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[00:15] <Laurenceb> hi edmoore
[00:15] <edmoore> hi
[00:15] <edmoore> am actually about to get this sleep i've been meaning to get for the last couple of days
[00:16] <edmoore> just doing some last minute admin
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[00:23] <Laurenceb> http://www.youtube.com/watch?v=KBMU6l6GsdM
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[00:59] <Laurenceb> http://www.maplin.co.uk/Module.aspx?ModuleNo=224515#Faq
[00:59] <Laurenceb> quite cheap
[00:59] <Laurenceb> wonder if you could modify it to be autonamous
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[10:21] <jcoxon> morning
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[14:46] <edmoore> mronign all
[14:47] <edmoore> received signal = transmitted signal + noise
[14:47] <edmoore> mronign = morning + hangover
[14:56] <shellevil> morning
[14:56] <shellevil> well - afternoon now
[15:02] <jcoxon> afternoon
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[16:26] <Hiena> Ugh... Anybody knows a good online klm viewer?
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[16:33] <Hiena> Groan...
[16:33] <Hiena> Googleearth just killed my X windows.
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[16:47] <rjharrison_> hi all
[16:47] <rjharrison_> BLOODY WINDY UP HERE
[16:47] <rjharrison_> opps
[16:49] <jcoxon> :-)
[16:49] <jcoxon> its quite calm down here
[16:49] <rjharrison_> Blowing a hooly up here :)
[16:50] <rjharrison_> We need some good weather it's so frustrting waiting for the wx
[16:51] <jcoxon> indeed
[16:54] Nick change: smea -> smealum_AWAY
[16:58] <rjharrison_> la la la ...---...---...---...---...--- I'm not bored ... Honnest . . . . . . . .
[16:58] <jcoxon> oh dear
[16:58] <jcoxon> can play radio if you want
[16:58] <jcoxon> in say 10mins
[16:59] <rjharrison_> Hum I need to set up a long wire really
[16:59] <rjharrison_> A high one
[16:59] <jcoxon> throw it over a tree
[16:59] <rjharrison_> I would go and do that if the wind wasn't so strong
[17:00] <Hiena> Well. I'm off to assembly the second radiomodem.
[17:00] <jcoxon> rjharrison_, well the offer stands if you want
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[17:07] <Xenion> Hallo :-=
[17:07] <jcoxon> hey Xenion
[17:07] <Xenion> hi :-)
[17:08] <jcoxon> hows the balloon payload going?
[17:10] <Xenion> not so well
[17:10] <Xenion> but it's not bad as it sounds :)
[17:10] <Xenion> it's just a lot of stress @ work combined with a lot to do
[17:10] <Xenion> :-)
[17:10] <jcoxon> yeah, know what you mean
[17:10] <Xenion> ther's progress but more slowly then expected
[17:11] <jcoxon> cool
[17:12] <Xenion> and for you ?
[17:12] <jcoxon> well i'm working on our trans-atlantic payload
[17:12] <jcoxon> i'm playing with the ballast system
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[18:43] <hallam> hey all
[18:44] <hallam> anything new?
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[18:46] <Laurenceb> hello
[18:47] Action: Laurenceb has been outside testing
[18:47] <Laurenceb> lassen iq is annoying
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[18:47] <Laurenceb> it took 15 minutes to get some sats, then decided it wasnt going to get a position fix
[18:48] <Laurenceb> never run it inside
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[18:51] <jcoxon> Laurenceb, you have a constant war with gps modules i'm convinced
[18:51] <jcoxon> its a little bit like your ram
[18:51] <jcoxon> always an issue
[18:51] <jcoxon> :-p
[18:51] <Laurenceb> hehe
[18:54] Action: jcoxon swears by ublox modules
[18:54] <Laurenceb> yeah maybe worth a try
[18:54] <Laurenceb> ublox5 works at altitude right?
[18:55] <Laurenceb> hehe look at sparkfun front page
[18:55] <jcoxon> yup
[18:55] <jcoxon> yeah, Meoteotek's mission
[18:56] <jcoxon> such a nice looking payload
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[18:56] <Laurenceb> "Do alkaline batts hold up better under cold temperatures than LiPos?" <- *sigh*
[18:56] <jcoxon> Laurenceb, i've only used ublox4 which works
[18:56] <Laurenceb> right
[18:56] <jcoxon> i'm sure ublox5's would as well
[18:56] <Laurenceb> "Can we even do this in paranoid America?" they really need to do some research
[18:57] <jcoxon> :-) consdiering they started it
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[18:58] <akawaka> http://www.digi.com/products/wireless/point-multipoint/xbee-pro-xsc.jsp
[18:59] <akawaka> meoteoteks payload does look nice
[18:59] <jcoxon> really smart pcbs
[19:00] <Laurenceb> akawaka: yeah but we have to use 868
[19:00] <jcoxon> akawaka, is in the US :-p
[19:00] <Laurenceb> there are 868MHz zigbee modules, but the Ti C1100 based modules give slightly better performance
[19:00] <Laurenceb> 900 is ok in the us
[19:01] <jcoxon> scratch the "," in that last sentence
[19:01] <Laurenceb> with a yagi on one end those zigbee modules would be perfect
[19:02] <Laurenceb> although there would be more of a risk of RFI
[19:05] <Laurenceb> http://www.srcf.ucam.org/~cuspaceflight/Martlet0/rocket%20loading.jpg
[19:05] <Laurenceb> nice pic
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[19:13] <akawaka> weird
[19:13] <natrium42> word
[19:14] <Laurenceb> world
[19:14] <akawaka> did a flight predicition from where i live right now and the predicition said the balloon would land in a park called Galway Downs, southeast of LA
[19:14] <akawaka> and Galway is where i am from in ireland
[19:14] <akawaka> it must be a sign!
[19:14] <natrium42> haha
[19:14] <natrium42> when are you launching?
[19:15] <akawaka> no plans yet
[19:15] <akawaka> just toying with the idea
[19:15] <akawaka> seeing if i could launch from my house rather than driving 200 miles to launch
[19:22] <natrium42> somebody better launch soon
[19:24] <akawaka> /join #regularaltitude
[19:26] <natrium42> srsly
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[19:38] <Laurenceb> that ublox5 with the helix ant on sparkfun looks good
[19:39] <Laurenceb> 4hz as well :D
[19:51] <akawaka> the GS406?
[19:54] <Laurenceb> yeah
[19:55] <Laurenceb> hmm mini parafoil with GS406, C1100 radio module, and mlx90609 gyro
[19:55] <Laurenceb> that would be perfect
[19:56] <Laurenceb> thing is it wouldnt really need to be autonomous
[19:57] <Laurenceb> you could just as easily fly it from the ground
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[20:11] <Laurenceb> hi hallam
[20:11] <Laurenceb> whats new?
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[20:14] <Laurenceb> hallam: your right about lassen iq vs ublox - took me about an hours work to get my lassen working properly, it was full of corrupted ephemeris or something
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[22:13] <rjharrison_> I want to launch but uk has shit wzx
[22:14] <rjharrison_> I want to launch but uk has shit wx
[22:14] <Laurenceb> well I'm ready as well
[22:14] <Laurenceb> want to do a joint launch?
[22:14] <rjharrison_> Not really but on the same day would be cool
[22:14] <Laurenceb> I'm on 434.075MHz tho
[22:14] <rjharrison_> rx and tx
[22:14] <Laurenceb> ok
[22:14] <rjharrison_> me 2
[22:14] <Laurenceb> oooh you have relay?
[22:15] <Laurenceb> *repeater
[22:15] <rjharrison_> nar just recording up link on mpo3
[22:15] <rjharrison_> nar just recording up link on mp3
[22:15] <Laurenceb> ok
[22:15] <Laurenceb> any idea wheres the best place to buy ram?
[22:21] <rjharrison_> wx in uk is crap
[22:22] <Laurenceb> whats wx?
[22:28] <Laurenceb> you mean weather?
[22:30] <Laurenceb> rjharrison_: what are you using as the receiver?
[22:32] <natrium42> his EARS
[22:33] <Laurenceb> lol
[22:40] <shellevil> Laurenceb: ebuyer?
[22:41] <Laurenceb> too late
[22:41] <Laurenceb> used ebay
[22:50] <Laurenceb> hmm ebuyer delivery is pricey
[22:50] <Laurenceb> ebay was cheaper :P
[22:51] <shellevil> ebuyer may be free
[22:55] <Laurenceb> oh well
[22:55] <Laurenceb> I wasted £1 then
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[23:02] <jcoxon> hey all
[23:02] <natrium42> hi jcoxon
[23:02] <jcoxon> hey natrium42
[23:03] <jcoxon> you free for a 'meeting' tomorrow?
[23:04] <Laurenceb> how are the valves working?
[23:05] <jcoxon> Laurenceb, as in?
[23:05] <jcoxon> they work well - do the job fine (though i haven't tested with denatured alcohol yet
[23:05] <Laurenceb> well do they work ok? do you have good flow rate
[23:05] <jcoxon> )
[23:06] <Laurenceb> cool
[23:06] <jcoxon> yeah the flow rate is reasonable with additional pressure
[23:06] <Laurenceb> how much head?
[23:06] <jcoxon> if we have a little bit of air in the tank at launch then that'll help as well
[23:06] <jcoxon> 5cm
[23:06] <Laurenceb> ok
[23:07] <jcoxon> sorry 5cm from the bottom of the tank to the valve
[23:07] <Laurenceb> you can get about 50cm of head on the bottom
[23:07] <Laurenceb> if you see what I mean
[23:07] <Laurenceb> 50cm trailing pipe
[23:07] <jcoxon> it'll be fine
[23:07] <jcoxon> just need to get some slightly thinner tubing
[23:07] <Laurenceb> then it will be vented with air through the normally open port
[23:07] <jcoxon> as the common port and NC are adjacent
[23:08] <Laurenceb> ok
[23:08] <Laurenceb> also we could put in some electrodes
[23:08] <Laurenceb> maybe brass tube
[23:08] <Laurenceb> then we can monitor the flow
[23:08] <Laurenceb> theres a design for the on the wiki
[23:08] <Laurenceb> on the aldist page
[23:09] <jcoxon> hows the sensor
[23:09] <Laurenceb> been working on the rogallo sorry
[23:09] <Laurenceb> I need to rig up an avr so I can play with the I2C timing
[23:10] <jcoxon> okay
[23:10] <Laurenceb> I'll try and fit in in tomorrow
[23:10] <jcoxon> cool
[23:10] <jcoxon> will you be on tomorrow evening?
[23:10] <Laurenceb> should be
[23:10] <jcoxon> cool
[23:11] <Laurenceb> whats the rough flow rate you're getting?
[23:12] <jcoxon> 0.6ml per sec
[23:12] <jcoxon> with water
[23:13] <Laurenceb> ok thATS ACEPTABLE
[23:13] <Laurenceb> what are you using as a tank?
[23:13] <jcoxon> at the mo just a 2L coke bottle with the tubing coming out hte bottom
[23:14] <Laurenceb> ok
[23:14] <jcoxon> still working on the actual tank itself
[23:14] <Laurenceb> 5L may work
[23:14] <jcoxon> yeah i think thats best
[23:14] <Laurenceb> not sure how to attatch to the bottom
[23:14] <Laurenceb> ideally a gasket arrangement
[23:14] <jcoxon> but might as well get natrium to get it as there is no use sending an empty bottle to canada
[23:15] <Laurenceb> yeah but we could make the plumbing
[23:15] <Laurenceb> hmm really need a lathe
[23:15] <Laurenceb> then machine some M3 or M4 threaded bar
[23:16] <Laurenceb> G8KHW: do you have a lathe?
[23:17] <G8KHW> yeah
[23:17] <Laurenceb> jcoxon: whats the internl diameter of your tube?
[23:18] <jcoxon> 1/16" so 1.6mm
[23:18] <Laurenceb> if we had about 30mm of M3 or M4 threaded bar, then took off 10mm of thread from one end
[23:18] <Laurenceb> and drilled a 1.5mm hole down the middle
[23:18] <Laurenceb> hmm prob M4 would be easiest
[23:19] <Laurenceb> will it stretch over 2mm?
[23:19] <jcoxon> prob not
[23:19] <Laurenceb> hmm
[23:20] <Laurenceb> I dont know
[23:20] <Laurenceb> maybe it could be more complex
[23:20] <jcoxon> actually it might
[23:20] <Laurenceb> say 1.5mm hole from one end
[23:20] <Laurenceb> then taken down to 2mm overall diameter for 5mm starting from the other end
[23:20] <Laurenceb> ok
[23:21] <Laurenceb> anyway its not too hard to make
[23:21] <Laurenceb> then we could have a nice strong fixing into the bottle top
[23:22] <Laurenceb> seal it with washers and ptfe tape
[23:23] <G8KHW> what material is tube?
[23:23] <jcoxon> silicone
[23:24] <G8KHW> silicon rubber?
[23:24] <jcoxon> yeah
[23:25] <jcoxon> well i think so at least
[23:26] <jcoxon> yeah it is
[23:26] <G8KHW> so U want somthing that will mate with the tube and can be screwed into a coke bottle?
[23:27] <jcoxon> that would be the best idea
[23:27] <jcoxon> however its going to need to be about a 5L bottle
[23:28] <jcoxon> either the lid and have it upside down or the bottom somehow
[23:29] <G8KHW> same lid as the 2L bottles
[23:29] <jcoxon> okay
[23:29] <jcoxon> then that would be best methinks
[23:30] <jcoxon> have it attached to the lid and the bottle goes upside down
[23:30] <jcoxon> makes it easy to ship off to natrium
[23:30] Nick change: smealum_AWAY -> smealum
[23:32] <Laurenceb> well not screwed in
[23:32] <Laurenceb> use nuts and rubber washers
[23:33] <G8KHW> I'll see what I can machine up - a short section of tube would help
[23:33] <jcoxon> i'll stick it in the post monday
[23:33] <jcoxon> that said i'm looking for some stuff with a thinner wall
[23:38] <jcoxon> right, night all
[23:38] <G8KHW> night
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[23:42] <G8KHW> night
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[23:46] Action: Laurenceb is bored
[23:46] Action: Laurenceb cant be bothered to work on the level sensor
[00:00] --- Sun Mar 15 2009