highaltitude.log.20110610

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[03:25] <Darkside> http://j-tv.me/mJuMbp
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[03:28] <natrium42> hard core console :)
[03:28] <Darkside> haha
[03:28] <Darkside> hows the video quality
[03:29] <natrium42> it's reasonable
[03:29] <natrium42> framerate a bit low
[03:29] <Darkside> ok
[03:29] <natrium42> the top part of the video is repeated twice for some reason
[03:29] <Darkside> i see thaat to
[03:30] <Darkside> duno whats up wih hat
[03:30] <Darkside> anyway, it works
[03:30] <natrium42> yep, so what are you going to fox hunt?
[03:30] <Darkside> lots of stuffh
[03:30] <Darkside> hold, getting ut my laptop
[03:32] <Darkside> ok
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[08:50] <fsphil> morning all
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[09:13] <Darkside> http://pipe2.darklomax.org/pics/2011-06-10_Mt_Gambier_Foxhunting_Comp/
[09:13] <Darkside> just arrived
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[09:17] <Darkside> hey juxta
[09:17] <Darkside> http://pipe2.darklomax.org/pics/2011-06-10_Mt_Gambier_Foxhunting_Comp/
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[09:27] <fsphil> that's quite a collection
[09:28] <mattltm-alt> Hi all :)
[09:42] <Darkside> haha
[09:42] <Darkside> thats all of our rdios
[09:47] <Laurenceb> http://www.youtube.com/watch?v=jPcllaCPBgw
[09:47] <Laurenceb> think we need to take him on a balloon
[09:49] <SpeedEvil> http://www.youtube.com/watch?v=rn2DZQAHuio - with jets.
[09:51] <fsphil> hullo mattltm-alt
[09:52] <fsphil> or should I say, evil-mattltm
[09:55] <mattltm-alt> lol. MHWAAA!!
[09:57] <Darkside> shiiiit
[09:58] <Darkside> what is the APRS decoder software?
[09:58] <Darkside> i.e. sound card to APRS packets output
[10:02] <fsphil> on windows?
[10:03] <fsphil> multipsk will do it, but your eyes will probably burn
[10:03] <fsphil> goggles won't help either
[10:08] <Hibby> agw packet engine and agw tracker are quite a good pair
[10:09] <Hibby> on linux, soundmodem is the classic soft tnc, really
[10:11] <fsphil> soundmodemconfig has a nice packet monitor
[10:11] <fsphil> multimon is another, simpler than soundmodem but only dumps packets to stdout
[10:13] <Hibby> clyde space is lovely this morning
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[10:24] <fsphil> as long as the invaders haven't moved
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[10:32] <Hibby> luckily no
[10:33] <fsphil> how goes the satellite?
[10:33] <Hibby> it now has some sketchy antennas for the purposes of testing the UV transceiver
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[10:35] <Hibby> just noticed it has usb support
[10:39] <Hibby> playing with these today, also
[10:39] <Hibby> http://www.clyde-space.com/cubesat_shop/solar_panels/3u_solar_panels/217_3u-deployed-solar-panel-pumpkin-hinge
[10:41] <mattltm-alt> Very nice, I'll take 6 for my super mini death ray of doom!
[10:41] <Hibby> lol
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[10:43] <Laurenceb> the price O_o
[10:44] <Hibby> this is the TRX I'm working with at the moment
[10:44] <Hibby> http://www.clyde-space.com/cubesat_shop/transceivers_rx_tx/transceivers/168_vhf-uhf-transceiver
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[10:46] <Laurenceb> interesting
[10:46] <Laurenceb> what are the two tqfp ics?
[10:47] <Hibby> i would tell you, but I've not got the hardware on the desk so I can't see sadly
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[10:52] <fsphil> £7,242 -- sheesh just stick an ntx2 in there :)
[10:55] <Hibby> lol, would be ideal relaly
[10:55] <Hibby> s/relaly/really
[10:55] <fsphil> is the electronics section pressurised?
[10:56] <Hibby> fsphil: not to my knowledge
[10:57] <fsphil> has anyone tried flying a cubesat made with basic off-the-shelf stuff like an ntx2 and avr processor?
[10:57] <Hibby> problem is radiation hardning and getting frequency permissions from IARU
[10:59] <fsphil> also I suppose with the high price of launching it, all these expensive boards are actually relatively cheap
[11:00] <Hibby> aye
[11:00] <russss> the IOS Tubesat bus has a Radiometrix by default I think
[11:00] <Hibby> plus, in our case, we're working with clyde space so it's pretty cheap really
[11:00] <russss> http://www.interorbital.com/Downloads/TubeSat%20Sales%20Brochure%20Publish%201.0.pdf
[11:01] <Hibby> russss: that's not sponsored by apple is it?
[11:01] <russss> :/
[11:01] <russss> I'd like to note that Cisco has been using the acronym IOS for a lot longer than Apple.
[11:01] <Hibby> also true, aye
[11:06] <russss> surely you'll have temperature stabilisation issues by just sticking a radiometrix in a satellite though
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[11:35] <fsphil> depends on the module I guess, the VHF modules don't drift as much
[11:39] <fsphil> and they'll probably put a more stable crystal in there if you ask them nicely ;)
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[12:31] <Laurenceb> http://www.youtube.com/watch?v=oaMTSOI1Zk4
[12:31] <Laurenceb> ^ insane
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[13:32] <SamSilver> Dan-K2VOL: gday
[13:34] <Dan-K2VOL> afternoon Dave
[13:36] <SamSilver> I mounted the elements to the boom on both antenna today
[13:36] <SamSilver> Saturday will see me checking the F/B ratio and the forward gain
[13:36] <SamSilver> and SWR
[13:37] <Dan-K2VOL> Nice, what are you measuring with
[13:38] <SamSilver> a club members well equiped shack equipment
[13:38] <SamSilver> any tips?
[13:39] <Dan-K2VOL> well, keep away from metal objects as far as possible
[13:40] <Dan-K2VOL> if you have an antenna analyzer I'd get the manual and read it
[13:40] <Dan-K2VOL> (if he does)
[13:41] <Dan-K2VOL> 434 is a busy band, so watch out for other signals if testing there
[13:41] <SamSilver> right
[13:42] <SamSilver> 433.92
[13:43] <SamSilver> I googled him and found this http://www.qrz.com/callsign?callsign=ZR5S
[13:43] <Dan-K2VOL> Oh and test your coax cables before you do any antenna work if you can, that wasted my time once
[13:43] <Dan-K2VOL> Ah
[13:44] <Dan-K2VOL> Pretty landscape there with his antenna pic
[13:44] <eroomde> Dan-K2VOL: what sort of metrics are you looking to get from your co-ax cables when you test them?
[13:44] <eroomde> just 'it works/doesn't work' or something more!
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[13:44] <SamSilver> that would be local landscape in winter
[13:44] <eroomde> s/!/?
[13:44] <Dan-K2VOL> ha
[13:44] <SamSilver> it is very verdent here in summer
[13:45] <SamSilver> What sort od checks can one run on a length of coax?
[13:45] <SamSilver> *of
[13:45] <Dan-K2VOL> Well, eroomde, samSilver, some analyzers like the MFJ ones will do coax testing for you
[13:45] <Dan-K2VOL> I think they test for obvious shorts,
[13:45] <Dan-K2VOL> And for signal loss
[13:46] <SamSilver> right and conectors
[13:46] <Dan-K2VOL> You need to wiggle the connectors around while testing that
[13:46] <Dan-K2VOL> Yep
[13:46] <eroomde> ok coo
[13:46] <eroomde> l
[13:47] <Dan-K2VOL> Eroomde, my testing has been very empirical
[13:47] <SamSilver> I wil be learning a lot
[13:47] <Dan-K2VOL> there's a lot to learn in RF if you want, endless amounts, it seems
[13:47] <Dan-K2VOL> In fact in my experience it's never clear if you've learned enough ;-)
[13:48] <SamSilver> I know what F/B ratio is but to get a readings and then calculate db head scratch time
[13:48] <Dan-K2VOL> See if he has a field strength meter
[13:48] <Dan-K2VOL> or a spectrum analyzer
[13:49] <Dan-K2VOL> Btw, you should mount that yagi either on something like you'll be using it on in the real world, or something non-metallic if you can, like a wooden chair/table outside
[13:49] <SamSilver> off subject > I have had this thing about using a gas spectrometer on farts
[13:50] <Dan-K2VOL> I realize that it may not be the best season for outside testing, I've been there too though, I had to test RF harmonics of a car remote I was building for work over and over again on a mountaintop for days in the winter :-P
[13:50] <Dan-K2VOL> Oh? what's the plot look like
[13:51] <SamSilver> the 144 is 2.5 meters long
[13:53] <Dan-K2VOL> lol that's a lot to handle
[13:54] <SamSilver> roof mounted on 4x4
[13:54] <SamSilver> or tripod mount
[13:54] <Dan-K2VOL> Ahh wow, going to be transmitting using watch batteries?
[13:54] <Dan-K2VOL> :-P
[13:54] <SamSilver> lol
[13:55] <RocketBoy> eroomde: did you ever get the android phone back from jcoxon's Atlas 2 flight?
[13:55] <SamSilver> any ideas for 40m band antenna? for the flouter
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[13:57] <eroomde> RocketBoy: no idea
[13:57] <eroomde> you'd have to ask ed cunningham
[13:58] <RocketBoy> ah - that ed
[13:58] <RocketBoy> tis my fault I thought jcoxon ment you
[13:59] <RocketBoy> (just trying to get some data for the balloon) - thanks!
[13:59] <Dan-K2VOL> SamSilver are the yagis for balloon tracking or satellite work?
[13:59] <SamSilver> balloon
[14:00] <SamSilver> 433 is a hand held
[14:01] <SamSilver> 24 inch long
[14:01] <SamSilver> 6 x element
[14:02] <Dan-K2VOL> that's cool, such high gain will allow you to use much lower power in the payload if you want, and certainly help direction find if needed on the ground!
[14:02] <SamSilver> tracking a 600mW CW
[14:02] <Dan-K2VOL> Ahh yes
[14:04] <SamSilver> for 40m I was thinking getting a blimp or balloon to lift a 20m wire
[14:05] <SamSilver> your thought?
[14:05] <SamSilver> 1. wind
[14:05] <SamSilver> what wire?
[14:11] <Dan-K2VOL> well, depends on how long you want it up. A normal weather balloon would be fine for a day, might want a small aerostat/blimp if it's going to fly many times
[14:11] <Dan-K2VOL> I've never done anything like that, except hf from free flying balloons
[14:11] <SamSilver> http://www.youtube.com/watch?v=hciDq7MYL2U
[14:12] <Dan-K2VOL> But I've seen guys do it on the internet :-P
[14:12] <Dan-K2VOL> Can't watch at work
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[14:13] <SamSilver> it is a video of a 37 foot inflatable mast
[14:13] <Dan-K2VOL> Nice
[14:14] <SamSilver> I found a 30meter inflatable mast but price is crazy
[14:14] <SamSilver> 37 foot is out of my limit
[14:16] <SpeedEvil> I don't watch erections on youtube.
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[14:17] <SamSilver> on XXX cheerleader?
[14:20] <chris_99> SamSilver, have you seen these kind of things too http://www.photomastsolutions.co.uk/about.php
[14:20] <chris_99> metal pole masts
[14:20] <SpeedEvil> I only have a ~8m pole mast - made from bamboo
[14:20] <SamSilver> chris_99: that is perfect
[14:21] <SpeedEvil> Low wind only
[14:21] <SamSilver> but i ould only be able to afford that if i made it my self
[14:21] <SamSilver> myself
[14:21] <chris_99> you could rent one if you don't need it all the time
[14:22] <Dan-K2VOL> what's the purpose of the 40m
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[14:22] <SamSilver> i will look into it chris_99
[14:22] <SpeedEvil> You mean just a 40m dipole?
[14:22] <SamSilver> Dan-K2VOL: 40m is for cw on the flouter
[14:23] <SamSilver> SpeedEvil: yip but vert polorized
[14:23] <Dan-K2VOL> you could just use a regular pole mount HF vertical
[14:24] <SamSilver> Dan-K2VOL: yip but I want max length for best results
[14:24] <SpeedEvil> Don't you need a half-wave - or 20m?
[14:24] <Dan-K2VOL> Hmm
[14:24] <SamSilver> half wave is what I am aiming at
[14:24] <SpeedEvil> ah
[14:24] <Dan-K2VOL> What are you trying to optimize? Lowest power possible on the balloon? Max baud rate?
[14:25] <SamSilver> distance
[14:25] <SamSilver> 5 watts
[14:25] <Dan-K2VOL> holy crap
[14:26] <Dan-K2VOL> that's more than I've ever had HF power on a balloon
[14:26] <Dan-K2VOL> 1 watt will take you to the radio horizon with no problem, using pretty much any HF receiving antenna, horiz or vert polarized
[14:27] <SamSilver> once it 1000 km away from me 5 watts is not much
[14:27] <SamSilver> Dan-K2VOL: think big > think kangaroos
[14:27] <Dan-K2VOL> ahh nice
[14:28] <SamSilver> mate
[14:28] <SamSilver> lol
[14:28] <Dan-K2VOL> Well, my advice is to rely on listeners on SpaceNear.us or similar systems for your telemetry, you simply will not have propagation back to you most of the time
[14:29] <SamSilver> I agree
[14:29] <Dan-K2VOL> On our spirit of knoxville flights we had 1 watt on 10MHz, and hardly ever heard it again after it left our radio horizon in Tennessee, USA
[14:30] <Dan-K2VOL> It went 5300km, and thankfully we had a network of folks using a system like spacenear.us
[14:31] <SamSilver> that was a great flight
[14:31] <Dan-K2VOL> and we got telemetry from about 60% of the flight time
[14:31] <SamSilver> I think sputnik had 1 watt on 10 mhz
[14:31] <Dan-K2VOL> Cool, were you watching at the time?
[14:32] <Dan-K2VOL> Really
[14:32] <SamSilver> not live, only found it after the fact
[14:32] <Dan-K2VOL> 5 watts is great if you can power it, it will really help get through the noise
[14:33] <Dan-K2VOL> do you have any estimates on the time it will take to make the crossing?
[14:33] <SpeedEvil> Solar?
[14:34] <SamSilver> jet stream willing
[14:35] <SamSilver> 75 hours
[14:35] <SamSilver> I am busy paying my staff so will be typing slowly for a bit
[14:35] <Dan-K2VOL> K
[14:36] <SamSilver> TXing only every 15 mins > morse code > CW
[14:37] <SamSilver> morse has great penertration
[14:37] <Dan-K2VOL> However it has poor computer decoding :-)
[14:37] <Dan-K2VOL> I mean :-(
[14:37] <SamSilver> but then you spend longer TXing
[14:38] <Dan-K2VOL> Your flight will require the same performance as the White Star Trans-Atlantic flight
[14:39] <SamSilver> yes but I expect a a lot of probs with home made zp envelope
[14:40] <Dan-K2VOL> yeah lol well we bought ZP envelopes from the only company that would sell to us and we can see problems with them already
[14:40] <SpeedEvil> I wonder if indoor inflation - then leaving 24h to se if it leaks would be a good plan
[14:40] <SamSilver> SpeedEvil: you are a mind reader
[14:41] <Dan-K2VOL> SpeedEvil - we cannot do that with ours - to minimize weight the balloon envelope construction cannot withstand the force of being fully inflated with helium at ground level!
[14:41] <SpeedEvil> I diddn't mean fully inflated
[14:41] <SpeedEvil> Even partly will help
[14:42] <SamSilver> sh!t I never thought of the loading bugger
[14:42] <Dan-K2VOL> ours is designed for 1/3 inflation at sea level, which leavs 2/3 of the balloon un-tested for leaks :-(
[14:43] <SpeedEvil> I suppose you could do air/helium - to fill it but not overload
[14:43] <Dan-K2VOL> fully inflated it would lift 35kg
[14:43] <SpeedEvil> But that's going to mean the pain of emptying
[14:44] <Dan-K2VOL> Yeah the air/helium mix is actually probably the way to go, the helium actually will mix pretty homogeneously
[14:44] <SamSilver> SpeedEvil: please fill out an aplication form for the position of Chief ZP Engineer
[14:44] Action: SpeedEvil inks up his hand in purple ink, and applies it to the form.
[14:44] <Dan-K2VOL> SamSilver the guy we bought from will sell them internationally if you're interested, but they're kind of hit-or-miss on quality
[14:45] <SpeedEvil> Hydrogen/10% oxygen.
[14:45] <SpeedEvil> No problems with cut-downs.
[14:46] <SamSilver> price please Dan-K2VOL
[14:46] <Dan-K2VOL> $300 an envelope for a jet-stream altitude one
[14:46] <Dan-K2VOL> USD
[14:46] <SpeedEvil> What's it made of? PE?
[14:46] <russss> pretty reasonable price
[14:47] Action: russss is still trying to get hold of a ~3m blimp envelope with little success
[14:47] <Hibby> exam tonight cancelled
[14:47] <Hibby> rsgb didn't deliver the papers
[14:48] <Dan-K2VOL> Yes, 4 mil PE i believe
[14:48] <eroomde> russss: how about 4m?
[14:48] <eroomde> would that be too big?
[14:51] <SamSilver> BBL thanx all the totmbo has called me.
[14:53] <Dan-K2VOL> The Mandolin and Bouzouki of Tim O'Brien?
[14:53] <Dan-K2VOL> Sorry that's all that comes up when googling TOTMBO :-P
[14:54] <russss> eroomde: not particularly picky about the size
[14:54] <russss> we just need something which will fly well indoors and has enough capacity to lift a light camera and some autopilot bits.
[14:55] <eroomde> russss: http://minizepp.com/index.php/products/indoor
[14:56] <russss> what's their pricing like? because we're trying to do this on a budget
[14:56] <russss> (will they sell the envelope on its own?)
[14:56] <eroomde> hmm, i don't know about the little ones
[14:56] <Dan-K2VOL> How heavy is your payload russs
[14:57] <russss> I have misplaced my spreadsheet
[14:57] <eroomde> but probably ~ 1000 euro for envelope alone
[14:57] <russss> 0.5-1kg is the approx range
[14:57] <russss> eroomde: yeah, that's the kind of price I was getting off other people too
[14:57] <russss> which seems like it has a pretty sizable markup incorporated in it
[14:57] <eroomde> you mean like a salary...
[14:58] <SamSilver> The One That Must Be Obeyed
[14:58] <Dan-K2VOL> thank you SamSilver :-)
[14:58] <SamSilver> k
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[14:59] <russss> heh, sure. They're short-run items so I can understand the markup
[14:59] <eroomde> but yes, it's certainly not raw materials + 20%
[14:59] <Dan-K2VOL> russss have you considered the blimpduino?
[14:59] <russss> Dan-K2VOL: see, that's based on commercial mylar blimp envelopes
[15:00] <Dan-K2VOL> yeah requires a very light payload
[15:00] <russss> which are a little bit too small, they only have ~80g free lift
[15:00] <russss> but on the plus side, they're massively cheap
[15:00] <eroomde> a swarm
[15:00] <Dan-K2VOL> It may be worth seeing if you can test parts of your system using those
[15:00] <russss> presumably because they use the same process as making party balloons
[15:00] <russss> yeah we have one already
[15:00] <Dan-K2VOL> Lol nice
[15:20] <Dan-K2VOL> I wonder how bad a latex balloon is to navigate around indoors
[15:21] <Dan-K2VOL> Actually, why not make your own blimp by giving the latex balloon a girdle
[15:27] <eroomde> a girdle?
[15:27] <eroomde> hmm, googling that was a mistake
[15:27] <eroomde> well anyway, a balloon is going to have a uniformly crap Cd and stability in any direction
[15:28] <eroomde> almost 0.5 Cd
[15:28] <Dan-K2VOL> Haha
[15:28] <eroomde> whereas a blimp shape has a Cd of about 0.02
[15:28] <eroomde> so 10-20 times less drag than a balloon
[15:28] <eroomde> and it has directional stability
[15:29] <SpeedEvil> I thought blimp drag was quite a lot higher than that due to surface effects
[15:29] <Dan-K2VOL> quite a bit better than a balloon.
[15:29] <SpeedEvil> But yes, better than a balloon
[15:29] <eroomde> SpeedEvil: guess it depends on 20 other things
[15:29] <eroomde> size, speed, fluid
[15:29] <eroomde> ok, 3 other things
[15:30] <SpeedEvil> Guess so.
[15:30] <SpeedEvil> Surface finish
[15:30] Action: SpeedEvil throws a golfball.
[15:30] <Dan-K2VOL> you could basically squeeze the spherical balloon into a fabric cylinder, approaching a blimp shape
[15:30] <eroomde> well, that's what minizepp do, effectively
[15:30] <Dan-K2VOL> interesting!
[15:31] <eroomde> there's an inner bladder but the shape and strength comes from a nylon liner skin
[15:31] Action: SpeedEvil holds up a largely cylindrical balloon with a surface patterning to reduce drag.
[15:31] <eroomde> the bladder is certainly produced to be more of a blimp shape, don't get me wrong
[15:31] <Dan-K2VOL> hell, sounds like a sewing project to put plans on the internet for
[15:31] Action: SpeedEvil puts the box of textured condoms away.
[15:32] <eroomde> right, home time
[15:32] <eroomde> bbl
[15:32] <Dan-K2VOL> Ttyl ed
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[16:41] <Dan-K2VOL> Anyone ever use any apps to explore .csv captures from oscilloscopes?
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[16:55] <eroomde> sounds like a job for numpy and matplotlib
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[16:57] <Dan-K2VOL> Well, matplotlib sure makes gorgeous stuff
[16:58] <Dan-K2VOL> But I'm looking for more of an interactive tool, really like the oscilloscope itself was. (Sadly I have very infrequent access to the machine itself)
[16:59] <eroomde> oh eg timbase adjustment and panning around
[16:59] <Dan-K2VOL> But I'll fiddle with those
[16:59] <Dan-K2VOL> Yeah
[16:59] <eroomde> matlab :s
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[17:54] <griffonbot> Received email: Lee West "[UKHAS] COEX1 Launch - Saturday 11th June"
[18:01] <mattltm> Hibby!!!!!
[18:02] <Hibby> hola
[18:02] <Hibby> Satellite grew a little bit today
[18:02] <mattltm> HaK5?
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[18:03] <mattltm> Was that you?
[18:03] <Hibby> very same, yep
[18:03] <Hibby> darren's a good friend :)
[18:04] <mattltm> Nice. I was just watching a random epesode on this boxee I have just set up and you poped up!
[18:04] <mattltm> Random!
[18:04] <Hibby> je suis everywhere
[18:04] <mattltm> lol.
[18:05] <Hibby> mattltm: should check out the irc. It's utter pandemonium
[18:06] <Hibby> makes anything on freenode look sane
[18:07] <Hibby> http://www.flickr.com/photos/djhibby/5818940846/ <== it grew a bit today
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[18:10] <SpeedEvil> Hibby: Have you approached sellotape for sponsorship?
[18:11] <Hibby> SpeedEvil: not yet, but it's a good solution for keeping the solar panels in place
[18:11] <Hibby> this is just the engineering model, so its allowed to be bodged
[18:11] <Dan-K2VOL1> !ping Rocketboy
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[18:14] <mattltm> Hibby: what irc channel?
[18:15] <Hibby> #hak5 on irc.secfo.org / irc.hak5.org
[18:15] <Hibby> we call it multiplayer gedit
[18:15] <mattltm> cool
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[18:47] <fsphil> what evil is Hibby doing now? :p
[18:49] <fsphil> cool .... http://www.southgatearc.org/news/june2011/atlantis_video.htm
[18:51] <mattltm> Nice.
[18:51] <fsphil> oh man the prediction for tomorrow is brilliant
[18:51] <fsphil> now if only I had a payload
[18:51] <fsphil> http://habhub.org/predict/#!/uuid=4ab956e2832bcbab98e24010d02597d451588e03
[18:51] <mattltm> Go make an antenna launcher!
[18:53] <fsphil> I've got a sling shot thingy, if it comes to it we'll throw stones at it until it falls out :)
[18:53] <mattltm> lol.
[18:56] <SpeedEvil> fsphil: Take along a new battery, some heliuum and a balloon - you never know
[18:56] <fsphil> I think I will actually
[18:56] <fsphil> I'll have the radio stuff to track coex1
[18:59] <mattltm> Any launches this weekend?
[18:59] <fsphil> coex1 tomorrow morning
[18:59] <mattltm> Oh, where from?
[19:00] <fsphil> "Stenigot which is near to Louth"
[19:00] <fsphil> near the coast, risky :)
[19:09] <mattltm> Ah, not sure i would have much luck from here.
[19:09] <natrium42> fsphil: use an R/C heli :P
[19:11] <fsphil> with a giant hook underneath
[19:11] <mattltm> lol
[19:11] <mattltm> Or a quadcopter :)
[19:12] <fsphil> last time I flew an R/C helicopter it slightly met the ground sideways
[19:13] <SpeedEvil> Did it make friends?
[19:13] <fsphil> I think so :)
[19:13] <fsphil> they've been close ever since
[19:14] <Dan-K2VOL1> Ha fsphil
[19:15] <Dan-K2VOL1> Fsphil I am working rapidly on that water cutdown so that might be avoided in the future, the mechanism works great now, I'm getting it to delay now so that it can withstand clouds and rain in-flight
[19:16] <fsphil> it's a brilliant idea
[19:16] <fsphil> and we've had plenty of rain lately
[19:17] <mattltm> What about some sort of simple timer pull pin?
[19:17] <Dan-K2VOL1> I got it to delay 13 minutes last night after the addition of 10ml of water
[19:17] <mattltm> Like a small travel alarm clock?
[19:18] <Dan-K2VOL1> I'm keeping it as simple and passive (nonpowered) as possible, to be able to activate long into the future if there's a dry spell
[19:18] <mattltm> I like it :)
[19:18] <mattltm> But would be a bit worried about payloads dropping from height with no chute!
[19:18] <Dan-K2VOL1> Of course
[19:19] <Dan-K2VOL1> It will need to be tested on lots of balloon flights as a secondary payload first, not as a support device
[19:19] <SpeedEvil> http://en.wikipedia.org/wiki/Casio_F91W - timer?
[19:19] <Dan-K2VOL1> har har speedevil, you just want to see me get carted off in the paddy wagon
[19:19] <Dan-K2VOL1> :-P
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[19:20] <mattltm> I'll bulk order a few to a "friends" po box :)
[19:21] <fsphil> what is the mechanism that cuts the cord?
[19:22] <Dan-K2VOL1> It pulls a pin out of a tube - see http://youtube.com/steamfire
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[19:22] <Dan-K2VOL1> The pin crosses through the tube, supporting the payload
[19:22] <Dan-K2VOL1> The tube is supported from rope above
[19:23] <Dan-K2VOL1> The spring clip is tied down by PVA thread, which simply dissolves when wet, causing the spring to release extremely rapidly, pushing the pin out
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[19:25] <fsphil> cute
[19:31] <fsphil> I wonder how well it would get out of a tree like this
[19:34] <Dan-K2VOL1> I envision it being mounted right at the payload box, so there's only about 10cm of rope left on the box when it releases
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[20:49] <fsphil> cool, literally: http://www.bbc.co.uk/news/uk-wales-north-west-wales-13731216
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[21:28] Action: MrCraig clicks and reads some of fsphil's link and starts to panic, stuffing draught excluders into the doors and fetching kindling and fuels. I've seen that movie where the cold creeps in because of a climate change.
[21:29] <fsphil> it has been a pretty chilly spring so far
[21:29] <MrCraig> maybe there's something in it
[21:30] <fsphil> hollywood, doubt it :)
[21:30] <MrCraig> we've had showers a lot too, but then - we didn't get them in april so I think they're just late this year.
[21:31] <fsphil> more or less the same story here
[21:31] <fsphil> had some really heavy hail today -- spotted a funnel cloud too !
[21:32] <MrCraig> !
[21:32] <MrCraig> We tend to get what you do, upto about 18 hours later I guess?
[21:32] <fsphil> quicker than that normally
[21:33] <MrCraig> Sheltering from a shower cost me 10 mins today and I got a ticking off at work for being late back from lunch, pft.
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[21:35] <Lunar_Lander> hello
[21:35] <fsphil> just hope it's try tomorrow when we're back up that mountain
[21:35] <fsphil> dry*
[21:35] <Lunar_Lander> hello fsphil
[21:36] <fsphil> hiya LL!
[21:36] Action: fsphil is trying to be cunning with an SSD -- trying to secure erase it, but the bios is locking it
[21:36] <MrCraig> good luck tomorrow fsphil
[21:37] <fsphil> who all is involved with the coex1 launch tomorrow?
[21:39] <Lunar_Lander> fsphil did the recovery succeed?
[21:39] <fsphil> will let you know tomorrow :)
[21:40] <griffonbot> Received email: Steve Randall "[UKHAS] COEX1 Launch - Saturday 11th June"
[21:41] <fsphil> yea that one :)
[21:42] <sbasuita> fsphil: be wary of wearing out that ssd
[21:44] <fsphil> reinstalling the os, trying to do a secure erase. shouldn't hit the ssd that hard?
[21:44] <SpeedEvil> Just trim() it
[21:44] <SpeedEvil> it erases it all itself
[21:45] <fsphil> I think this drive pre-dates tri
[21:45] <fsphil> trim
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[21:54] <fsphil> woo, gotcha
[21:54] <fsphil> not locked
[21:58] <sbasuita> fsphil: won't the flash sectors wear out?
[21:58] <fsphil> no worse than when I format it
[21:59] <sbasuita> fsphil: if you're doing 'secure delete', i'm assuming that means repeatedly writing random bytes over the data?
[22:00] <fsphil> ah no, it sends the ssd an erase command -- it only resets what sectors the disk thinks is being used
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[22:04] <fsphil> erased, nice
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[23:25] <kf5kwe> finished my payload box
[23:25] <kf5kwe> it looks lopsided lol
[23:27] <Lunar_Lander> xD
[23:28] <kf5kwe> made it from styrofoam block, cut into squares for the walls and bottom, then put a leftover on top
[23:28] <kf5kwe> then duck tapped it all together and put rope thru it
[23:28] <Lunar_Lander> cool
[23:29] <kf5kwe> in retrospect
[23:29] <kf5kwe> should have used a cooler
[23:36] <Lunar_Lander> yea
[23:39] <Lunar_Lander> jonsowman or priyesh here?
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[00:00] --- Sat Jun 11 2011