highaltitude.log.20080319

[00:17] Laurenceb (i=Laurence@dhcp39-033.sthughs.ox.ac.uk) joined #highaltitude.
[00:17] <Laurenceb> hi all
[00:17] <Laurenceb> I just read the emails
[00:17] <Laurenceb> :(
[00:18] <fuzzylugnut> strife?
[00:19] <Laurenceb> looks like they want to introduce controlled airspace over cambridge
[00:19] <fuzzylugnut> is that where you fly through?
[00:19] <Laurenceb> yep
[00:19] <Laurenceb> for holding stacks
[00:21] <natrium42> RIP Arthur C. Clarke :(
[00:23] <Laurenceb> theres always wales I guess, but its a bit mountainous
[00:30] <fuzzylugnut> take snow samples off the top : )
[00:31] <edmoore> wales has some advnatgaes
[00:31] <edmoore> but getting there is a big disadvantage
[00:31] <edmoore> and it's still under all the transatlantic crap
[00:31] <edmoore> this would be a disaster for us, really
[00:31] <fuzzylugnut> when is it in affect?
[00:31] <Laurenceb> Cornwall
[00:31] <Laurenceb> ?
[00:32] <Laurenceb> a bit narrow
[00:32] <edmoore> it's not official yet
[00:33] <fuzzylugnut> ok
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[00:50] <fuzzylugnut> Laurenceb: you'd appreciate this...
[00:51] <fuzzylugnut> I bricked my atmega128 by choosing the wrong clock setting, so it was sitting there waiting for oscillator input instead of a crystal
[00:51] <fuzzylugnut> so I used a 10khz square wave from my speaker's head phone jack to clock it just enough to reset the right fuse bit.
[01:01] <akawaka> boring
[01:01] <akawaka> should have done it by hand
[01:01] <akawaka> with a morse keyer
[01:01] <fuzzylugnut> at at least 400hz? dun think so
[01:01] <akawaka> didn't realize there was a lower bound
[01:02] <akawaka> first time i started messing with cpus i was playing with a z80 and you could clock it as slow as you wanted:)
[01:05] <Laurenceb> interesting
[01:05] <Laurenceb> be careful with the fuse settings :P
[01:05] <fuzzylugnut> Yeah, gathered as much : 3
[01:09] <Laurenceb> I'm going to try out the mega324p, it looks good
[01:10] <fuzzylugnut> cool.
[01:10] <fuzzylugnut> is that the 32bit ones?
[01:11] <Laurenceb> no
[01:11] <Laurenceb> but its similar to the 168, only low power
[01:11] <fuzzylugnut> ah ok
[01:11] <Laurenceb> uses less current
[01:12] <Laurenceb> 2Kb ram, 32K flash
[01:13] <Laurenceb> I'd need a reflow oven to work with AVR32 properly
[01:14] <Laurenceb> it would be cool to make one.. I was thinking of thermopile based temperature control
[01:14] <Laurenceb> havent seen that done before
[01:14] <fuzzylugnut> I've seen it done with a little convection oven.
[01:14] <Laurenceb> the use a thermocouple in the designs I've seen
[01:15] <Laurenceb> a thermopile would theoretically be better
[01:16] <fuzzylugnut> for soldering smd stuff I use a hot air rework station
[01:16] <fuzzylugnut> so you could just do that too
[01:17] <Laurenceb> nah
[01:18] <Laurenceb> homebrew reflow oven is way cooler :P
[01:18] <fuzzylugnut> then go build one : P
[01:22] <akawaka> reflow oven?
[01:22] <akawaka> surface mount?
[01:25] <akawaka> awesome
[01:25] <akawaka> i was compiling the wrong elf for the last hour
[01:25] <akawaka> no wonder nothing was changing
[01:25] <Laurenceb> ha
[01:27] <akawaka> how is the transmitter going?
[01:27] <Laurenceb> well
[01:27] <Laurenceb> wasnt working on it today
[01:27] <Laurenceb> but I think it works fine
[01:27] <Laurenceb> its just my soundcard
[01:32] <akawaka> oh?
[01:32] <Laurenceb> sampling rate seems to be off by about 2%
[01:48] <Laurenceb> I strongly suspect its a problem with linux, but I cant get truetty running
[01:49] <Laurenceb> I'm not sure how to remove the old version... I wiped the registery enteries
[01:49] <Laurenceb> b ut its still giving me "epired"
[01:50] <Laurenceb> expired*
[01:52] <Laurenceb> interstingly if I'm playing music I was getting a problem under ubuntu with occasional glitches in the sound, whic could result from an incorrect sound card clock
[01:52] <Laurenceb> ie it runs ahead of or slow of the system clock
[01:55] <Laurenceb> I would be able to test it, but I dont have an audio source with < 1% error.... unless I flashed an avr to do it, which I might just try
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[02:30] <fuzzylugnut> woooo. got the flight computer all bolted together.
[02:31] <fuzzylugnut> it takes 580ma at 5V
[02:31] <fuzzylugnut> (with wifi and roboaudio boards)
[02:32] <fuzzylugnut> *takes pics and writes a spec page*
[02:47] <akawaka> gumstix?
[02:54] <fuzzylugnut> yep
[02:57] <fuzzylugnut> http://24.116.155.170/scrap/gumstix-stuff/fc/fc.html
[03:16] <fuzzylugnut> 'night!
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[11:41] <mc-> edmoore
[11:41] <mc-> got your PCBs
[11:41] <edmoore> oooooooooooooooooh
[11:42] <edmoore> hang on sorry, back in 10
[11:42] <edmoore> jusy loading up my car
[11:42] <edmoore> mum is here so can't stay and talk
[11:42] <edmoore> right, brb
[11:43] <mc-> email me an address, and I'll post today
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[15:54] <fuzzylugnut> worrrrd.
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[16:38] <fuzzylugnut> knock knock.
[16:40] <natrium42> who be thar?
[16:40] <fuzzylugnut> you're sterile.
[16:41] <natrium42> :(
[16:41] <fuzzylugnut> ... and thats as far as the joke goes.
[16:41] <fuzzylugnut> I'm in an area thick with mormons, so they appreciate that in a special way.
[16:41] <natrium42> lol
[16:44] <fuzzylugnut> btw... who is...."steve"
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[16:48] <mc-> edmoore, it's in the post
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[17:04] <fuzzylugnut> flowwolf..
[17:04] <fuzzylugnut> like
[17:04] <fuzzylugnut> aunt flo
[17:05] <fuzzylugnut> only canine.
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[18:12] <Laurenceb> hey ed
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[18:13] <edmoore> hey Laurenceb
[18:13] <edmoore> just read your report
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[18:13] <Laurenceb> ha
[18:13] <edmoore> nice work
[18:13] <edmoore> impressed :)
[18:13] <Laurenceb> that was a fairly old one, a few errors :P
[18:14] <Laurenceb> only two more days to go, then I'm finished :D
[18:14] <edmoore> cool
[18:14] <edmoore> well i'll happily proof-read or whatever if you want
[18:15] <edmoore> stil planning on launching this weekend?
[18:15] <Laurenceb> thats what my supervisor is for
[18:15] <Laurenceb> probably not
[18:15] <Laurenceb> I'm going home
[18:16] <edmoore> lol, no i mean for like a typo in a url or something - not claiming I could proof read the physics!
[18:16] <Laurenceb> thanx for offering
[18:16] <edmoore> eg, I noticed there was a space in the url to CUSF, where I presume there should be a ~ but latex got rid of it
[18:17] <Laurenceb> yes, it needs a few proof reads
[18:17] <edmoore> so it came out as blah.org/ cuspaceflight, rather than blah.org/~cuspaceflight
[18:17] <Laurenceb> I might uplooad a newer one this evening, need to rewrite a few bits first
[18:17] <Laurenceb> I've offered to come down later in the vacation to help organise a launch, but that would come outside the "project"
[18:18] <Laurenceb> ie I'd be working for the department so I could claim £6 an hour wage
[18:19] <Laurenceb> working for the physics dept is pretty cool :P
[18:20] <Laurenceb> was potting the HV supplies today
[18:22] <fuzzylugnut> mmmmm.....pot.
[18:24] <Laurenceb> http://wiki.ukhas.org.uk/projects:daughterboard_code
[18:24] <Laurenceb> not that sort of pot
[18:24] <Laurenceb> it ended up a bit messy :(
[18:25] <fuzzylugnut> *tries to smoke them anyway*
[18:25] <fuzzylugnut> oh that remind sme
[18:26] <fuzzylugnut> I need to dig up a little geiger tube.
[18:26] <fuzzylugnut> brb.
[18:26] <Laurenceb> and the viscosity got too high before I finished.... I tried making an injector using some bits of hose and a nitrogen cylinder but that was a *bad* idea
[18:27] <Laurenceb> blew potting compound all over my desk
[18:27] <Laurenceb> think the payload will need painting now
[18:29] <Laurenceb> oh well 2.5 out of 3 HV supplies are potted
[18:32] <Laurenceb> http://news.bbc.co.uk/1/hi/technology/7302508.stm
[18:38] <fuzzylugnut> storage room is locked : ( *waits for someone witha key*
[18:38] <fuzzylugnut> Laurenceb: take lots of pics!
[18:38] <Laurenceb> of what? my messy workspace :P
[18:40] <fuzzylugnut> yes : )
[18:40] <Laurenceb> ha back at college now
[18:41] <Laurenceb> the really odd thing is that the ioniser doesnt seem to be working
[18:42] <Laurenceb> my HV supplies still work, and the tronics is working, but its not ionising... if I stick a 1G ohm resistor across it, it gives a reading
[18:43] <Laurenceb> perhaps the solvents I used to clean it have left some sort of film on the electodes... you'd think that the dielectric strength wouldn't be enough to stop it working, but it seems its not that simple
[18:47] <Laurenceb> I've had the same problem before, its strange how a thin film of contamination can stop a 3Kv discharge
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[18:48] <Hiena> Good evening!
[18:48] <fuzzylugnut> Hiya
[18:49] <Laurenceb> hello
[18:51] <Hiena> How are you?
[18:52] <fuzzylugnut> really good : ) got the job I applied for. You?
[18:52] <Hiena> What kind of job?
[18:53] <fuzzylugnut> instrumentation specialist
[18:54] <Hiena> And, what kind of corporation? Some big name?
[18:54] <fuzzylugnut> mainly dealing with health physics instrumentation.
[18:54] <fuzzylugnut> for ORAU
[18:54] <fuzzylugnut> government run
[18:54] <Laurenceb> sounds similar to what I've been working on in an odd way :P
[18:55] <fuzzylugnut> your balloon stuff?
[18:55] <Hiena> Sounds like a stable job.
[18:55] <fuzzylugnut> Yeah, totally.
[18:55] <Laurenceb> sounds good :D
[18:56] <fuzzylugnut> and Laurenceb: if your dealing with radiation detection devices then yes, otherwise no.
[18:56] <Laurenceb> I just meant the sort of work
[18:57] <Laurenceb> is it servicing or more design/calibration?
[18:59] <Hiena> Well, seems like the things is speed up at the uni. They had some bucks for moving the Boeing simulator to the other room, and including a force feedback system, and at the same time they will go for bigger goverment fund for a "4 seat passenger aircraft with early pilot warning system".
[19:00] <fuzzylugnut> Laurenceb: servicing, calibration/ QA/QC, evaluation of new projects and everything involved with incorporating those new tools into the survey programs. One thing I'll be working on is the non-destructive-assessment of enriched uranium in pipes at a gaseous diffusion plant.
[19:00] <fuzzylugnut> Hiena: is that the sort of thing you deal with?
[19:01] <Laurenceb> nice :D
[19:02] <fuzzylugnut> thanks.
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[19:04] <Hiena> fuzzylugnut, nope. But until it has relation with the flying and paying for it, i can't say no. ;)
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[19:05] <fuzzylugnut> ahhhh, ok : )
[19:05] <Hiena> The horizont fider and the wigwrap measurement software is univerisity project too, but it will be on the panel of the AAIA2008 conference.
[19:06] <fuzzylugnut> who funds all that?
[19:06] <Hiena> Nobody. The Airbus was one of the interested parties, but they backed out.
[19:07] <fuzzylugnut> ahh, ok
[19:07] <fuzzylugnut> pussies.
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[19:09] <Hiena> Nah, it's a long and boring story. My interest is a high altitude UL, but i had to gather many "heads" as possible. I'm working for the guys at the uni, but they will do the calculations, or they will never see the source of the horizont finder.
[19:10] <fuzzylugnut> cool : )
[19:27] <Hiena> Nope. Because, i'm doing 6 different thing at the same time. Raising money for the projects, helping the guys at the university, doing the daily job (which is not related with the flying), salvageing parts for the UL, etc. All of that eats my days, and i'm running 4 hours sleeps.
[19:27] <fuzzylugnut> oh, bumme rthen
[19:28] <fuzzylugnut> well... I guess doing that for a little bit would be a good experience
[19:28] <fuzzylugnut> but I don't think that would be fun for too long.
[19:30] <Hiena> I'm doing that 3 years long.
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[19:30] <fuzzylugnut> hah, that sucks
[19:31] <fuzzylugnut> I'd hope you're getting alot out of it
[19:40] <fuzzylugnut> work much with inertial navigation?
[19:49] <Hiena> Nope. The sensors too expensive.
[19:49] <fuzzylugnut> ok
[19:49] <Hiena> I'm using mostly GPS and magneto sensors.
[19:50] <fuzzylugnut> ahh, ok
[19:50] <fuzzylugnut> no laser ring accelerometerS? : 3
[19:52] <Hiena> I had some MEMS accelerometer from the ST, but i had no time to play them. I'm waiting for the free SPI<->RS232 converter samples from the MAXIM.
[19:53] <fuzzylugnut> very nice.
[19:53] <Hiena> After that i'll interface the accelerometers to the uC board, and fly it.
[19:54] <fuzzylugnut> I'd be interested to hear about your results, when you get them
[19:56] <fuzzylugnut> alrighty, I have to split for a while, have a good day/night/whatever : )
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[21:57] <fuzzylugnut> rb.
[21:57] <fuzzylugnut> are you......steve?
[21:57] <fuzzylugnut> I forget who was who : )
[21:57] <fuzzylugnut> *is
[21:58] <RocketBoy> yep
[21:58] <fuzzylugnut> haha. ok.
[21:59] <fuzzylugnut> I'd expect that the batteries will arrive next week some time.
[22:00] <RocketBoy> OK - excellent I'll look out for them
[22:03] <fuzzylugnut> I'll be hiking in the deserts of southern utah then, so if you email me I won't be around
[22:03] <RocketBoy> OK
[22:04] <RocketBoy> What will U be doing in the desert?
[22:04] <fuzzylugnut> walking alot
[22:04] <fuzzylugnut> in arches national park
[22:04] <fuzzylugnut> I'm planning to go backcountry for a week
[22:05] <fuzzylugnut> http://24.116.155.170/road_trip/arches/arches.html
[22:06] <fuzzylugnut> thats when I went with my friend last summer
[22:06] <fuzzylugnut> http://24.116.155.170/arches/arches.html
[22:06] <fuzzylugnut> thats whenI went myself for a couple days, last may
[22:07] <RocketBoy> say thats way cool
[22:08] <fuzzylugnut> thanks.
[22:08] <fuzzylugnut> I really love the desert.
[22:09] <fuzzylugnut> especially in the spring, everything is a live for a change.
[22:11] <RocketBoy> I might be going to black rock later in the year - for a rocketry launch
[22:11] <fuzzylugnut> awesome : )
[22:11] <fuzzylugnut> do you have a LEUP?
[22:12] <RocketBoy> - is that an US explosives licence
[22:12] <RocketBoy> ?
[22:12] <fuzzylugnut> yeah
[22:13] <RocketBoy> yes I have the UK equivelnt
[22:13] <fuzzylugnut> cool, and thats transferable?
[22:13] <RocketBoy> I don't know - I doubt it - but the guys I might be going with have all that sort of stuff sorted
[22:14] <fuzzylugnut> ah ok
[22:14] <fuzzylugnut> so they got you covered.
[22:15] <RocketBoy> yep
[22:15] <fuzzylugnut> how high does your stuff go?
[22:16] <RocketBoy> well the one I'll be taking should do 30,000ft
[22:16] <fuzzylugnut> Cool
[22:16] <fuzzylugnut> that's quite some height.
[22:16] <fuzzylugnut> send up a gumstix!
[22:16] <fuzzylugnut> and be able to ssh into your rocket : )
[22:17] <fuzzylugnut> ; P
[22:17] <RocketBoy> only for a little while
[22:17] <fuzzylugnut> what size engine do you use?
[22:18] <RocketBoy> that will be an M - if you know that - about 3ft long and 3" dia
[22:18] <fuzzylugnut> HAHHA
[22:18] <fuzzylugnut> yeah
[22:19] <fuzzylugnut> if you asked the guys here real nice they'd give you an F at most : )
[22:19] <fuzzylugnut> what propellant composition?
[22:20] <RocketBoy> Amonium Perchlorate + aluminium
[22:20] <fuzzylugnut> hahah! awesome : )
[22:20] <RocketBoy> (like the SRBs on the shuttle)
[22:21] <fuzzylugnut> vry cool man
[22:21] <RocketBoy> anyway - its just a plan at the moment
[22:21] <fuzzylugnut> when would you be doing this?
[22:22] <RocketBoy> september
[22:22] <fuzzylugnut> ah, ok
[22:22] <fuzzylugnut> I want to go to one of these so bad : (
[22:22] <RocketBoy> I'll get the details
[22:24] <fuzzylugnut> thanks
[22:24] <RocketBoy> http://www.balls17.com/
[22:24] <fuzzylugnut> haha......
[22:26] <fuzzylugnut> "You will never get all the dust out of your car. Ever."
[22:27] <fuzzylugnut> I used to launch rockets when I was younger, but it was too expensive to keep going with it.
[22:28] <RocketBoy> Yeah - thats what it says - well it won't be my car - I'm told it takes about a day of work to get a hire car back to a near normal state
[22:29] <fuzzylugnut> ahhaa..
[22:29] <fuzzylugnut> do you get your rocket engine here or bring it from the uk?
[22:30] <RocketBoy> Just the hardware - not the propellant - I can get that there (so they say)
[22:30] <fuzzylugnut> ok
[22:30] <fuzzylugnut> there's a place in town here that sells all that stuff
[22:31] <fuzzylugnut> firefox-fx
[22:32] <fuzzylugnut> do you send up cameras inside your rocket?
[22:32] <RocketBoy> say they have a website - interesting
[22:33] <RocketBoy> yep
[22:34] <fuzzylugnut> cool.
[22:34] <fuzzylugnut> the guy runs it out of his garage : P
[22:35] <RocketBoy> It seems that getting pyrotechnic stuff in the US is a great deal easier than it is here
[22:36] <fuzzylugnut> Yeah
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[22:37] <fuzzylugnut> at the sportsmans store here, there are 2 isles dedicated to smokless powder
[22:37] <RocketBoy> wow
[22:38] <fuzzylugnut> Im assuming that;s not the case in the uk
[22:39] <RocketBoy> Actually smokless powder (nitro cellulose based stuff) is licence exempt over here - they are much more concerned about black powder
[22:39] <fuzzylugnut> interesting
[22:39] <RocketBoy> but finding somewher that sells it is more difficult
[22:40] <fuzzylugnut> ahh
[22:40] <Akadecca> could you launch a rocket from a balloon and put it into orbit?
[22:41] <Akadecca> well, of course you could
[22:41] <Akadecca> but i mean, would it be practical as an amateur
[22:41] <edmoore> Akadecca: yes in theory, but the energy savings you get by launching from a balloon are trivial in comparison in the total energy you ened to get to orbit, but great complexity is added by having to launch from a balloon
[22:41] <RocketBoy> thats where I started getting interested in this balllon stuff
[22:42] <edmoore> so only for masochists with money, really :)
[22:42] <fuzzylugnut> haha.
[22:42] <RocketBoy> getting it into space yes - into orbit no
[22:42] <edmoore> it is definitely worth it to do a parabolic suborbital to 100+ km
[22:42] <RocketBoy> I think it needs about 10x the energy to get into orbit
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[22:44] <fuzzylugnut> oh man
[22:44] <fuzzylugnut> I wish I could put up a sattelite.
[22:44] <fuzzylugnut> our group is putting in for a cubesat grant. I hope it goes through.
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[22:45] <edmoore> it's really annoying but, unless your name is Jean-Paul, there are really is no escaping the fact that getting into orbit is a function of putting loads of energy into your lump, and that a rocket is the best way to do that, and it's just a question of size
[22:46] <Akadecca> hmmm
[22:46] <Akadecca> thats...
[22:46] <Akadecca> thats...what she said?
[22:46] <edmoore> I could have phrased that all more carefully, yes
[22:46] <fuzzylugnut> heeee.....
[22:47] <Akadecca> a lesson for another time i'm sure
[22:47] <Akadecca> so i'm worried the sound card in this fitpc is just shit
[22:47] <fuzzylugnut> ack
[22:47] <Akadecca> can't get it to decode afsk
[22:47] <Akadecca> but my laptop does it fine, with the same software
[22:48] <Akadecca> i hope its not that the cpu is too slow
[22:48] <fuzzylugnut> do you have your capture settings right?
[22:49] <Akadecca> tough to tell when i only have the console to work with
[22:49] <fuzzylugnut> alsamixer
[22:49] <Akadecca> yeah, its capturing data
[22:49] <Akadecca> and the levels are within reason
[22:49] <fuzzylugnut> captureing data?
[22:50] <Akadecca> its reading audio signals
[22:50] <Akadecca> just not finding a dcd
[22:50] <fuzzylugnut> dcd?
[22:50] <RocketBoy> BBL
[22:51] <Akadecca> data carrier detect i guess
[22:52] <fuzzylugnut> what I'm saying is when I set up soundmodem, I have to go into alsamixer and tell it to capture from the line-in channel
[22:52] <fuzzylugnut> or soundmodem won't listen to the sound card
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[22:53] <edmoore> RocketBoy: on your return we should talk about hydrogen
[22:53] <fuzzylugnut> :d
[22:53] Last message repeated 1 time(s).
[22:53] <fuzzylugnut> h2 ftw.
[22:54] <edmoore> it's disarmingly cheap
[22:54] <fuzzylugnut> thats why I use it
[22:54] <fuzzylugnut> 38$ for 200cubic ft
[22:54] <Akadecca> fuzzylugnut: yeah, its capturing, hooking the output right into the input and i can echo packets to myself
[22:55] <fuzzylugnut> Akadecca: ahhh, ok, gotcha.
[22:55] <Akadecca> just not sure
[22:57] <Akadecca> if i have a wav file of audio data, is there any software i can hook it up to that will decode afsk for me?
[22:58] <fuzzylugnut> soundmodem should
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[23:00] <fuzzylugnut> or do you mean read the file and spit out the packet...
[23:09] <fuzzylugnut> http://picasaweb.google.com/ssdevlab/BioLaunchB08AB8March2008
[23:13] <fuzzylugnut> has anyone setup a gyro stabilizer for their cameras?
[23:18] <edmoore> fuzzylugnut: toyed with some things
[23:18] <fuzzylugnut> oh cool
[23:18] <edmoore> but gyro stabilised as in gyro-based inertial measurement then servo stabilised
[23:18] <edmoore> I'm working on an inertial measurement unit at the moment
[23:18] <fuzzylugnut> thats what I was thinking, a big flywheel would get kinda heavy : )(
[23:18] <edmoore> yeah
[23:18] <Akadecca> gyro stabilized telescope
[23:19] <fuzzylugnut> THat's be killer : )
[23:19] <edmoore> well IMUs are kind of a whole nuther subject and it's been a bit of a learning curve
[23:19] <fuzzylugnut> ahh ok
[23:19] <Akadecca> i believe they do some astronomy with some of the balloons in antartrica
[23:19] <edmoore> Extended Kalman Filters and other forms of devilry and witchcraft
[23:19] <edmoore> yes, BLAST - an amazing project
[23:20] <fuzzylugnut> blast... the math libraties?
[23:20] <fuzzylugnut> *libraries
[23:20] <edmoore> the antarctic balloon telescope
[23:20] <fuzzylugnut> oh
[23:21] <edmoore> close
[23:22] <natrium42> fuzzylugnut, you haven't watched the documentary about BLAST?
[23:22] <fuzzylugnut> nope
[23:22] <natrium42> it's well worth watching
[23:22] <natrium42> i believe somebody here had it
[23:22] <edmoore> seconded, very firmly
[23:22] <natrium42> edmoore maybe?
[23:22] <fuzzylugnut> not on youtube?
[23:22] <edmoore> it is a GREAT documentary
[23:22] <edmoore> yes, I do
[23:22] <edmoore> as does james
[23:22] <natrium42> i remember leeching from somebody
[23:23] <natrium42> :)
[23:23] <edmoore> it's on my external hdd, but next time I'm plugged in we can set up a tranfer and leave it ticking for a few hours
[23:23] <fuzzylugnut> ok thanks
[23:23] <edmoore> I lie, I have it on my laptop hdd
[23:25] <edmoore> do you want me to send it over irc?
[23:25] <edmoore> it'll take forever but i don't mind leaving laptop on overnight
[23:26] <fuzzylugnut> Yeha, go ahead
[23:26] <fuzzylugnut> -if- it works.
[23:26] <edmoore> well, if you have a popup box now then accept
[23:26] <RocketBoy> Im back for a short while - ed - hydrogen!
[23:27] <fuzzylugnut> I did : P I'm behind a router though
[23:27] <edmoore> I like
[23:27] <edmoore> james isn't so keen
[23:27] <RocketBoy> its good for another 3 - 4,000ft
[23:27] <edmoore> but then he's not keen on pyros
[23:27] <fuzzylugnut> I can offer advise if you gous need it.
[23:27] <edmoore> does it diffuse at any significantly different rate?
[23:27] <fuzzylugnut> *guys.
[23:27] <RocketBoy> yep - I guess pyro-cutdown and hydrogen is a bit risky
[23:28] <Akadecca> boring
[23:28] <fuzzylugnut> we keep 20ft between our pyro cutdown and balloon.
[23:28] <edmoore> not if there's lots of string in between
[23:28] <RocketBoy> I don't know - I guess hydrogen would be similar
[23:29] <fuzzylugnut> we also drive a 2ft copper bar in as a grounding rod while we fill. everything is grounded, including us.
[23:29] <edmoore> that's a good point
[23:29] <edmoore> flash jackets are pretty fetching too
[23:29] <RocketBoy> personally I'm not worried about static -
[23:30] <fuzzylugnut> yeah, you should be
[23:30] <RocketBoy> I have some nomex cloth somewhere
[23:30] <fuzzylugnut> our guys wear nomex suits
[23:30] <fuzzylugnut> just for the flash protection
[23:31] <fuzzylugnut> h2 has a huuuuuge flammability band and a very very low ignition threshold.
[23:31] <RocketBoy> well its worth thinking about
[23:31] <edmoore> but yeah, it'd be fun to get some h2 experience
[23:31] <fuzzylugnut> lots of people have used it, you just have to be smart and safe about it
[23:31] <edmoore> how much would you have to pay for 5 cu m?
[23:31] <edmoore> of helium*
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[23:32] <RocketBoy> of He - about £100
[23:32] <edmoore> fuzzylugnut informs me he got that for $40
[23:32] <fuzzylugnut> of h2, 30$
[23:32] <edmoore> £20
[23:32] <RocketBoy> H should be a fair bit cheaper
[23:32] <mc-> RocketBoy, have you been to Balls before, it's well worth going, I went with mars a few yrs ago
[23:33] <RocketBoy> nope it will be my 1st time
[23:33] <fuzzylugnut> RocketBoy: a 190cubic foot K size tank goes for ~38 bucks here.
[23:33] <mc-> it's a long flight though
[23:34] <RocketBoy> thats about 19cu m
[23:34] <Laurenceb> hi all
[23:34] <fuzzylugnut> Hi
[23:34] <Laurenceb> Akadecca: your trying to decode afsk?
[23:34] <Akadecca> yeah
[23:34] <Laurenceb> and cant?
[23:35] <edmoore> RocketBoy: I thought it was roughly divide by 30?
[23:35] <Laurenceb> what system/application?
[23:35] <edmoore> to get from cu ft to cu m
[23:35] <Laurenceb> google is your friend edmoore
[23:35] <Akadecca> Laurenceb: looking for a windows app that i can drop a wave file into and decode
[23:35] <Laurenceb> hmm RTTY?
[23:35] <edmoore> 3andabit ft in a meter, so 3andabit^3 = about 30
[23:35] <edmoore> cu ft in a cu m
[23:36] <Akadecca> 1200baud packet
[23:36] <Laurenceb> 35
[23:36] <edmoore> = about 30
[23:36] <edmoore> quiet, physicist
[23:36] <Laurenceb> ah ok.... I wouldnt know about packet
[23:36] <fuzzylugnut> edmoore: my advise is if you're going to use H2, get informed, set up a safety plan, ground your setup, and wear flash protection. Even cotton clothing will work.
[23:36] <Laurenceb> maybe you have a soundcard sampling rate problem
[23:37] <edmoore> I saw them burst one on tv a few months ago
[23:37] <edmoore> was suprisingly unexciting
[23:37] <edmoore> just a bit of a whumpff
[23:37] <fuzzylugnut> when its purely h2, its not too bad
[23:37] <fuzzylugnut> the h2+o2 mix is really bad.
[23:37] <edmoore> did i send you that youtube vid?
[23:37] <fuzzylugnut> the big shiny exploding pillow?
[23:38] <Laurenceb> yes, I've tried a h2 wheely bin liner
[23:38] <edmoore> that's the one
[23:38] <Laurenceb> not so bad
[23:38] <RocketBoy> oops - yep 3.28 x 3.28 x 3.28 = 35 - so 190cu ft = 5cu m
[23:39] <fuzzylugnut> people just get edgy about things they don't understand. Learn about it and get informed and you'll be ok
[23:39] <fuzzylugnut> and no smoking ; )
[23:39] <edmoore> James's hesitance was based on what 'the internet' would say to it if it was featured on make of digg or something
[23:39] <edmoore> rather than any real safety implications
[23:39] <fuzzylugnut> :P
[23:39] <fuzzylugnut> lame.
[23:42] <RocketBoy> night guys
[23:42] <fuzzylugnut> 'night
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[23:47] <edmoore> mc - thanks for posting
[23:47] <edmoore> oh bum, missed him
[23:49] Nick change: Akadecca -> akawaka
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[23:54] <fuzzylugnut> brb.... feeling a powerful lust for cheese.
[23:54] <edmoore> i know the kind
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[23:57] Action: Laurenceb wonders if that was an analogy
[00:00] --- Thu Mar 20 2008