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[14:37] Laurenceb (n=laurence@fwnat-pub-1.physics.ox.ac.uk) joined #highaltitude.
[14:37] <Laurenceb> hi all
[14:37] Action: Laurenceb has sent off his application for a studentship at surrey satellite technology
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[16:08] <Simon-MPFH> Good luck Laurence
[16:08] <Simon-MPFH> Kinda wish I was doing something like that
[16:08] <Laurenceb> thanx
[16:08] <Laurenceb> wow the ioniser chamber is finally complete :D
[16:08] <Simon-MPFH> IWOOT
[16:09] <Simon-MPFH> Is that like a microwave oven?
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[16:50] <Laurenceb> hi
[16:58] <jcoxon> hey Laurenceb
[16:59] <Laurenceb> photos in 5
[17:02] <Laurenceb> http://wiki.ukhas.org.uk/projects:aerosol
[17:08] <Laurenceb> ok all up
[17:13] <Laurenceb> the airflow goes throught that tube
[17:14] <Laurenceb> there a piston on the entrance to close it off when we have a sample
[17:14] <Laurenceb> and scanning electron microscope targets screw into the top, and electrodes into the bottom
[17:16] <Laurenceb> took ages to make, a few parts were made in a cnc mill, the reset on a lathe, I did the design, assembly, and machines few of the smaller parts
[17:16] <Laurenceb> it could do with a bit more polishing
[17:35] <Laurenceb> gtg
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[18:04] <Hiena> Good evening!
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[18:09] <jcoxon> evening natrium42
[18:09] <Hiena> Hi natrium42 !
[18:09] <natrium42> hey
[18:09] <jcoxon> natrium42, might fly firefly this weekend :-)
[18:09] <Hiena> How things goes up?
[18:09] <natrium42> following the shuttle launch?
[18:09] <natrium42> jcoxon, oooh!
[18:09] <jcoxon> a couple of things to sort out
[18:10] <jcoxon> and slightly relies on rocketboy being available
[18:15] <natrium42> are the winds good?
[18:15] <jcoxon> yup
[18:15] <jcoxon> excellent
[18:15] <natrium42> and no snow unlike here? ;)
[18:15] <jcoxon> snow here? pah
[18:15] <jcoxon> we never have snow
[18:15] <natrium42> hehe, just rain, eh?
[18:15] <jcoxon> is actually quite mild right now
[18:16] <jcoxon> but yeah, rain
[18:16] <jcoxon> well not for the weekend though
[18:23] <Hiena> Hmm, anybody could says T time for the shuttle lunch?
[18:25] <jcoxon> 1940 - 1950 gmt
[18:25] <jcoxon> thats teh window
[18:28] <Hiena> I heard that. They just said that. That means i have T-120 to make a popcorn.
[18:28] <jcoxon> more then enough time :-D
[18:50] <icez> howdy jcoxon
[18:50] <icez> been a while :p
[19:05] <jcoxon> hey icez
[19:10] <Hiena> Groan...Damned ISP. They cut the stream again...
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[19:18] <jcoxon> hey edmoore
[19:18] <edmoore> yo
[19:19] <edmoore> probably
[19:19] <edmoore> still not sked ferg - he paid for it
[19:19] <jcoxon> okay
[19:23] <jcoxon> ooo shuttle launch soon
[19:38] <Hiena> I...will... kill...my ISP...
[19:39] <edmoore> ?
[19:40] <Hiena> Stream dropped.
[19:40] <Hiena> Also i'll add the Firefox developers to the list..
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[19:47] <jcoxon> sweet launch
[19:59] <Hiena> Jup. It was perfect.
[20:02] <edmoore> what's dpdt?
[20:02] <edmoore> dp/dt - some kind of pressure rate?
[20:06] <jcoxon> edmoore, from where?
[20:06] <jcoxon> change in pressure over time?
[20:06] <edmoore> nasa tv
[20:06] <edmoore> "dee pee dee tee" over the radio
[20:06] <edmoore> assuming it's dp/dt, but wasn't sure
[20:07] <jcoxon> oh right
[20:07] <jcoxon> not sure
[20:07] <Hiena> DPDT is a switch. I guess...
[20:08] <edmoore> it was used in the definite article
[20:08] <edmoore> not sure a lowly dpdty switch would warrant that
[20:08] <jcoxon> oh poo, just logged on to my vodafone account, there is ?8 on the firefly 1 sim card
[20:08] <jcoxon> guess i'm never going to get that back
[20:08] <edmoore> ?
[20:09] <jcoxon> as in the simcard which went into the sea
[20:09] <jcoxon> pay as you go
[20:09] <jcoxon> i forgot that there was money
[20:09] <Hiena> It is. The NASA has a history to using lowly pbdt switches...
[20:12] <Hiena> Well, movietime is off, time to start working and dowloading the drop test videos.
[20:35] <Hiena> Sigh, i thinks it will takes years until, my pals at the university will learn, how to make a correct, low cost experiment. They measures/records always only one or two parameters at once...
[20:36] <jcoxon> whats the experiment?
[20:37] <Hiena> Drop tests for an camera based flight control system.
[20:37] <jcoxon> oh right
[20:37] <jcoxon> what sort of altitude are you dropping from?
[20:39] <Hiena> The system will measure the forces "watching" the wing. Dunno, I guess about two or two and half meter. They used a ladder, but i guess they never measured the exact position.
[20:40] <jcoxon> oh okay
[20:42] <Hiena> I'm just the cable-guy on this project. I rather interested higher altitudes. For my stability and control tests i have to do drops from 30-60 meter at first. Later i want to make at least one drop over 5000, but it's almost impossible, due the regulations.
[20:44] <jcoxon> sorry Hiena, you might have told me before - what are you dropping
[20:47] <Hiena> Ok. Currently i'm working on a high altitude ultralight airplane. This is a long project, and i estimate the first flight around 2013. Now, i'm working on a 1/3 scale POF modell. And that will be droped.
[20:48] <jcoxon> right
[20:48] <jcoxon> where are you based?
[20:48] <Hiena> Khm...POC not POF...POF is a inbound joke in the uni.
[20:48] <Hiena> Hungary.
[20:48] <jcoxon> oh right
[20:49] <jcoxon> strict rules about UAVs?
[20:49] <Hiena> POC=Proof Of Concept POF= Proof Of Failure
[20:49] <jcoxon> hehe
[20:50] <Hiena> No. Strict rules about flying. If you mess over 3800meter, or in the TMA areas, you could win some jailtime.
[20:50] <jcoxon> hmmmmmm
[20:51] <jcoxon> in the UK the rules are basically you can do UAVs as long as they remain within the rules for R/C hobby aircraft
[20:51] <jcoxon> so within sight etc
[20:51] <jcoxon> however if you are dropping a glider if it has a parachute it'll fall under the payload rules for balloons
[20:53] <Hiena> Here, if your R/C planes goes over 50m, and cause an accident, you will be labeled as some criminal or even worse.
[20:55] <Hiena> Also, the most pilot don't cares about the R/C planes. I had several close calls with the crop dusters and the ambulance helicopters at the past.
[20:58] <jcoxon> oh dear
[21:01] <Hiena> Here, the airspace separated to several layer. 0-50m is the ground level, where you could fly with anything. 50-3800m or the TMA limit is the uncontrolled airspace, where you could fly almost any licenced airplane in VFR conditions, That could cause funny situation, like hang-glider flying formation with NATO BlackHaks, etc. Over 3800 - 9000m is the controlled airspace where you could fly with a strict limitations (transpoder, radio, etc.)
[21:03] <Hiena> Over 9000m is uncontrolled airspace again, because our brave army cannot do anything over this altitude, and mainly used by the military flyovers.
[21:10] <Hiena> Some years ago, i flown a 2.5ccm, delta winged ,combat modell. It was fast, maneuverable, unstable. Also, without any throttle control, because that time, i had only 2 channel radio. It was rated 80+ km/h modell. One day i practiced some low level turn, when an ambulance helicopter fly over, and crossed the land at 15 meter with the same course as my modell.
[21:17] <Hiena> I had to made a hard turn right, to avoid the collision, and push the plane to the lawnmover mode. The crop dusters made less problem because they usually flown a straight lines at the same altitude.
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[21:23] <natrium42> Hiena, wow, scary stuff
[21:26] <Hiena> Yup. That's the main reason, why i prefer the winter days for the modell flying. No crop duters, no ambulance copters.
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[21:27] <Hiena> Well, time to set my CG to the horizontal position.
[21:27] <Hiena> Good night all!
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[23:04] <jcoxon> hey RocketBoy
[23:05] <RocketBoy> hiya jcoxon
[23:06] <RocketBoy> looks like the tether stuff is on Saturday now.
[23:10] <jcoxon> oh okay
[23:10] <jcoxon> so sunday is good?
[23:10] <jcoxon> (hope it isn't too much!)
[23:11] <RocketBoy> Should be OK - but I need to OK it with the better 1/2
[23:12] <jcoxon> no problem
[23:12] <jcoxon> well firefly depends on ed having a gsm antenna
[23:12] <jcoxon> as i can't order one in time
[23:13] <jcoxon> (he should have one as they got a load of telit modules
[23:13] <RocketBoy> what - a cell phone antenna?
[23:14] <jcoxon> yeah
[23:14] <jcoxon> with a mmcx ending
[23:14] <RocketBoy> About 3" of wire will probably do - it works on one of my phones
[23:15] <RocketBoy> I'll check the length
[23:15] <jcoxon> oh right
[23:15] <jcoxon> i just don't have the right plug then
[23:16] <RocketBoy> (you would be better off with the right thing though)
[23:17] <RocketBoy> like the one on the right http://www.freebirdshop.de/shop/catalog/images/mmcx%20auf%20n-stekcer.jpg
[23:17] <RocketBoy> ?
[23:18] <jcoxon> yup
[23:19] <RocketBoy> just checking if I have one
[23:22] <RocketBoy> yep - with about 5" of co-ax attached - just right to convert to a little antenna
[23:22] <jcoxon> :-)
[23:23] <RocketBoy> well its a fallback anyway
[23:23] <jcoxon> excellent
[23:24] <jcoxon> thats my main worry
[23:24] <jcoxon> the payload is looking nice, very compact
[23:24] <jcoxon> and i've tested the radio
[23:25] <RocketBoy> spiffing
[23:25] <jcoxon> would be good to compare CWGet and cocoamodem
[23:25] <jcoxon> perhaps run them seperately and see which decodes trhe most
[23:25] <RocketBoy> I'll bring my PC
[23:25] <jcoxon> i'll bring my mac
[23:27] <natrium42> jcoxon, any pictures? :)
[23:27] <jcoxon> i will in a bit
[23:28] <jcoxon> am on xbox right now
[23:28] <jcoxon> not doing to well chatting at the same time :-D
[23:29] <jcoxon> its perhaps a little too comapct
[23:32] <natrium42> haha
[23:32] <natrium42> alright
[23:32] <natrium42> nah, it can never be too compact :)
[23:32] <jcoxon> this is tight
[23:32] <jcoxon> there isn't a camera
[23:33] <jcoxon> its more to test the system
[23:33] <jcoxon> and i'll cutdown at 23km alt
[23:34] <RocketBoy> are you using voda for firefly gsm?
[23:34] <jcoxon> it'll
[23:34] <jcoxon> yup
[23:34] <RocketBoy> ta
[23:44] <RocketBoy> cu guys
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[23:45] <jcoxon> http://www.pegasushabproject.org.uk/wiki/doku.php/missions:firefly:fhalp-2
[23:45] <jcoxon> at the bottom
[23:47] <natrium42> cool, that is small
[23:48] <jcoxon> it hasn't got the radio module on it yet
[23:48] <jcoxon> so its a bit taller
[23:48] <jcoxon> I'm redoing all the cables right now
[23:49] <natrium42> why?
[23:50] <jcoxon> oh not the stuff in the photo
[23:50] <jcoxon> but my development setup
[23:50] <jcoxon> just making it more secure, its had some wear and tear
[23:51] <natrium42> right
[23:52] <natrium42> do you solder the cables or use connectors?
[23:52] <jcoxon> connectors
[23:52] Action: natrium42 is always afraid that the connectors will come loose
[23:53] <jcoxon> these are pretty secure
[23:53] <jcoxon> and also due to the tightness they are kept in place by being pushed against the side of the payload
[23:56] <natrium42> right, i also use those molex connectors
[23:56] <natrium42> they are pretty good, although the contact area doesn't seem that big
[23:56] <jcoxon> yeah
[23:56] <jcoxon> they do the job and aren't too difficult to crimp
[00:00] --- Fri Feb 8 2008