highaltitude.log.20060123

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[16:30] malgar (n=malgar@adsl-ull-11-138.47-151.net24.it) joined #highaltitude.
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[18:30] <phatmonkey> hi jcoxon!
[18:31] <phatmonkey> http://www.jpaerospace.com/away26/away26launch.jpg
[18:31] <jcoxon> hey
[18:31] <phatmonkey> how about two cheap ebay balloons?
[18:31] <phatmonkey> I might experiment with it
[18:31] <phatmonkey> ... or more
[18:32] <jcoxon> definitly an interesting idea
[18:32] <jcoxon> serious issues though with drag
[18:32] <jcoxon> as in its going to be doubley blow
[18:32] <jcoxon> hey malgar
[18:32] <jcoxon> welcome to #highaltitude
[18:34] <phatmonkey> yeah
[18:35] <malgar> hi jcoxon ! I remember last week when you joined in #space.. and yesterday i read an article about your hobby on universetoday.. so i asked to a guy if he search your nick in the log
[18:35] <malgar> ;)
[18:37] <malgar> do you know paul verhage?
[18:37] <malgar> http://www.universetoday.com/am/publish/satellites_budget.html?1912006
[18:52] <jcoxon> ooo sorry got distracted
[18:52] <malgar> :)
[18:52] <malgar> np
[18:53] <jcoxon> i don't know paul verhage
[18:53] <malgar> ok
[18:53] <jcoxon> i did read the article though (off a digg link)
[18:54] <jcoxon> he takes a slightly different approach to me
[18:54] <jcoxon> as in he is a traditional HAM balloonist
[18:54] <malgar> i like your hobby. I have a small rocket. I like to laucnh it but a balloon surely has a much better elevation/$ ratio
[18:55] <malgar> aha
[18:55] <jcoxon> oh defintely
[18:55] <jcoxon> but balloons have their limits
[18:56] <jcoxon> :D
[18:56] <malgar> how much costs all your project?
[18:56] <jcoxon> ummm the first launch was less the £400
[18:57] <jcoxon> $700
[18:57] <jcoxon> however my second launch will be a lot cheaper - i broke alot of parts and had to get new ones
[18:57] <jcoxon> slightly more experienced this time
[18:58] <malgar> how could i start? I have a great problem. i live on alps... and launch a balloon from here could mean of don't find it anymore
[18:59] <jcoxon> hehe
[18:59] <malgar> firstly i need a plain
[18:59] <malgar> :)
[18:59] <jcoxon> well there are a few approaches
[18:59] <jcoxon> for example my system relies on a parachute to descend so its passive
[19:00] <jcoxon> phatmonkey though is working on a glider which will fly to a choosen coordinate
[19:00] <malgar> is possible in your opinion to start with something little? or don't worth?
[19:00] <malgar> ahh that in yhe wiki?
[19:00] <malgar> I haven't read it yet!
[19:00] <jcoxon> and synco (who comes on this channel occasionally) does it in New Zealand (glider system)
[19:01] <jcoxon> my system is probably the cheapest though
[19:01] <malgar> heh ok
[19:01] <jcoxon> apart from the use of a gumstix instead of a PIC processor
[19:01] <jcoxon> the cheapest would be
[19:01] <jcoxon> gps->PIC->mobile phone
[19:02] <jcoxon> a box
[19:02] <jcoxon> balloon
[19:02] <jcoxon> and helium
[19:02] Action: malgar doesn't know anything about pic.. a bit mor about linux
[19:02] Action: jcoxon agrees - PICs are silly
[19:02] <jcoxon> i use a gumstix running linux
[19:02] <malgar> i read
[19:02] <malgar> :)
[19:03] <jcoxon> a little bit more expensive though
[19:03] <malgar> how old are you? i'm 22
[19:03] <jcoxon> hehe
[19:03] <jcoxon> 20
[19:07] <phatmonkey> PICs are very low power
[19:07] <phatmonkey> http://www.gpsw.co.uk/details/prod2402.html
[19:07] <jcoxon> true true
[19:07] <phatmonkey> I think I'll get that
[19:07] <malgar> where could i learn about pic? :) my level is 0
[19:08] <malgar> google: pic tutorial?
[19:08] <malgar> ;)
[19:08] <jcoxon> guess so
[19:08] <phatmonkey> learn the pic assembly language, and buy a pic programmer!
[19:08] <phatmonkey> jcoxen: how much current does the gumstix draw?
[19:08] <jcoxon> phatmonkey, looks good
[19:08] <phatmonkey> I want a nice, high quality gps
[19:09] <phatmonkey> losing gps lock for an autopilot isn't great
[19:09] <jcoxon> very true
[19:09] <phatmonkey> how much current does your gumstix draw?
[19:09] <jcoxon> ummm not sure
[19:09] <jcoxon> gumstix.org would say :D
[19:10] <phatmonkey> ah
[19:10] <phatmonkey> I looked on gumstix.com
[19:10] <phatmonkey> wowee, you're still on the front page
[19:11] <jcoxon> yup
[19:11] <jcoxon> obviously no one has done anything new
[19:12] <jcoxon> phatmonkey, "The USB version produces data only in the GARMIN proprietary format."
[19:12] <jcoxon> is that an issue?
[19:12] <phatmonkey> that's why I'm getting the LVC version ;)
[19:13] <jcoxon> :D
[19:14] <phatmonkey> I'll just wire the lvc version straight up to a usb-serial adaptor
[19:14] <phatmonkey> or the on board serial port I guess
[19:14] <phatmonkey> I'm going to rip up a bunch of usb-serial adaptors off ebay
[19:14] <phatmonkey> save weight on the rs 232 connectors
[19:14] <jcoxon> good idea
[19:14] <malgar> jcoxon, can i see the downward pictures from your balloon?
[19:14] <jcoxon> i'm about to decide a date
[19:14] <jcoxon> for pegasus II
[19:14] <malgar> are there online?
[19:14] <malgar> they
[19:15] <malgar> is it ready?
[19:15] <jcoxon> well yes they are but are zipped up
[19:15] <jcoxon> one sec i'll get a link
[19:15] <phatmonkey> argh, can't find any power consumption stats for gumstix
[19:15] <jcoxon> phatmonkey, there are some i'll find it
[19:16] <phatmonkey> okay
[19:16] <jcoxon> malgar, pegasus II works - just requires the payload to be packaged, me to get cameras and wire up the geiger counter
[19:16] <jcoxon> malgar, http://www.srcf.ucam.org/~jac208/pegasus/archive1.zip
[19:17] <jcoxon> http://www.srcf.ucam.org/~jac208/pegasus/archive2.zip
[19:17] <jcoxon> phatmonkey, http://www.gumstix.org/tikiwiki/tiki-view_faq.php?faqId=8
[19:18] <malgar> jcoxon, what an adventure.. i'm looking at better the images.. they are stunning
[19:18] <jcoxon> :D i was very lucky!
[19:19] <phatmonkey> ah, thanks
[19:21] <phatmonkey> very lucky to find it too ;)
[19:21] <phatmonkey> http://www.jpaerospace.com/video.html
[19:21] <phatmonkey> have you seen those videos?
[19:21] <jcoxon> yup
[19:21] <phatmonkey> absolutely fascinating
[19:21] <phatmonkey> I never saw the videos on their site
[19:21] <jcoxon> jpaerospace do some very cool things
[19:21] <phatmonkey> yeah
[19:21] <jcoxon> got a little more experience then us :D
[19:21] <phatmonkey> I must stick a video camera on the front of our glider at some point...
[19:21] <phatmonkey> yeah!
[19:23] <malgar> jcoxon, what is the time between two images?
[19:23] <jcoxon> 1 minute
[19:23] <jcoxon> i seem to remember
[19:24] <malgar> did you tried to stitch them? :D
[19:24] <jcoxon> nope
[19:24] <jcoxon> but craig from gumstix did - didn't really work
[19:25] <malgar> ah
[19:25] <phatmonkey> it would be very interesting to try a free fall, but it might a tad dangerous in the uk
[19:25] <phatmonkey> a few backup parachutes, or have three at the same time like the apollo missions
[19:25] <malgar> craig is a guy?
[19:27] <phatmonkey> I'll ask art about parachute releases too - all the ones I"m doing at the moment rely on servos, and I don't fully trust a servo interface
[19:27] <phatmonkey> especially when it's via usb straight from the slug
[19:28] <phatmonkey> if we release it with a relay or something off the I2C PIC, it can figure out itself if it needs to release a parachute if the computer were to die
[19:28] <jcoxon> from what i understand most launches have the parachutes already deployed
[19:28] <phatmonkey> I'm thinking about the glider
[19:28] <phatmonkey> but free fall launches /would/ be fun :D
[19:28] <jcoxon> yeah i know
[19:29] <jcoxon> just saying it would be slightly unexplored territory
[19:29] <phatmonkey> somebody else did it
[19:29] <phatmonkey> I've forgotten the link
[19:29] <phatmonkey> he helped me design the balloon release widget
[19:29] <phatmonkey> argh
[19:29] <phatmonkey> a sort of long, stable missile type thing
[19:30] <phatmonkey> I believe he reached many hundreds of miles per hour
[19:30] <jcoxon> malgar, yeah craig works for gumstix
[19:30] <phatmonkey> pretty cool, but a tad dangerous in a built up place like the uk
[19:30] <phatmonkey> he probably did in some american desert, lol
[19:30] <jcoxon> :D
[19:31] <phatmonkey> we could always take a trip to america to do some insane missiles
[19:31] <phatmonkey> or somewhere deserted like belgium
[19:31] <jcoxon> phatmonkey, well....
[19:31] <phatmonkey> the cows won't mind us
[19:32] <jcoxon> i might be spending a month in Niger launching balloons this summer
[19:32] <jcoxon> hehe
[19:32] <phatmonkey> :o
[19:32] <phatmonkey> wowee
[19:32] <jcoxon> with the Cambridge
[19:32] <phatmonkey> really? wow!
[19:32] <phatmonkey> what are you thinking of launching?
[19:32] <phatmonkey> I'll design a slug powered missile if you want :D
[19:34] <jcoxon> well its going to be with the atmospheric chemistry department
[19:34] <jcoxon> so they'll be lauching big payloads
[19:35] <jcoxon> the nasa style ones
[19:35] <phatmonkey> ooh
[19:35] <jcoxon> its definitly not confirmed yet though
[19:35] <phatmonkey> yeah
[19:35] <phatmonkey> sounds good though...
[19:35] <jcoxon> should be amazing
[19:35] <phatmonkey> yeah
[19:40] <phatmonkey> we could probably do free fall stuff in the uk if the parachutes were carefully tested
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[19:41] <phatmonkey> ah, found it
[19:43] <phatmonkey> http://www.tvnsp.org/modules.php?set_albumName=Aurora&op=modload&name=gallery&file=index&include=view_album.php
[19:43] <phatmonkey> http://www.tvnsp.org/modules.php?set_albumName=Aurora&id=ReadytoFly&op=modload&name=gallery&file=index&include=view_photo.php
[19:43] <phatmonkey> pretty ruddy cool if you ask me...
[19:44] <phatmonkey> I great opportunity for a video camera...
[19:44] <phatmonkey> Capsule fell at over 366 mph from 91,477 feet down to 73,217 feet. It continued to slow as the air density increased till chute deployment at 18,000 feet where it was down to 111 mph. Chute deployed and Capsule made a slow and normal descent to the ground.
[19:44] <phatmonkey> cripes
[19:45] <jcoxon> wow
[19:46] <malgar> hehe
[19:46] <phatmonkey> great fun :D
[19:47] <phatmonkey> wonder if we can beat that speed
[19:53] <jcoxon> hehe
[19:53] <jcoxon> one step at a time
[19:57] <phatmonkey> yep
[20:04] <malgar> who is in this channel that has already launched something?
[20:04] <malgar> :)
[20:04] <malgar> i'm the one with the lowest elevation i think... only 320 m with my minirocket :)
[20:05] <jcoxon> 66,000ft
[20:05] <malgar> lol
[20:19] <phatmonkey> about 10 feet with my throw-it-in-the-air-and-hope-for-the-best testing technique
[20:19] <phatmonkey> I haven't tried lobbing it out my bedroom window yet, that's advanced testing
[20:20] <phatmonkey> aah, the original glider's probably gone a few hundred feet
[20:20] <phatmonkey> shame we're probably not going to use it :/
[20:26] <malgar> jcoxon, i'm stitching
[20:26] <malgar> :)
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[00:00] --- Tue Jan 24 2006