyone any good with python?
[13:19] <Laurenceb> bbl
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[15:57] <edmoore> hi fnoble_
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[16:46] <neontube> evening all
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[18:15] <Hiena> Good evening!
[18:16] <natrium42> hi
[19:15] <Hiena> Well, since i'm done with my mails, may i ask a few questions, about the balloons?
[19:18] <natrium42> gotta go soon
[19:18] <natrium42> maybe anybody else is online?
[19:19] <Hiena> At my free time i'm working on several UAV and UL projects. One of the tests, is the drop test, where the modell hang to a balloon and lifted to few hundred meters and dropped. Usually we use a hot air balloon and stacked a dosen modells in it. The problem is the cost.
[19:19] <natrium42> ah
[19:20] <natrium42> laurenceb has been doing that
[19:20] <natrium42> with his rogallo
[19:20] <natrium42> drop tests from a tethered helium balloon
[19:21] <Hiena> Some years ago i used a hydrogen filled trashbags and party balloons as the pylons for modell racing, but these too small for the 4-5 kg modells.
[19:21] <natrium42> right
[19:22] <natrium42> helium is pretty expensive
[19:22] <natrium42> but you an reuse the balloon
[19:22] <natrium42> *can
[19:23] <Hiena> Yup. Also, i made an about 3 cubic meter trashbag balloon and filled with hot air, but it's too sensitive to the hot air.
[19:23] <natrium42> gotta run, sorry
[19:24] <natrium42> bye
[19:24] <Hiena> The question is, anybody has experience building a cheap hot-air balloon.
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[19:48] <edmoore> not me
[19:48] <edmoore> only helium
[19:49] <edmoore> construction of balloons is very very time consuming
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[20:33] <Hiena> Well, the 3 cubic meter trashbag balloon was done within one hour, and kept it's shape 30 minutes long.
[20:33] <edmoore> oh I thought you meant big ones
[20:33] <edmoore> we made a 22 cubic meter zero pressure balloon a few weeks ago
[20:34] <edmoore> 20 gores, high molecular weight polyethylene
[20:34] <edmoore> that took a while, although we did build all the plastic welding equipment too
[20:36] <Hiena> No. I need only a small one. And a hot-air type if it's possible. My hydrogen generator was stolen at the last summer, so now i have a lack of lifting gas.
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[21:54] <Hiena> Well, time to set my AOA to zero.
[21:54] <Hiena> Good night all!
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[00:00] --- Fri Jan 25 2008