[00:01] jones__ (n=jones@adsl-69-106-240-206.dsl.pltn13.pacbell.net) joined #highaltitude. [00:06] natrium42 (n=natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) joined #highaltitude. [00:10] jones_ (n=jones@adsl-69-106-244-148.dsl.pltn13.pacbell.net) left irc: Read error: 104 (Connection reset by peer) [00:12] sbasuita (n=sbasuita@unaffiliated/drebellion) left irc: Read error: 110 (Connection timed out) [00:13] http://www.lidl.co.uk/cps/rde/xchg/lidl_uk/hs.xsl/index_7777.htm [00:15] jones_ (n=jones@adsl-69-106-255-74.dsl.pltn13.pacbell.net) joined #highaltitude. [00:15] jones__ (n=jones@adsl-69-106-240-206.dsl.pltn13.pacbell.net) left irc: Read error: 60 (Operation timed out) [00:22] jones_ (n=jones@adsl-69-106-255-74.dsl.pltn13.pacbell.net) left irc: Read error: 104 (Connection reset by peer) [00:29] a "teaflow" oven :P [00:30] pity heat lamp bulbs are so expensive [00:31] I'm off, cya [00:33] praying_mantissa (n=praying_@D-69-91-148-78.dhcp4.washington.edu) joined #highaltitude. [00:33] Laurenceb: well - yes and no [00:34] http://radionics.rs-online.com/mobile/search/searchBrowseAction.html?method=retrieveTfg&binCount=1&Ne=4294957972&Ntt=1000w+linear&Ntk=I18NAll&Nr=AND%28avl%3aie%2csearchDiscon_ie%3aN%29&Ntx=mode%2bmatchallpartial&N=4294955376&Nty=1 [00:36] jones_ (n=jones@adsl-69-106-246-224.dsl.pltn13.pacbell.net) joined #highaltitude. [00:45] jones_ (n=jones@adsl-69-106-246-224.dsl.pltn13.pacbell.net) left irc: Read error: 60 (Operation timed out) [00:46] jones_ (n=jones@adsl-69-106-244-196.dsl.pltn13.pacbell.net) joined #highaltitude. [00:48] Laurenceb (n=laurence@host86-140-198-16.range86-140.btcentralplus.com) left irc: Read error: 110 (Connection timed out) [01:01] N900evil (n=Speedevi@tor/regular/SpeedEvil) left irc: Read error: 104 (Connection reset by peer) [01:10] praying_mantissa (n=praying_@D-69-91-148-78.dhcp4.washington.edu) left #highaltitude. [01:15] jones_ (n=jones@adsl-69-106-244-196.dsl.pltn13.pacbell.net) left #highaltitude. [01:42] jasonb (n=jasonb@dsl027-180-244.sfo1.dsl.speakeasy.net) left irc: Read error: 110 (Connection timed out) [01:52] bittwist (n=User@unaffiliated/bittwist) joined #highaltitude. [02:05] hmm [02:05] dont suppose anybody is still up? [02:06] Action: juxta is testing lithium batteries in dry ice, the energizer cells are doing worse than the no brand ones so far [02:11] well - dry ice is a bit colder [02:11] energiser lithium? [02:15] SpeedEvil: yeah, energizer lithium [02:15] and some 'eclipse' lithiums [02:16] after about 15 minutes in the dry ice, the energizers are good for about 150mA, the eclipse are managing about 750mA [02:16] and an alkaline is ~2mA [02:16] NiMH is good for about 5mA [02:38] praying_mantissa (n=praying_@D-128-208-51-166.dhcp4.washington.edu) joined #highaltitude. [02:39] praying_mantissa (n=praying_@D-128-208-51-166.dhcp4.washington.edu) left #highaltitude. [02:57] 2mA! [02:57] Appalling. [02:58] at -75C or whatever dry ice is - which is colder than any part of the sane atmosphere - it'll be frozen [02:58] -78 says wikipedia [02:59] You're not adding a heating element with the batteries and electronics? [02:59] Perhaps -10C is more manageable for the poor battery cells. [03:02] well - -75C is ~25-30C colder than the outside temp of a typical flight [03:02] and it's easily 50C colder than what you'll get with fairly minimal insulation [03:03] Extreme destructive tests. Me like. :) [03:03] N900evil (n=Speedevi@tor/regular/SpeedEvil) joined #highaltitude. [03:05] SpeedEvil: So, -25c-ish is the ballpark figure to go after when testing high altitude equipment? [03:08] well it's not an unrealistic figure [03:08] insulated and dissipating a bit of power [03:09] work out the insulative value of a small thickwall box [03:15] I read an interesting comment on HaD.com about a high altitude project. Well, the poster began rambling about lying to the gov't, funding et cetra, but the basic idea was interesting. [03:17] He proposed a mini high-altitude UAV which were to be launched high up by high altitude ballons. Once it was up there, it would be released, and stay there by means of solar power. [03:19] It could be remotely controlled from the ground, and perhaps even carry sensors to monitor gas levels, ratiation, etc. [03:19] A poor mans satellite of sorts. [03:19] Anybody have thoughts about this idea? [03:37] praying_mantissa (n=praying_@D-128-208-51-166.dhcp4.washington.edu) joined #highaltitude. [03:47] largely pointless [03:47] If it can sustain its level at high altitude [03:47] then it can climb at low [03:48] The hard part is the batteries [03:48] juxta (i=fourtytw@ppp118-210-157-25.lns20.adl6.internode.on.net) left irc: Read error: 60 (Operation timed out) [03:48] it's got to have battery power to last >8 hours [03:48] and it's got to have solar cells big enough to recharge them while flying [03:58] natrium42 (n=natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) left irc: "Leaving" [05:41] praying_mantissa (n=praying_@D-128-208-51-166.dhcp4.washington.edu) left #highaltitude. [05:55] jasonb (n=jasonb@m445336d0.tmodns.net) joined #highaltitude. 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[11:17] bittwist (n=User@unaffiliated/bittwist) left irc: Read error: 113 (No route to host) [11:17] Nick change: SpeedEvil1 -> SpeedEvil [11:24] http://hackaday.com/2010/01/21/live-high-altitude-balloon-launch [11:26] lol at comment by "Drone" [11:27] juxta (i=fourtytw@ppp118-210-157-25.lns20.adl6.internode.on.net) joined #highaltitude. [12:30] blomlet_ (n=quassel@cpc4-dals16-2-0-cust522.hari.cable.virginmedia.com) joined #highaltitude. [12:48] blomlet (n=quassel@cpc4-dals16-2-0-cust522.hari.cable.virginmedia.com) left irc: Read error: 110 (Connection timed out) [13:21] Action: Laurenceb got accel/magno ellipse fitting working [13:22] this sparkfun 6DOF data is interesting - it seems to converge on a solutuion to within 1mg or so [13:23] juxta_ (n=blah@ppp118-210-72-193.lns20.adl2.internode.on.net) joined #highaltitude. [13:23] I forget - you bought one? [13:23] hi all [13:23] but the standard deviation of the accel data is about 10mg - as it was handheld [13:23] Or are you working off ohters date [13:23] hi j [13:23] no, from the sparkfun forum [13:23] aj [13:23] hi juxta, are you on hackaday? [13:24] yeah I am Laurenceb [13:24] neat, good luck with the project [13:24] cheers [13:25] someone just pointed out the stupidity of our CASA regulations in the comments [13:25] ie that payload weight can be upti 4kg, but balloon diam cannot exceed 2m at any time during flight [13:27] bb this evening, cya all [13:32] Does it say anywhere it has to be spherical? [13:33] For example - a 2m dia*10m cylinder [13:43] KingJ (n=KingJ-FN@oops.i.forgot.to.set.my.hostmask.kingj.net) got netsplit. [13:43] jontyw (n=jontyw@jonty.co.uk) got netsplit. [13:46] jontyw (n=jontyw@jonty.co.uk) returned to #highaltitude. [13:46] KingJ (n=KingJ-FN@oops.i.forgot.to.set.my.hostmask.kingj.net) returned to #highaltitude. [14:16] bt42 (n=User@unaffiliated/bittwist) left irc: Read error: 104 (Connection reset by peer) [14:26] hey SpeedEvil [14:26] it doesnt explicitley mention that [14:26] but they handle approval on a case by case basis [14:27] unsure why the documentation is even there - they're making me carry all this stuff which the regs dont mention [14:27] ie audible warning, radar reflector etc [14:50] juxta_ (n=blah@ppp118-210-72-193.lns20.adl2.internode.on.net) left irc: Read error: 110 (Connection timed out) [14:56] bittwist (n=User@unaffiliated/bittwist) joined #highaltitude. [15:08] juxta_ (n=blah@ppp118-210-72-193.lns20.adl2.internode.on.net) joined #highaltitude. [15:17] jasonb (n=jasonb@adsl-66-124-73-250.dsl.sntc01.pacbell.net) joined #highaltitude. [15:30] juxta_ (n=blah@ppp118-210-72-193.lns20.adl2.internode.on.net) left irc: Read error: 110 (Connection timed out) [15:34] jiffe1 (n=jiffe@64.251.162.157) left irc: Client Quit [15:35] jiffe (n=jiffe@64.251.162.157) joined #highaltitude. 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