[00:00] jcoxon (n=jcoxon@host86-146-165-217.range86-146.btcentralplus.com) left irc: "Leaving" [00:09] Laurenceb (i=83e3dd23@gateway/web/ajax/mibbit.com/x-82ab6902f2d25f3c) joined #highaltitude. [00:10] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) left irc: [00:16] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) joined #highaltitude. [00:17] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) left irc: Client Quit [00:28] hi [00:34] hi [01:04] http://www.readwriteweb.com/archives/a_new_twist_to_the_adobe_vulnerability.php [01:05] ^ thats what happened to my machine a while back :-/ [01:12] :/ [01:18] borism_ (n=boris@195-50-199-18-dsl.krw.estpak.ee) got netsplit. [01:18] borism (n=boris@195.50.199.18) joined #highaltitude. [01:29] borism_ (n=boris@195-50-199-18-dsl.krw.estpak.ee) got lost in the net-split. [02:30] Laurenceb (i=83e3dd23@gateway/web/ajax/mibbit.com/x-82ab6902f2d25f3c) left irc: "http://www.mibbit.com ajax IRC Client" [03:28] sYx66 (n=Miranda@bas1-kitchener06-1177578097.dsl.bell.ca) left irc: Read error: 110 (Connection timed out) [07:00] Simon-MPFH (n=simon@phantom.mpfh.co.uk) joined #highaltitude. [07:14] jcoxon (n=jcoxon@host86-145-224-2.range86-145.btcentralplus.com) joined #highaltitude. [07:22] morning [07:39] G8KHW (n=Steve@217.47.75.27) joined #highaltitude. [07:41] hey G8KHW [07:43] hiya jcoxon [07:44] I just placed an order on the farnell site and got "The minimum Credit card order value is £20.00" any clues as to how I can avoid that? [07:45] hmmm, unfortunately not [07:46] just trying to login to see how much my previous orders were [07:47] js is still bad this weekend [07:47] i fear though that when the JS gets better for launching here that will be the end of the great trans-atlantic JS paths [07:47] yeah - the w/e after maybe [07:47] looks a bit better [07:48] I'll drop u a text sometime about a little idea I have [07:48] http://imagebin.org/40946 :-( [07:49] perhaps the trade account was a good idea after all [07:49] http://uk.farnell.com/frequently-asked-questions#OJ [07:50] G8KHW, sounds good - always keen to hear ideas... [07:51] yeah thats what I thought - there is an advantage - no min order and free next day [07:52] ok gotta go 2 work [07:52] cu [07:52] G8KHW (n=Steve@217.47.75.27) left irc: "Leaving" [07:57] G8KHW_ (n=RocketBo@82.132.136.193) joined #highaltitude. [07:59] G8KHW_ (n=RocketBo@82.132.136.193) left irc: Client Quit [08:06] defy (n=defy@ip-118-90-92-149.xdsl.xnet.co.nz) joined #highaltitude. [08:08] hey defy [08:08] hey jcoxon, hows things? [08:08] good thanks [08:08] you? [08:09] pretty good [08:09] studying, just thought i'd pop in and see how you guys were doing [08:09] well we haven't launched in the UK for quite a while, the JS has been terrible [08:10] but we've been working on a trans-atlantic payload [08:10] made quite a lot of progress [08:10] yea you mentioned last time i was here, thats sounds pretty interesting [08:10] http://spacenear.us/wiki [08:11] do you hope to recover it? [08:11] ummm if it managed to make it yes [08:12] but for the first attempt i reckon teh chances are low [08:13] you really need some kind of cheap global communications dont you...satellite communication is so expensive =/ [08:13] oh we might have that sorted [08:13] we use it on our aircraft and its normally a couple of dollars per position report, it gets expensive when you're sending out one a minute [08:13] a hacked SPOT transmitter [08:13] its a simplex transmitter on globalstar [08:14] we've also got HF radio [08:14] so hopefully will be able to track it [08:14] cool, what kind of range do you get with the radio? [08:14] is spot an ELT? [08:15] more of a personal tracker [08:16] http://international.findmespot.com/ [08:16] the radio potentially trans-atlantic [08:16] on the band i sometimes can pick up US stations [08:16] yea im looking at it, very interesting...i didnt think you were allowed to use 406mhz for tracking...or is the tracking on a different frequency? [08:16] however they use a lot more power [08:17] oh its 40m so 7Mhz [08:17] we have 406mhz elt's and if we set them off our opperator starts getting phone calls from our international airport and SAR teams in the city, lol [08:18] is there a service charge? [08:18] yeah there is but its okay [08:18] we'll only be sending the coords occasionally say once an hor [08:18] hour* [08:19] "$49.99/yr USD Tracking Upgrade Option" wow thats cheap [08:19] natrium42, has slightly hacked into it to get control so we can send our own data [08:21] ontop of $115 usd, thats still pretty cheap if its a flat fee, i'd consider getting one if it is... [08:22] yeah its pretty cheap [08:22] they don't update much, i think you can get a message through every 5 to 10 mins [08:22] yea this other site says every 10 minutes [08:22] chat to natrium42 some time he knows most of the info [08:23] i'm personally working on the ballast system for the balloon [08:23] im going to be doing a lot of flying over some bad countryside soon, might be worth having some extra tracking [08:23] it seems a good deal [08:25] hopefully by the end of this year i'll have dusted off all my gumstix and made an attempt at launching a balloon, i've made some friends at school that are keen on helping [08:25] amazing [08:26] have got a good way of doing the radio with the gumstix now [08:26] yea? what are you using? [08:26] with a radiometrix attached directly to the audio out [08:26] and then generting wav files and playing them [08:26] steve has made code for rtty, packet and MFSK for it [08:26] you get good range with those? [08:27] in theory a couple of hundred km [08:27] wow [08:27] yeah [08:27] right i've got to dash [08:27] cya defy [08:27] sweet, talk to you later :) [08:27] jcoxon (n=jcoxon@host86-145-224-2.range86-145.btcentralplus.com) left irc: "Leaving" [08:31] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) joined #highaltitude. [08:39] edmoore_ (n=edmoore@pomegranate.chu.cam.ac.uk) joined #highaltitude. [08:39] edmoore_ (n=edmoore@pomegranate.chu.cam.ac.uk) left irc: Client Quit [08:47] G8KHW_ (n=RocketBo@82.132.136.221) joined #highaltitude. [08:48] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) left irc: Read error: 113 (No route to host) [09:04] jiffe88 (n=jiffe2@209.159.247.189) left irc: [09:29] icez (n=icez@unaffiliated/icez) left irc: "Lost terminal" [09:35] G8KHW_ (n=RocketBo@82.132.136.221) left irc: "Bye chaps" [11:50] G8KHW_ (n=RocketBo@82.132.136.195) joined #highaltitude. [11:52] G8KHW_ (n=RocketBo@82.132.136.195) left irc: Client Quit [12:24] mc- (n=mfcastle@cpc3-glfd1-0-0-cust439.glfd.cable.ntl.com) joined #highaltitude. [12:31] natrium42, are you awake? [12:34] mc- (n=mfcastle@cpc3-glfd1-0-0-cust439.glfd.cable.ntl.com) left irc: [14:06] defy (n=defy@ip-118-90-92-149.xdsl.xnet.co.nz) left irc: [14:23] mc- (n=mfcastle@cpc3-glfd1-0-0-cust439.glfd.cable.ntl.com) joined #highaltitude. [14:32] mc- (n=mfcastle@cpc3-glfd1-0-0-cust439.glfd.cable.ntl.com) left irc: [15:22] Laurenceb (i=83e34f19@gateway/web/ajax/mibbit.com/x-6ccb3ca840f9bbfe) joined #highaltitude. [16:16] natrium (n=alexei@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) joined #highaltitude. [16:18] natrium42 (n=alexei@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) left irc: Read error: 110 (Connection timed out) [17:20] Laurenceb (i=83e34f19@gateway/web/ajax/mibbit.com/x-6ccb3ca840f9bbfe) left irc: "http://www.mibbit.com ajax IRC Client" [17:27] jatkins (n=jatkins@79-68-32-234.dynamic.dsl.as9105.com) joined #highaltitude. [17:30] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) joined #highaltitude. [17:58] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) left irc: [17:59] hallam (i=836f0142@gateway/web/ajax/mibbit.com/x-e422bdcb28cea173) joined #highaltitude. [17:59] fergusnoble: digikey stuff's here [17:59] In today's episode of "Henry burns himself doing something stupid" watch as we discover that the hot side of a Peltier junction is actually quite hot [18:07] Hiena (n=Hiena@81.93.195.181.datatrans.hu) joined #highaltitude. [18:12] Simon-MPFH (n=simon@phantom.mpfh.co.uk) left irc: "Leaving" [18:19] Xenion (n=robert@p579FC454.dip.t-dialin.net) joined #highaltitude. [18:20] :) [18:20] BTDT [18:20] Guten Abend alle miteinander :-) / Good evening folks ! :-) [18:20] though as a caveat, some sorts of peltier are at their absolute maximum temperature at 'serious burns' stage [18:27] edmoore (n=edmoore@chu-gw.churchillcambridge.co.uk) joined #highaltitude. [18:31] edmoore (n=edmoore@chu-gw.churchillcambridge.co.uk) left irc: Client Quit [18:36] natrium (n=alexei@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) left irc: Remote closed the connection [18:40] Laurenceb (n=laurence@dyres221-35.surrey.ac.uk) joined #highaltitude. [18:40] hi [18:40] hi. [18:40] Note to self: [18:41] 10 sheets of 25mm kingspan doesn't really fit in a micra, even if you cut it in half. [18:41] do a Mr Bean? [18:42] It's fragile enough that it'd atomise in any wind at all [18:44] jcoxon (n=jcoxon@host86-145-224-2.range86-145.btcentralplus.com) joined #highaltitude. [18:45] evening all [18:45] hi [18:45] #mikrokopter [18:45] hi jcoxon [19:00] hey Laurenceb [19:02] hey jatkins [19:02] hi [19:03] hows it going? [19:03] good thx. you? [19:03] tired [19:04] bbl [19:04] jatkins (n=jatkins@79-68-32-234.dynamic.dsl.as9105.com) left irc: "Wow! What a great client! Bersirc 2.2 [ http://www.bersirc.org/ - Open Source IRC ]" [19:24] Xenion (n=robert@p579FC454.dip.t-dialin.net) left irc: Remote closed the connection [19:35] Action: jcoxon has tubing [19:40] jatkins (n=jatkins@79-68-32-234.dynamic.dsl.as9105.com) joined #highaltitude. [19:41] hallam (i=836f0142@gateway/web/ajax/mibbit.com/x-e422bdcb28cea173) left irc: "http://www.mibbit.com ajax IRC Client" [19:44] Xenion (n=robert@p579FC454.dip.t-dialin.net) joined #highaltitude. [19:50] :) [19:51] jatkins[1] (n=jatkins@79-68-32-234.dynamic.dsl.as9105.com) joined #highaltitude. [19:52] there is something very satisfying about the click of a solenoid [19:53] jcoxon: you need some denatured alcohol. [19:53] Action: SpeedEvil passes jcoxon a bottle of vodka with added dog-milk. [19:54] hehe [19:54] right well it works with water [19:54] one annoying thing is that the common port and the NC port are very closed together [19:54] so i had to trim the tubing a little [19:54] natrium42 (n=alexei@24.114.232.2) joined #highaltitude. [19:57] icez (n=icez@unaffiliated/icez) joined #highaltitude. [20:05] jatkins (n=jatkins@79-68-32-234.dynamic.dsl.as9105.com) left irc: Read error: 113 (No route to host) [20:07] jatkins[1] (n=jatkins@79-68-32-234.dynamic.dsl.as9105.com) left #highaltitude. [20:07] jatkins (n=jatkins@79-68-32-234.dynamic.dsl.as9105.com) joined #highaltitude. [20:09] natrium (n=alexei@24.114.233.17) joined #highaltitude. [20:09] natrium (n=alexei@24.114.233.17) left irc: Remote closed the connection [20:15] hey natrium42 [20:19] natrium42 (n=alexei@24.114.232.2) left irc: Read error: 110 (Connection timed out) [20:20] anyone seen watchmen? [20:20] tany good? [20:26] http://nickscipio.com/pod/2009/03/10/mutant-snowman/ :) (nsfw site, though worksafe pic) [20:58] G8KHW (n=Steve@217.47.75.27) joined #highaltitude. [21:03] jcoxom: BTW the burst pressure on a PET fizzy drinks bottle is about 150PSI (10bar) - so would easilly contain things filled at ground pressure [21:05] at 20C [21:05] I'm not completely sure what happens at -55C when you take a 1 bar container, and depressurise it to 0 bar [21:07] umm. ~0.7 bar, thank you Mr Boyle. [21:09] shellevil, the bottle will be stable, but fragile. [21:10] I made a similar test in the heat chamber. [21:11] Filled PET bottle to 3 bar and set to -60. [21:11] Hindsight, never ever try to drop it. [21:12] :) [21:15] Also found the -60 plexiglass means it will not disappear at this temperature, but it will be useless. [21:17] I means not so much differenties between the frozen PET bottle properties and a frozen mil grade plexiglass. [21:18] jatkins (n=jatkins@79-68-32-234.dynamic.dsl.as9105.com) left irc: Read error: 104 (Connection reset by peer) [21:20] G8KHW, thanks [21:20] i've got some tubing now so can test [21:24] Hiena (n=Hiena@81.93.195.181.datatrans.hu) left irc: "-=Mi ez a szag? Hippit égettéll?=-" [21:25] also not too sure avout the chemistry of PET and glycol alcohol (if you plan to use that) - so also worth a try [21:26] yeah [21:26] will get some tomorrow [21:27] we should use the cheapy plastic bottles that you can get vodka in [21:27] :-p [21:28] natrium42 (n=alexei@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) joined #highaltitude. [21:32] hey natrium42 [21:35] hi [21:37] got the valves working [21:38] am running 2L or water through now [21:38] seeing how long it takes [21:38] whoa, nice [21:38] at normal pressure [21:38] looking good? [21:38] yeah [21:38] what head? [21:38] head? [21:39] height of fluid columb is sometimes rrefered to as 'head' [21:39] oh right [21:39] it a 2L bottle [21:39] and then [21:40] a further 5cm to the valve [21:40] 2l bottle with a vent in the top? [21:40] the bottle top is off [21:41] the valve is connected to a tube going into the upright bottle, and the valve is 5cm below the base? [21:41] jcoxon, pics plz [21:41] dimensioned :D [21:45] http://www.flickr.com/photos/jcoxon77/3347859896/ [21:45] hehe [21:45] i'm low on tape... [21:46] lol [21:47] is that water? [21:47] yup [21:48] i'll get some denatured alcohol tomorrow [21:48] If you were feeling energetic, you could from that image compute the radius of the drops, and from their spacing, the flow-rate [21:49] hehe [21:50] i think the valve will be fine [21:50] size wise [21:50] and its running off 2 x AAA NiMh [21:54] 600mls in 15mins [21:54] bbiab [21:55] Sounds like 1ml/s with alcohol is plausible [22:01] Xenion (n=robert@p579FC454.dip.t-dialin.net) left irc: "Verlassend" [22:14] SpeedEvil (n=kjjfgjfj@mauve.plus.com) left irc: Read error: 110 (Connection timed out) [22:16] oh dear, STS delayed [22:18] :/ [22:18] orly? [22:18] to tomorrow? [22:19] boo ya [22:19] sunday or monday [22:19] jcoxon, we better have no leaks on *our* mission :P [22:21] hmmmm [22:21] eep shit, speaking of fuel leaks [22:21] gonna need to epoxy everything [22:21] I need to get my mate to bring his car round, well my car really [22:21] so I can put a hose clip on the fuel filler pipe [22:22] I did tell him not to fill the car beyond half a tank or turn it on its side [22:23] "Dear NASA, a carefully-applied Ligarex clip will probably help you with your fuel leaks. It did for mine. Yours, Gordon" [22:23] lol [22:23] i am sure they will listen [22:23] :P [22:24] natrium42, hows the flight 'puter going? [22:25] i worked on some GPS stuff [22:26] damn RF :/ [22:26] i will probably hire a company to do the RF section for me [22:26] no luck? [22:26] i have no idea how to do antenna matching [22:26] and it's not working if i connect it directly [22:27] (through a 100pF cap) [22:27] that's for the chip antenna, btew [22:29] R (number of check bytes in RS code word): 16  16  S (RS code word size in DMT frame): 2  8  [22:29] gah [22:32] Action: jcoxon searches for a 5L bottle [22:33] Action: shellevil has one right here. [22:34] (well, 2.4m up, 1m west.) [22:46] G8KHW (n=Steve@217.47.75.27) left #highaltitude. [23:40] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) joined #highaltitude. [23:49] SpeedEvil (n=kjjfgjfj@mauve.plus.com) joined #highaltitude. [23:55] jcoxon (n=jcoxon@host86-145-224-2.range86-145.btcentralplus.com) left irc: "Leaving" [23:55] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) left irc: [00:00] --- Thu Mar 12 2009