highaltitude.log.20110405

[00:03] <SpeedEvil> h
[00:03] <hibby> hola
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[01:04] <SAIDias> howd
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[07:03] <Upu> Morning
[07:03] <Upu> we really got a launch today ? There are birds flying backwards outside
[07:16] <SamSilver> Upu - Shuuu smart birds they are to manage that against such a strong wind. :p
[07:16] <Upu> :)
[07:17] <Upu> any flight predictions ?
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[07:25] <SamSilver> as a balloon pilot myself My prediction is: downwind
[07:26] <SamSilver> think i should change my nic to SmartAss
[07:43] <fsphil> haha
[07:44] <fsphil> no launch today Upu, email said tomorrow or thursday
[07:46] <fsphil> only people like me launch in weather like this *g*
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[07:54] <Shuffty> Morning all...
[07:54] <SamSilver> top of the morning to you
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[08:05] <fsphil> morning Shuffty
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[08:14] <Shuffty> morning fsphil!
[08:14] <Shuffty> Sorry about that - logged in and then disapeared for a brew
[08:14] <Shuffty> :-)
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[08:15] <Shuffty> Tested the aerial last night... not sure if it's good or bad - got at least 3km from garden to garden in high dense residential area... Need to do a line of sight test really..
[08:16] <fsphil> that's pretty good
[08:16] <Shuffty> really!
[08:16] <Shuffty> :-)
[08:16] <Shuffty> I was worried is wasnt good enough
[08:19] <chembrow> morning all
[08:20] <Shuffty> Morning..
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[08:22] <Shuffty> Is the skypod launch today then?
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[08:25] <fsphil> silly internet
[08:26] <fsphil> no launch today -- nasty weather
[08:26] <chembrow> shame. I'm working from home today, might have been able to do some tracking
[08:27] <fsphil> aye
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[08:38] <Lunar_Lander> hello
[08:38] <Shuffty> Hey Lunar
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[08:40] <Lunar_Lander> how are you today?
[08:41] <Shuffty> Stressed :-)
[08:41] <Shuffty> brb
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[08:49] <MrCraig> mornin
[08:50] <jgrahamc> Morning all.
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[08:53] <NigelMoby> Morning all
[08:54] <MrCraig> morning NigelMoby & jgrahamc
[08:55] <NigelMoby> Hey mrcraig, how's you?
[08:56] <MrCraig> I'm good thanks, just tired. Had a late night and need to get out today and fetch the helium
[08:57] <MrCraig> hows yourself?
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[09:00] <NigelMoby> Not to bad, seem to have woken up deaf in 1 ear though which is slightly worrying
[09:00] <fsphil> been happening a lot these past few nights
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[09:01] <NigelMoby> Hey Phil, guess Freenode still having pros :/
[09:01] <NigelMoby> Probs*
[09:01] <MrCraig> for what it's worth that's not uncommon for me at the moment. I get synus head aches and hearing issues because of some issue that the doctor gave me antibiotics for - but I didn't start them yeat
[09:01] <MrCraig> hey fsphil
[09:02] <fsphil> yea I was on the wrong side of that split :)
[09:02] <MrCraig> yeay=yet
[09:02] <NigelMoby> Yikes, I put mine down to years of loud music as I used to be a dj :/
[09:03] <MrCraig> I guess that could do it too
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[09:03] <NigelMoby> Occupational hazard :(
[09:04] <chembrow> jgrahamc do you have any idea what time you're hoping to be launching on Sunday?
[09:04] <jgrahamc> I haven't broken the news to Ed yet but I'm hoping to launch at 0900 UTC (i.e. 1000 BST).
[09:04] <NigelMoby> Hey chembrow
[09:04] <jgrahamc> I suspect it will actually be a bit after that.
[09:04] <chembrow> morning NigelMoby
[09:05] <NigelMoby> Bill time? :p
[09:05] <jgrahamc> Latest blog post has the most up to date info: http://blog.jgc.org/2011/04/gaga-1-integration-testing.html Main news there is that James Coxon is adding a Hellschreiber beacon to GAGA-1.
[09:05] <chembrow> jgrahamc that's not too early. I have to go down to London Sunday evening so I was hoping for an AM launch
[09:06] <jgrahamc> I'm hoping to launch in the morning and get the flight over around lunch time.
[09:07] <NigelMoby> Gonna be a busy w/e for trackers!
[09:07] <jgrahamc> Yes. The weather is looking good so far.
[09:07] <LazyLeopard> Who was talking yesterday about an 04:30 launch?
[09:07] <NigelMoby> Jonsowman
[09:07] <chembrow> ouch
[09:08] <chembrow> that's not gonna get many trackers :)
[09:08] <NigelMoby> They want to catch sunrise on video
[09:08] <MrCraig> Going out today (after helium) to get a cable for my beam - so I'll try to help out with tracking too
[09:08] <LazyLeopard> Saturday 04:30 if my memory serves...
[09:09] <NigelMoby> Yup, ill be up but i doubt ill hear it until an hour into flight at least.
[09:09] <chembrow> jgrahamc do you have any design details on the beacon? Might be something I can try and sneak in my payload, if I can get it small enough
[09:09] <Shuffty> Where's it launching from?
[09:10] <jgrahamc> You'd have to ask jcoxon. He's building it and shipping it to me.
[09:10] <chembrow> ok, will do, thanks
[09:11] <NigelMoby> Chembrow, I can send you a link for a c/w beacon that I'm going to try on ATS-1
[09:11] <chembrow> NIgelMoby yes please
[09:11] <jgrahamc> Shuffty: the wiki says Churchill: http://ukhas.org.uk/general:upcoming_launches
[09:11] <NigelMoby> Bill has the basic design on his site which I'm going to try.
[09:12] <Shuffty> Thanks jgrahamc
[09:13] <NigelMoby> http://hiwaay.net/~bbrown/projects.htm
[09:13] <LazyLeopard> There are quite a few planned launches on that page of a sudden... :)
[09:13] <chembrow> thanks
[09:14] <fsphil> good to see!
[09:14] <NigelMoby> Np, its basically just an avr, xmitter and batteries
[09:15] <griffonbot> Received email: John GM8OTI <gm8oti@googlemail.com> "[UKHAS] Re: SKYPOD LAUNCH"
[09:15] <Upu> I'm ready to go as well
[09:15] <Upu> just waiting on confirmation to launch from near York
[09:15] <jgrahamc> Brilliant Upu
[09:15] <NigelMoby> Yey ava gets to fly!!!
[09:15] <chembrow> yeah, not too bad. I've got a spare NTX2, just need to play with the code. might look at using something other than an arduino.
[09:16] <fsphil> the pink box of pinky doom!
[09:16] <jgrahamc> I think it's a lovely colour. Just needs a Hello Kitty decal stuck to the outside for maximum cuteness.
[09:17] <fsphil> big furry ears!
[09:17] <fsphil> hehe, I like this just for the oddness: http://habhub.org/predict/#!/uuid=eda34c422bab2b110e041e0b9f4bb5d9df9482fe
[09:17] <NigelMoby> Use a atmega168 with lilypad bootloader, int Oscillator, no vreg needed either.
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[09:18] <jgrahamc> Too funny fsphil. It's toying with you... I'm going to land in the sea, no I'm not I'm turning in land, ha ha splash.
[09:18] <fsphil> lol!
[09:18] <chembrow> no vreg, what does it run at? 3v?
[09:19] <NigelMoby> It'll run fine at 3v if you use 2 aa batts
[09:19] <NigelMoby> Ntx 2 is int regulated
[09:20] <MrCraig> ntx2 isn't regulated?
[09:20] <chembrow> that's nice, keeps the space requirements down. will look at that.
[09:20] <fsphil> it's got a 3v regulator built-in
[09:20] <NigelMoby> It's got an int regulator mrcraig
[09:20] <fsphil> though once the battery drops below that, it's going to start dropping in frequency
[09:21] <MrCraig> *nods that was my understanding, and it's 2.8v I thought but 3 is near as need
[09:21] <NigelMoby> Phil that predict is loopy LOL
[09:21] <chembrow> anyway, I suppose I should probably do some work. After a cup of tea.
[09:22] <fsphil> yep, 2.8v
[09:22] <chembrow> BBL
[09:22] <fsphil> my brain rounded it up :)
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[09:22] <fsphil> I'm guessing chembrow is using KDE :)
[09:22] <NigelMoby> Eugh
[09:23] <NigelMoby> Bloatware
[09:36] <NigelMoby> http://www.bbc.co.uk/news/science-environment-12969167
[09:36] <NigelMoby> Worrying
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[10:15] <Laurenceb_> arg stupid vat
[10:15] <Laurenceb_> thought things llooked too cheap
[10:22] <Shuffty> The only nice thing about being registered for vat, if being able to claim it back off your toys!
[10:24] Action: Laurenceb_ just sepent £80 on parts from mouser
[10:30] <Shuffty> Anything exciting?
[10:31] <Laurenceb_> autopilot board parts
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[10:31] <Laurenceb_> just need to order a bunch of passives from farnell now
[10:32] <Shuffty> Sounds like fun - what are you building?
[10:32] <Laurenceb_> stm32 + imu + gps + rf
[10:32] <Laurenceb_> uberboard XD
[10:33] <Shuffty> :-)
[10:35] <Laurenceb_> main thing i need to find now is some nice anti vibration mounts
[10:35] <Laurenceb_> need to look at pc quietening kit i think
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[10:40] <fsphil> one of my pc cases came with a nice kit to dampen drive noise
[10:41] <fsphil> little rubber pad that sits between the screws and the case
[10:41] <fsphil> really simple but worked well
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[10:43] <Laurenceb_> yeah
[10:43] <Laurenceb_> i have M3 holes in the pcb
[10:43] <Laurenceb_> ideally i want something to fit in with M3 threaded bar or something
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[11:24] <NigeyS> bloody cat grrrrrrr
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[11:27] <NigeyS> hey Shuffty
[11:27] <fsphil> evil cat or stupid cat?
[11:27] <NigeyS> evil, threw up on my kitchen floor!
[11:27] <Shuffty> hey nigeys
[11:27] <Shuffty> :-)
[11:27] <fsphil> lovely
[11:28] <NigeyS> his own fault for killing and eating birdies!
[11:29] <fsphil> cat gloves .. he'll never catch another bird!
[11:30] <Randomskk> all the other cats will laugh at him
[11:30] <Randomskk> or indeed her
[11:30] <fsphil> true .. but he can beat them up (boxing gloves)
[11:30] <NigeyS> lol !
[11:30] <NigeyS> wouldnt mind so much but each trip to the vets when he gets ill if over £100 :/
[11:31] <NigeyS> is*
[11:32] <fsphil> it's going to get worse in a month and a bit, with all the chicks flying about
[11:32] <NigeyS> yup, he'll be in heaven :(
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[11:35] <fsphil> I should build a pan/tilt water squirter system to keep the cats out of the garden
[11:36] <NigeyS> lol yush!
[11:36] <NigeyS> although, mine doesnt mind water, he has a bath once a week
[11:36] <fsphil> weird cat
[11:37] <NigeyS> that he is, claws you a bit when you go to put him in, but ones he's in there, he quite likes it :|
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[11:40] Action: Laurenceb_ tries and fails to mention fishing cat
[11:40] <Laurenceb_> *not to
[11:41] Action: Laurenceb_ needs more mindbleach
[11:41] <NigeyS> hehe hey laurence
[11:42] <fsphil> don't use too much of that or you'll
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[11:53] <Shuffty> quick querstion for you ... on the ntx2, there are 2 rf grounds - I'm connecting 1 to the coax - does the other goto ground on the pcb?
[11:54] <fsphil> ideally both go to the coax
[11:54] <jonsowman> both to coax shield
[11:54] <Shuffty> Cool - thanks for that!
[11:54] <Shuffty> :-)
[11:55] <fsphil> related question -- how many people connect rf gnd to normal gnd?
[11:55] <Darkside> i do
[11:57] <Darkside> WUT
[11:57] <Shuffty> Time to got o work... have a great day everyone! :-)
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[11:58] <Darkside> wrong channel
[11:58] <Darkside> lol
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[12:35] <jgrahamc> There's no point connecting RF ground to 0V on the NTX2 because... "RF ground is internally connected to the module screen and pin 6 (0V). These pins should be directly connected to the RF return path - e.g. coax braid, main PCB ground plane etc."
[12:35] <jgrahamc> So says the datasheet. Of course, you are not doing any harm.
[12:41] <hibby> hmm
[12:41] <hibby> might have to go in and check the satellite station's config before tomorrow's launch
[12:42] jkominar (~justin@64.235.97.218) joined #highaltitude.
[12:44] <fsphil> it includes the PCB ground plane as part of the RF return path
[12:45] <fsphil> but yea I don't think it's important
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[12:49] <Elwell> hibby: like 'is it on and pointing vaguely south?'
[12:50] <hibby> Elwell: nah, I got a scary email from the lazy soapdodger that preceeded me.
[12:51] <hibby> He didn't properly torque the bolts that hold the antenna stack together.
[12:51] <hibby> "In light of the high winds, I felt it prudent to advise you".
[12:51] <hibby> Yes. Thanks.
[12:53] <fsphil> he sent that, during the high winds?
[12:56] <hibby> aye.
[12:57] <hibby> And it's not like I can wander onto the roof of the 6 storey uni building at one of Glasgow's highest points in 45mph+ winds
[12:58] <LazyLeopard> Oh great...
[13:03] Zuph (~bradluyst@2001:470:8:626:222:43ff:fe71:9992) joined #highaltitude.
[13:03] <hibby> It's still there, but I've been a bit worried about the alignment of the 70cm antenna for a few months.
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[13:06] <Elwell> hibby: what, student soapdodger in sloppy engineering shocker? HOLD THE FRONT PAGE :-)
[13:07] <Elwell> s/engineering/science/ cos it looks better
[13:07] <Elwell> I'll lend you a torque wrench and some locktite
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[13:12] <hibby> 'salright, Doc Macdonald has it under control apparantly.
[13:13] <hibby> where under control == "You'll be on the roof with these tools and do this stuff also, Dave"
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[13:14] <SamSilver> Brave Dave
[13:15] <hibby> It's ace on a nice day ~ cracking view of the city
[13:15] <hibby> hopefully I'll bother to mount the webcam and I can show it to y'all
[13:16] <SamSilver> wear tight fitting clothes
[13:17] <SamSilver> thight clothes do not catch the wind as much
[13:17] <hibby> Lol. I'll take the power kite out and live life on the edge
[13:17] <SamSilver> and they keep the bady in one piece after a fall better
[13:17] <SamSilver> body*
[13:17] <SamSilver> lol
[13:18] LazyLeopard (~irc-clien@chocky.demon.co.uk) joined #highaltitude.
[13:18] <hibby> I know that it can lift me off the ground, so there's no reason it can't bring me to ground slower too
[13:20] Dan-K2VOL (~Adium@74-143-44-42.static.insightbb.com) joined #highaltitude.
[13:21] <jgrahamc> Howdy Dan
[13:22] <Dan-K2VOL> morning jgrahamc
[13:22] <Dan-K2VOL> er lunch I suppose there
[13:23] <jgrahamc> We should just agree on a set of 4 hour UTC based time windows and then have a set of greetings based on them.
[13:23] <hibby> skypod launch is go for tomorrow am
[13:23] <hibby> **10 am
[13:23] <jgrahamc> Go hibby
[13:23] <jgrahamc> 1000 BST or UTC?
[13:24] <hibby> local, so BST
[13:24] <hibby> I'll be in the ground station following it.
[13:26] <hibby> spacenear.us and another (gsm based) tracking map have been embedded on the live tracking link at http://sunset-skypod.co.uk/
[13:26] <Dan-K2VOL> oh jgrahamc I like that
[13:26] <Dan-K2VOL> and frankly I'd like it if we all just operated on GMT
[13:26] <Dan-K2VOL> like the space station does, though I'm not sure it's on GMT
[13:27] <russss> the space station shifts their sleep patterns to coincide with visiting vehicles
[13:27] <russss> but they do use UTC
[13:28] <Dan-K2VOL> lol that's imposing, you'd think the visitors wouldn't come barging in and demand everyone stay up late just cause they're there
[13:28] <russss> lol
[13:28] <SamSilver> freaky, what with the date changing every 90 mins
[13:29] <Dan-K2VOL> samsilver - I'd like to see a clock/calendar onboard that actually adjusts for the local time/date under the nadir
[13:29] <Dan-K2VOL> more impressive if it's an analog, the date would go back and forth all day!
[13:30] <jgrahamc> How about a sun dial?
[13:30] <Dan-K2VOL> I saw Matt Mets of Make figured out how to control a normal quartz wall clock using direct connection to an arduial
[13:31] <Dan-K2VOL> jgrahamc thanks, arduino. I read your darn sundial and typed it right out
[13:31] <Dan-K2VOL> I need more hours of sleep
[13:31] <fsphil> sundials never where popular here :)
[13:31] <m1x10> Hi
[13:31] <Dan-K2VOL> hi m1x10
[13:32] <fsphil> g'day m1x10
[13:32] <jgrahamc> Pretty sure that 'arduial' is the a word describe the ordeal of getting an Arduino working correctly in your HAB project.
[13:32] <hibby> I'll also have a camera set up in the ground station tomorrow
[13:32] <Dan-K2VOL> fsphil, I wonder about an RF or X-Ray sundial!
[13:32] <Dan-K2VOL> I bet those would work there
[13:32] <fsphil> actually ... that's a nifty thought :)
[13:33] Dan-K2VOL1 (~Adium@74-143-44-42.static.insightbb.com) joined #highaltitude.
[13:33] <SamSilver> Hibby live streaming?
[13:33] <fsphil> I'm hoping to setup a webcam if I get up the mountain this weekend to do some tracking
[13:33] <m1x10> Im trying to find the right word for the device that takes a number of cameras as input and has a unique output that goes to a TV and presents all the cameras in 4 different segments.
[13:33] <fsphil> m1x10, multiplexer?
[13:33] <m1x10> ee, in greek ? :P
[13:33] <Dan-K2VOL1> or a switcher
[13:33] <fsphil> lol
[13:34] <fsphil> er... multiplexerous?
[13:34] <m1x10> point me to some commercial product plz
[13:34] <Dan-K2VOL1> hmm mixing console perhaps
[13:34] <griffonbot> Received email: andrewallan <andrewscottallan@gmail.com> "[UKHAS] Re: SKYPOD LAUNCH"
[13:34] <Elwell> m1x10: find a cctv company and hunt through catalogue
[13:34] <SamSilver> PIP
[13:34] <Dan-K2VOL1> something like this http://www.2mcctv.com/four-camera-multiplexer/
[13:35] <Dan-K2VOL1> that's NTSC, but you get the idea
[13:35] <m1x10> omg that expensive
[13:35] <Dan-K2VOL1> well, yeah
[13:35] <m1x10> something cheap
[13:35] <fsphil> they're not simple devices
[13:35] <m1x10> oh
[13:35] <m1x10> :(
[13:35] <Dan-K2VOL1> you're better off doing it with a computer and video software
[13:35] <Dan-K2VOL1> linux has some great security cam softwares
[13:35] <Dan-K2VOL1> if you need cheap
[13:35] <fsphil> yea, I use two capture cards to do a split-screen webcam
[13:36] <Dan-K2VOL1> you could use WireCast, that's what we use for White Star's streaming video
[13:36] <Dan-K2VOL1> you can easily do what you want
[13:36] <Dan-K2VOL1> if you have a beefy processor / video card
[13:36] <Dan-K2VOL1> fast I mean
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[13:36] <Dan-K2VOL1> (sorry I try not to use slang here that might be just US slang)
[13:37] <Elwell> or low end cpu and accessible (in software) GPU
[13:37] <Dan-K2VOL1> cool
[13:38] <Dan-K2VOL1> wirecast is easy to use, and I'm sure there are other similar programs for multiple-cam live video streaming
[13:38] <Dan-K2VOL1> the bonus of wirecast is it will ustream and justin.tv too, if you want
[13:38] <m1x10> fsphil: SQC-400
[13:38] <m1x10> 60 euros
[13:39] <Dan-K2VOL1> haha do the i'm feeling lucky on google for SQC-400
[13:40] <fsphil> lol
[13:41] <fsphil> you'd need the PAL version m1x10
[13:42] <fsphil> that seems to be NTSC -- though that's from a google japanese translation
[13:45] <m1x10> it is PAL
[13:45] <m1x10> http://www.emimikos.gr/shop/product.php?productid=19575&cat=772&page=1
[13:45] <m1x10> 720X576 (PAL)
[13:47] Nick change: phuzion_ -> phuzion
[13:48] <fsphil> aah
[13:49] <fsphil> I was reading this: http://www.selco.ne.jp/products/catalog/sqc-400.html
[13:49] kd0mto (~dago@64-121-236-126.c3-0.eas-ubr3.atw-eas.pa.cable.rcn.com) joined #highaltitude.
[13:49] <fsphil> it may do both
[13:54] <NigeyS> anyone want a cat? free postage ....
[13:56] <W0OTM> Howdy
[13:56] <NigeyS> hey W0OTM
[13:56] <W0OTM> iHAB cutdown module http://t.co/iuFRg3G
[13:56] <fsphil> cat5?
[13:56] <W0OTM> http://t.co/V0N5aGg
[13:57] <NigeyS> this ones CatU phil ;)
[13:57] <NigeyS> W0OTM, tnx for hat !
[13:57] <NigeyS> that*
[13:57] <W0OTM> NigeyS: NP, I will make a youtube video this week
[13:58] <NigeyS> that would be most helpful, appreciated :D
[13:58] <jgrahamc> What knots are those loops tied with W0OTM?
[13:58] <W0OTM> dunno, granny maybe
[13:58] <W0OTM> just a simple knot
[13:59] <NigeyS> looks it, dont think theres much need for a special knot ..
[13:59] <jgrahamc> I agree NigeyS, it's just that I like knots
[13:59] <NigeyS> aha! you're a knot man
[14:00] <NigeyS> my dad can do some crazy knots
[14:00] <NigeyS> knows all their names n stuff :|
[14:00] <W0OTM> jgrahamc: in that case, I invented a new knot just for this purpose and I am knot telling you what it is
[14:00] <NigeyS> lol
[14:00] <jgrahamc> Nooooooo!
[14:00] <fsphil> knot fair!
[14:00] <W0OTM> LOL
[14:00] <NigeyS> boom boom @ phil !
[14:01] <fsphil> jgrahamc, any suggestions on what knot I should use to tie the four cords from the payload?
[14:01] <jgrahamc> In what way are you tying them? Are you trying to tie four cords together?
[14:02] <fsphil> yea, and then the main cord is tied to that
[14:02] <fsphil> I didn't do it last time, not sure what way it was done
[14:02] <fsphil> and I'm rubbish at knots :)
[14:03] <jgrahamc> I'd tie them in two pairs separately so that if one knot fails you've got another pair for the capsule to hang on by
[14:03] <jgrahamc> So you just want a knot for joining two cords of equal size together.
[14:03] <fsphil> ooh cunning
[14:03] <fsphil> so each pair gets tied, and then the main cord ties through those
[14:03] <hibby> cheeky double sheet bend ;)
[14:03] <jgrahamc> Yes.
[14:04] <fsphil> thanks!
[14:04] <jgrahamc> You want a bend, as hibby says
[14:05] <jgrahamc> On GAGA-1 the four cords are tied in two pairs using double sheet bends and then the main line going to the parachute has a double bowline at the bottom.
[14:06] <russss> good knot detail
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[14:08] <Elwell> meh, get a copy of Ashleys and do it right
[14:08] Nick change: kd0mto -> DagoRed
[14:09] <jgrahamc> Or use cable ties:-)
[14:16] Nick change: DagoRed -> DagoRed|shower
[14:18] <Dan-K2VOL1> I have Ashley's in PDF form if anyone wants it (shh)
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[14:20] <fsphil> I was going to use duct tape but I thought that a bit unprofessional :)
[14:21] <jgrahamc> I'm using duct tape to keep the lid on.
[14:21] <Dan-K2VOL1> actually fsphil simple knots secured with duct-tape is tried and true
[14:22] <fsphil> I've got duct tape to keep the string attached to the main box
[14:22] <eroomde> DON'T USE CABLE TIES
[14:22] <fsphil> http://imgur.com/a/dQXrc
[14:27] <jgrahamc> I could have sworn cable ties were using for BallastHalo5 to attach the balloon, or am I inventing things? eroomde
[14:28] <jgrahamc> So eroomde with the weather looking ok (so far!) for Sunday, you ok with a launch around 1000 BST?
[14:28] <eroomde> they would have then been wrapped with gaffa
[14:29] <eroomde> cable ties should absolutely not be used in any kind of load bearing capacity on balloons
[14:29] <eroomde> it's dangerous and stupid
[14:29] <eroomde> jgrahamc: should be fine with that time yes
[14:29] <jgrahamc> Cool eroomde, thanks.
[14:30] <jgrahamc> It don't think I've ever heard you "rant" about anything bit of a surprise to hear dangerous and stupid :-)
[14:30] <eroomde> we used them once in something load bearing
[14:31] <Laurenceb_> python question: how can i divide a list of numbers by an integer?
[14:31] <eroomde> we were dangerous and stupid to do so
[14:31] <jgrahamc> Use map: http://docs.python.org/library/functions.html#map
[14:31] <jgrahamc> That was for Laurenceb_
[14:31] <jgrahamc> I shall not use any cable ties!
[14:32] <Laurenceb_> ok...
[14:32] <Laurenceb_> so i have s=[1,2]
[14:32] <eroomde> al the load is carried on a little plastic tooth which is almost bound to fail at -40
[14:32] <Laurenceb_> how do i say divide by 3 ?
[14:33] <jgrahamc> Good point about the tiny tooth.
[14:33] <Upu> fsphil looks like you're the closest to that launch tommorrow
[14:34] <fsphil> Upu, indeed! that's a first
[14:34] <eroomde> using cable ties usually results in something coming down without a parachute, be it a camera or an entire payload or whatever. it's just a really bad thing
[14:34] <jgrahamc> map(lambda x: x / 3, s)
[14:34] <jgrahamc> I've got pretty much everything either screwed, glued (or both!) or tied down with strong cord. Hope it all stays together!
[14:34] <Laurenceb_> where did lambda come from?
[14:34] <Upu> you and me guess I best be available
[14:35] <Laurenceb_> just a random function name?
[14:35] <eroomde> at least the polystyrene box payloads generally have a slightly lower terminal velocity, which is saving grace
[14:35] <Laurenceb_> ok i kind of see, thanks
[14:35] <eroomde> Laurenceb_: no, it's a way of declaring a function on the fly
[14:35] <Laurenceb_> ah i get it
[14:35] <Laurenceb_> neat
[14:35] <jgrahamc> Laurenceb_: it's an anonymous function (called a lambda).
[14:36] <jgrahamc> I could have done something like def divider(x): x/3 and then done map(divider, s), but I don't need another function so I just use a lambda.
[14:36] <eroomde> you could define 'divide_by_three()' and do map(divide_by_three,s)
[14:36] <jgrahamc> What languages do you work with normally Laurenceb_ ?
[14:36] <Laurenceb_> c
[14:36] <eroomde> i have just complete repeated jgrahamc :)
[14:36] <Laurenceb_> and matlab
[14:36] <Laurenceb_> :P
[14:37] <jgrahamc> Thank goodness eroomde that someone's checking my work!
[14:37] <jgrahamc> IIRC Laurenceb_ matlab does have something like lambdas called anonymous functions.
[14:38] Action: Laurenceb_ is generally not that amazing at remebering this stuff
[14:38] <eroomde> i'm having a bit of a love affair with functional programming atm
[14:38] <jgrahamc> Also, follow what eroomde says because he has better function names.
[14:38] <jgrahamc> What are you coding in eroomde ?
[14:38] <Laurenceb_> those words are long, so it must be good
[14:38] <eroomde> well, so Actuall Stuff in Haskell and also working through the structure and interpretation of computer programs
[14:39] <eroomde> just doing the exercises, which have been enlighening
[14:39] <jgrahamc> That book is brilliant.
[14:39] <eroomde> well, to someone who's never done any formal compsci anyway
[14:39] <eroomde> it really is!
[14:39] <jgrahamc> It was summer reading before I went to Oxford and I remember thinking it was just amazing.
[14:39] <eroomde> I've been tempted to get another couple of copies
[14:39] <eroomde> a copy in every room
[14:40] <jgrahamc> Full text is online as well: http://mitpress.mit.edu/sicp/
[14:40] <eroomde> yep
[14:40] <eroomde> I occassionaly dive into that if i'm bored at work
[14:40] <eroomde> I haven't yet got to meta-circular evaluators but their name alone is enough for me to keep reading
[14:40] <Laurenceb_> jgrahamc: you're at oxford ?
[14:40] <jgrahamc> I was at Oxford quite a long time ago...
[14:41] <Laurenceb_> heh me too
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[14:41] <jgrahamc> I was there from 1986 to 1992.
[14:41] <Laurenceb_> ok - i graduated 2008 - physics
[14:41] <Laurenceb_> what college?
[14:41] <jgrahamc> LMH
[14:41] <jgrahamc> You?
[14:41] <eroomde> Laurenceb_: as an asside it might be faster and also more 'pythonic' to do a list comprehension
[14:41] <eroomde> so [x/3 for x in s]
[14:41] <Laurenceb_> Hughs
[14:42] <Laurenceb_> LMH is a nice site
[14:42] <jgrahamc> When I was there Hughs was all women.
[14:42] <Laurenceb_> haha yeah
[14:42] <eroomde> it still is
[14:42] <Laurenceb_> oi
[14:42] <eroomde> Laurenceb is Laurie Nceb
[14:42] <jgrahamc> One of the reasons I chose LMH was because of the river etc. One of the few Oxford colleges with proper grounds and river.
[14:43] <jgrahamc> Got locked in St. Hugh's one night after visiting a girlfriend and had to sleep in a bath!
[14:43] <Laurenceb_> Hughs grounds is nice - you hardly hear the traffic noise
[14:43] <Laurenceb_> lmao
[14:43] <jgrahamc> Bloody cold.
[14:43] <Laurenceb_> *are
[14:43] <Laurenceb_> eroomde: im hacking together rally bad code here - dont really care
[14:43] <Laurenceb_> its just proof of concept
[14:44] <eroomde> but list comprehensions are so beautiful!
[14:44] <jgrahamc> eroomde has a good point though, I'm no Python expert and it is better to use language idioms as others will be able to read and understand your code more easily.
[14:44] Action: Laurenceb_ will post his code for everyone to laugh at
[14:44] <jgrahamc> Also as eroomde says, list comprehensions rule!
[14:44] <jgrahamc> Just make sure Laurenceb_ that it's in a pastebin so we don't get a repeat of the fiasco the other day
[14:44] <eroomde> what was the fiasco?
[14:45] <Laurenceb_> http://pastebin.com/id0ejUMV
[14:45] <Laurenceb_> haha yeah im not going to do that
[14:45] <jgrahamc> Someone, posted their code here and line by slow line it appeared.
[14:45] <eroomde> oh there's a cute command line pastebin tool that lets you do something like 'cat mymodule.py | pastebinit' and prints the url in response
[14:45] <jamestosh> hi all, just to let you know the skypod launch will DEFINITELY take place tomorrow at 11am from Newton Stewart
[14:46] <eroomde> jgrahamc: ouch. time for some gentle education methinks
[14:46] <eroomde> jamestosh: ok cool, thanks for telling us and do please email it to the ukhas list
[14:46] <eroomde> best of luck!
[14:46] <jgrahamc> Someone, think it was jonsowman killed his conneciton.
[14:46] <jgrahamc> Good luck jamestosh
[14:46] <jamestosh> yeah one of my group has already put it on the mialing list
[14:47] <jamestosh> if anyone near the area could listen in that would be great
[14:47] <fsphil> will have a go
[14:47] <eroomde> i can try and listen from cambridge but I doubt we'd get much
[14:48] <jamestosh> hopefully you do
[14:48] <fsphil> that'd be cool
[14:48] <jamestosh> and anyone else who is listening in
[14:50] <jgrahamc> Poo. The hourly predictor and the predictor on habhub have started disagreeing with each other again.
[14:51] <eroomde> jgrahamc: just read you integration test blog post. Exciting stuff!
[14:51] <eroomde> and excellent to be ready to fly fully five days before scheduled launch
[14:51] <eroomde> gah, this looks like a nasty bug
[14:52] <jamestosh> the skypod stuff? or was that to some1 else
[14:52] <jgrahamc> I think jonsowman told me the other day it was some sort of caching problem and some cache had to be cleared
[14:52] <eroomde> i don't really have time atm to sit down and go through it all (house move this week) but I shall brew up a good tea pot and get an entire pack of crumpets and see if I can't figure out what's upsetting it
[14:53] <eroomde> it might be worth rebuilding the hourly predictor ontop of the latest predictor branch
[14:53] <jgrahamc> It was kind of depressing last night just before midnight when things weren't working. Particularly worrying was the RTTY garbling.
[14:53] <eroomde> i cleared the cashe last time, i am sure
[14:53] <eroomde> that's what I thought would fix it
[14:53] <jgrahamc> I have the Lassen IQ sending TSIP into pin 6 on the Arduino and using software serial. Looked like I was just getting too many interrupts during RTTY send which was causing the timing to spread out horribly.
[14:54] <jgrahamc> This is where logic analyzer/oscilloscope was handy
[14:55] <eroomde> yes, we had such a problem back when using PICs for flight computers. especially as we did pulse shaping on the input to the ntx2, which required 16 interrupts per frequency shift
[14:55] <Laurenceb_> ive precessed thew tsip inside an isr before
[14:55] <Laurenceb_> there code for that on the wiki
[14:55] <eroomde> there were just too many interrupts floating around
[14:55] <Laurenceb_> software serial ?!
[14:55] <Laurenceb_> eeeeekk
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[14:56] <Laurenceb_> no wonder it doesnt work :P
[14:57] <SamSilver> flush
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[14:59] <Laurenceb_> hard to see how you could make it work if you want two serial ports
[14:59] <Laurenceb_> rx - gps, tx - pc?
[14:59] <griffonbot> @LVL1WhiteStar: Video time! Have a peek inside SB1 to see how we interact with and program it - thicket of @FTDIChip cables http://bit.ly/euQCJl #arhab [http://twitter.com/LVL1WhiteStar/status/55283488844300288]
[15:01] <SamSilver> oooohhh flashing
[15:01] <Laurenceb_> male or female flasher?
[15:01] <SamSilver> speed ball flashing blue
[15:02] <Dan-K2VOL1> har har
[15:03] <SamSilver> ooHH top off as well
[15:03] <Dan-K2VOL1> yep, it's quite revealing
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[15:04] <SamSilver> * reaching for my probe
[15:04] <jgrahamc> Bloody browser crash
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[15:09] <jgrahamc> eroomde: do you know if jcoxon is sending you the hellschreiber passenger for my flight?
[15:10] <eroomde> He's not communicated with me about it
[15:10] <eroomde> he might be coming up himsel
[15:12] <jgrahamc> Apparently he's on call this weekend so can't come. I told him to either ship it to me or you.
[15:12] <eroomde> ah ok. well, I have yet to hear anything
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[15:14] <Upu> Location of flight IMPORTANT: Attach a copy extract of 1:50,000 Landranger OS Map showing site marked CLEARLY.
[15:14] <Upu> wheres best to get these online ?
[15:14] <Upu> Also can someone check my maths 54.177639, -1.40850
[15:14] <Upu> = 54° 10' 39.4998" -1° 24' 30.6"
[15:14] <Dan-K2VOL1> they seem to care much more about ballooning in the UK govt than here
[15:15] <Upu> = Eastings 438603 Northings 475942 SE 38603 75942
[15:15] <Dan-K2VOL1> in the us
[15:15] <jgrahamc> Divide surface area of US by balloon diameter then do the same for UK :-)
[15:16] <Dan-K2VOL1> ah yes, makes sense, one balloon flight could easily cross the country
[15:16] <NigeyS> we feed the ocean latex and polysterene :|
[15:17] <russss> I've decided Hellschreiber should probably be a German industrial electro band.
[15:17] <Dan-K2VOL1> sounds good russss
[15:17] <russss> seems like the name is free too. http://www.last.fm/music/Hellschreiber
[15:18] <Dan-K2VOL1> NigeyS, actually I've been wanting to look into biodegradeable foam and film for balloons
[15:18] <Dan-K2VOL1> well, ZP balloons
[15:18] <NigeyS> oo now there's an idea
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[15:19] <Dan-K2VOL1> I feel a bit bad about using the non-renewable helium to litter the ocean with great sheets of non-biodegradeable plastics and foam
[15:20] <NigeyS> oh aye, and it all mounts up to
[15:20] <Dan-K2VOL1> I've tossed 3 ZPs in the atlantic thus far
[15:20] <NigeyS> :o
[15:20] <Dan-K2VOL1> SNOX I, III, and IV
[15:20] <NigeyS> ah yes
[15:21] <Dan-K2VOL1> I presume III landed in the ocean, it was last triangulated near NYC heading eastbound, transmitting "GPS FAILED"
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[15:23] <NigeyS> i'd put money on it
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[15:24] <russss> SpaceX announced the Falcon Heavy - 54,000kg to LEO
[15:24] <SpeedEvil> Woo.
[15:24] <SpeedEvil> My guess was right.
[15:24] <jgrahamc> Tragic last message Dan-K2VOL1
[15:24] <russss> SpeedEvil: yeah, but the payload capacity is *double* that predicted
[15:24] <SpeedEvil> :)
[15:24] <NigeyS> something like "HELP I'M LOST" would have been nicer hehe
[15:25] <russss> "1/3rd as much cost as a Delta V Heavy with double the payload capacity"
[15:25] <Dan-K2VOL1> haha yeah for later flights we changed it to MAYDAY!
[15:25] <NigeyS> what could they possibly fit in that that's going to weigh 54ton ? :|
[15:25] <Dan-K2VOL1> and printed the broken GPS strings out
[15:26] <jgrahamc> Multiple things NigeyS
[15:26] <Dan-K2VOL1> something much smaller to mars
[15:26] <jgrahamc> Like two satellites at once
[15:26] <NigeyS> hmm i guess
[15:27] <Dan-K2VOL1> wow that's double the payload of the Space Shuttle
[15:27] <russss> built to NASA human rating standards
[15:27] <Dan-K2VOL1> ah school field trips to the space station!
[15:28] <russss> Mars sample return possible
[15:28] <russss> with that size
[15:29] <jonsowman> eroomde: ping
[15:29] <mattltm> Hi all :)
[15:29] <eroomde> jonsowman: pong
[15:29] <eroomde> jonsowman: tell me about helium
[15:30] <jonsowman> what about it?
[15:30] <eroomde> well, is there any at churchill?
[15:30] <eroomde> or rather, do you have the situation in hand?
[15:30] <jonsowman> nobody seems to know really, there are a couple of half-filled bottles as far as I can tell
[15:30] <jonsowman> I emailed several days ago asking if it's OK to have a couple more bottles delivered
[15:30] <eroomde> because but not mentioning it to me i absolved myself of all responsibility
[15:31] <jonsowman> but haven't been explicitly told it's OK to have it delivered
[15:31] <jonsowman> John Moore just replied saying we're OK to launch and thanks for the risk assessment, but didn't say anything about helium delivery
[15:31] <eroomde> email gavin.bateman@chu.eng.cam.ac.uk
[15:32] <jonsowman> chu.eng?
[15:32] <eroomde> whoops sorry
[15:32] <eroomde> chu.cam
[15:32] <Dan-K2VOL1> chu.food
[15:32] <jonsowman> I did cc him on the original email
[15:32] <Dan-K2VOL1> :-P
[15:32] <eroomde> I'll assume you have it in hand unless you tell me otherwise, but be advised I am moving house weds and thurs so basically don't have time to do anything to help
[15:33] <jonsowman> righto
[15:33] <jonsowman> BOC deliver next day I'm told?
[15:33] <eroomde> yep
[15:33] <eroomde> 95% of the time
[15:33] <jonsowman> fine
[15:33] <jonsowman> I wanted to phone today but waiting for Chu to confirm
[15:33] <jgrahamc> It's true that not having helium would put a damper on things :-)
[15:33] <jonsowman> will email Gavin now
[15:33] <eroomde> and not on saturdays
[15:34] <russss> he said that the first Falcon Heavy launch will not have a primary payload
[15:34] <russss> we should blag some space on it.
[15:36] <NigeyS> jonsowman, on your telem string, what is RSSI ?
[15:36] <Dan-K2VOL1> yes, put a few balloon flight computers on board and see how they do
[15:36] <jonsowman> NigeyS: received signal strength
[15:37] <NigeyS> got ya, all working well so far ?
[15:37] <jonsowman> yep :)
[15:37] <jonsowman> we've changed our transmission regime around a bit
[15:38] <jonsowman> 2 x 300 baud packets, each transmitted twice, then a 50 baud packet with only positional data
[15:38] <NigeyS> ah okies, i shall make sure i have plenty of coffee for your early early early..(did i mention early?) launch
[15:39] <jonsowman> haha
[15:39] <Randomskk> jonsowman: does the only-positional-data one transmit ,,,,,, for the other fields?
[15:39] <Randomskk> or like
[15:39] <Randomskk> I wonder if that's going to mess up habitat
[15:39] <jonsowman> yes ,,,,,,,,,,
[15:39] <jonsowman> it breaks spacenear as well at the moment
[15:39] <jonsowman> well, it displays "NaN"
[15:40] <Randomskk> hehe
[15:40] <NigeyS> eek
[15:45] <fsphil> just the one 50-baud packet jonsowman?
[15:46] <jonsowman> fsphil: yep
[15:46] <fsphil> can you stick on a few extra $$'s at the beginning?
[15:47] <fsphil> or even better, a few 0x00's
[15:47] <Matt_soton> surely UUUs would be better?
[15:47] <Randomskk> wouldn't 0x55 or something be more useful?
[15:47] <Randomskk> yea, 'U'
[15:48] <fsphil> true, but it doesn't look as good :)
[15:49] <eroomde> j
[15:49] <eroomde> whoops
[15:50] <benoxley> adam: your name should be randomssk
[15:50] <benoxley> just sounds better
[15:50] <NigeyS> lol
[15:50] <benoxley> according to matt
[15:50] <Randomskk> he's right, you can't pronounce randomskk
[15:50] <Randomskk> tell my eleven year old self that
[15:50] <benoxley> lol
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[15:51] <Matt_soton> well Us added
[15:51] <russss> "much closer to 10 than 4" Falcon Heavy launches per year
[15:51] <NigeyS> 10 ?
[15:51] <NigeyS> theyre in dreamland
[15:52] <Dan-K2VOL1> well if it's as cheap as they say it is
[15:52] <Dan-K2VOL1> they'll have customers
[15:52] <russss> he says they need ~4 launches per year to maintain the $1000/lb price point
[15:52] <NigeyS> sceptical, remember theyre a commercial company, it does them good to say "10" as opposed to "4"
[15:52] <Dan-K2VOL1> true
[15:53] <russss> he basically said "you have me on tape saying this"
[15:53] <Dan-K2VOL1> however it's also much better to exceed predictions than fall short
[15:53] <NigeyS> agreed also
[15:53] <Dan-K2VOL1> look at Apple, it's busted sales prediction on all those product launches
[15:53] <Dan-K2VOL1> and the stock goes up up up
[15:53] <SpeedEvil> Plus - many of the costs will be fixed.
[15:53] <SpeedEvil> Not nearly as many as shuttle.
[15:54] <SpeedEvil> But making it in volume will lower the costs.
[15:54] <SpeedEvil> It's pretty awesome to consider that it could launch a hundred people for around a million each.
[15:55] <Dan-K2VOL1> they've got that so well SpeedEvil, their use of the same engine on all the rockets really gives them the economy of scale, they're making merlin engines like legos
[15:55] <russss> the advantage with Falcon Heavy is that it uses the same tooling as Falcon 9, so they can share the costs between them
[15:55] <SpeedEvil> yes.
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[15:55] <SpeedEvil> (assuming a hundred people plus lifesupport)
[15:55] <hibby> we're intreagued, because it'll make cubesats really cheap
[15:55] <SpeedEvil> You could of course launch around a thousand people without, but there would be less demand.
[15:55] <russss> and he said the new uprated Merlin engine is easier to mass-produce
[15:56] <Dan-K2VOL1> I had a chance to tour the factory after their first succesful falcon 1
[15:56] <SpeedEvil> Awesome.
[15:56] <Dan-K2VOL1> got to turn a bolt on the merlin that was supposed to go on the second
[15:57] <SpeedEvil> A hundred million is a lot of money.
[15:57] <SpeedEvil> It's not however that much money that someone might not consider investing 2-3 launches to get a really shiny space hotel.
[15:57] <russss> he just mentioned they're working with NASA on the Falcon XX - 150 tonnes to LEO
[15:57] <russss> concept development
[15:57] <SpeedEvil> russss: Does it use SSMEs? :)
[15:57] <russss> hah, I doubt it.
[16:02] <Dan-K2VOL1> sssmes are efficient as hell, but too fragile to be reliable without a lot of maintenance
[16:02] <Dan-K2VOL1> for reuse
[16:05] <SpeedEvil> yeah.
[16:07] <W0OTM> Hello World
[16:13] <SamSilver> welcome W0OTM
[16:14] <mattltm> Hi W0OTM
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[16:21] Action: Laurenceb_ is getting ver confused by python
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[16:21] <Laurenceb_> accel_mean=accel_mean+asarray(accel)#add onto the mean
[16:21] <Laurenceb_> accel_mean+=asarray(accel)#add onto the mean
[16:21] <Laurenceb_> why would the first one work and not the second?
[16:22] <Laurenceb_> accel_mean=array([0,0,0]) is how its initialised
[16:22] Nick change: DagoRed|shower -> DagoRed
[16:25] <jgrahamc> Laurenceb_: not obvious, but here's the answer: http://stackoverflow.com/questions/2347265/what-does-plus-equals-do-in-python
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[16:27] <Laurenceb_> http://pastebin.com/fYpjGUjp
[16:27] <Laurenceb_> line 68
[16:27] <Laurenceb_> oh hang on - its outputting [[ -27 -27 -27][ 140 140 140][17151 17151 17151]]
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[16:31] <NigeyS> hey Zuph
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[16:33] <fsphil> home sweet home
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[16:39] <griffonbot> @jgrahamc: RT @LVL1WhiteStar: Video time! Have a peek inside SB1 to see how we interact with and program it - thicket of @FTDIChip cables http://bi ... [http://twitter.com/jgrahamc/status/55308623995346944]
[16:41] <Laurenceb_> oh got it - transpose
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[17:04] <SamSilver> bbl
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[17:05] Nick change: stilldavid_ -> stilldavid
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[17:16] <NigeyS> connestions seem rather .... unstable today
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[17:20] <fsphil> oddly stable here atm -- *looks at router menacingly*
[17:21] <NigeyS> haha shhh dont say things like that out loud
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[17:29] <russss> http://www.spacex.com/falcon_heavy.php
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[17:46] <NigeyS> hi Steve
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[17:46] <RocketBoy> Yo
[17:46] <NigeyS> how's things ?
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[17:47] <RocketBoy> fine - just trying to sort out the random engineering web site
[17:47] <RocketBoy> someone upgraded the OS and lots of bits now don't work
[17:47] <NigeyS> uhoh
[17:48] <RocketBoy> the guy who runs the servers seems a bit slow at fixing iy
[17:48] <RocketBoy> it
[17:48] <RocketBoy> its been down for almost a month :-(
[17:49] <NigeyS> you need a electric cattle prod, tha'll get him into gear ;)
[17:49] <RocketBoy> (well the website
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[17:49] <RocketBoy> is working - but I cant update it)
[17:49] <RocketBoy> yeah a cattle prod seems like a good idea
[17:49] <NigeyS> oh dear
[17:50] <RocketBoy> just looking at other providers
[17:50] <NigeyS> i can recommend 1 or 2
[17:50] <RocketBoy> ?
[17:51] <RocketBoy> tea just turned up - BBL
[17:52] <NigeyS> mm food!
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[17:59] <NigeyS> hey Shuffty
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[18:05] <Shuffty> HEY nigeys.. :-)
[18:05] <Shuffty> Anything exciting happening tonight?
[18:06] <NigeyS> dont think so dude
[18:06] <Shuffty> lol
[18:07] <Shuffty> Ah well - I guess I'll be reading more blogs and thinking of what to do next..
[18:08] <NigeyS> lol
[18:09] Action: fsphil is currently putting the "harmless" sticker on the payload box :)
[18:13] <Shuffty> I'm quite looking forward to seeing if I can pick anything up from the launch tomorrow morning... doubtful from this far south though.
[18:13] <fsphil> with a good clear horizon it should be detectable from a loooong way
[18:14] <Shuffty> [thumbsup] i'll give it a whirl then...
[18:16] <Shuffty> Actually - I could here a signal on 434.650.10 today - very weak, but it did get me all excited... lol
[18:16] <Shuffty> I know I'm sad...
[18:18] <Shuffty> Hey - has anybody integrated a solar cell, for continuous transmition from the payload?
[18:22] <Upu> Shuffty you'll get 24 hours out of a set of Energizer Lithiums with ease
[18:23] <Upu> Mine have done 48 hours in testing and still work fine
[18:23] <Shuffty> Cheers Upu - 2, 4, 6, or 8 batteries?
[18:24] <Upu> 4 AA
[18:24] <Shuffty> :-)
[18:24] <Shuffty> cool - I'll grab myself some online in a min...
[18:24] <Upu> they aren't powering anything like the camera those are purely for the flight computer
[18:24] <Shuffty> Flight computer inc gps etc?
[18:24] <Upu> yep
[18:25] <Upu> did 24 hours at -8 when it was cold
[18:25] <Shuffty> Do you have a blod Upu? :-)
[18:25] <Upu> a blod ?
[18:25] <Upu> http://ava.upuaut.net
[18:25] <Upu> :)
[18:25] <Shuffty> Blog even...
[18:25] <Shuffty> :-)
[18:26] <Shuffty> Oooh, I've read that one to death - my fav so far!]
[18:26] <fsphil> jcoxon flew a solar cell but it wasn't too successful
[18:26] <Upu> thx :)
[18:26] <fsphil> blod is a *much* better name for them!
[18:26] <Shuffty> Only one problem.... can you write some more... update some more... so I have something to do this eveining.. lol :-)
[18:26] <Upu> lol
[18:26] <Upu> yeah what do you want ? :)
[18:27] <Upu> I'm waiting on NOTAMS at the moment
[18:27] <Upu> payload is already to go
[18:27] <Upu> might do something ont he parachute
[18:28] <Upu> Rob gave me some ideas on how to "hang" it
[18:28] <Upu> "Interestingly Im still on the same Energizer Lithiums so they can power the radio for at least 48 hours and I suspect longer."
[18:28] <Upu> from the blog
[18:28] <Shuffty> Got to say, I love the pink gaffa - I've got a few rolls here - I fear I may have to replicate/steal you could scheme (maybe slightly altered!)
[18:28] <Shuffty> your colour scheme... cant type this evening..
[18:29] <Shuffty> Where are you launching from upu?
[18:29] <Upu> no problems with you using me as inspiration :)
[18:29] <Shuffty> :-)
[18:29] <Upu> Well hopefully near York if Rob gets the NOTAM
[18:30] <Upu> if not I'm applying for a NOTAM for a fesitival site near Topcliffe
[18:31] <Upu> otherwise I have to smooch up to the Cambridge lot :)
[18:31] <Shuffty> Oh great somebody near me... well, sort of.
[18:31] <Shuffty> lol
[18:31] <Upu> anyway gtg wife is on the way home need to get food on
[18:31] <Upu> bbl
[18:31] <Shuffty> Bye...
[18:32] <Shuffty> What does bbl mean?
[18:32] <Shuffty> be back later
[18:33] <Shuffty> :-S
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[18:51] <Laurenceb__> yo
[18:51] <NigeyS> yo
[18:52] <Shuffty> yo
[18:52] <x-f> yo
[18:54] <Laurenceb__> mine got tangled
[18:54] <NigeyS> lol
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[19:29] <jonsowman> MrCraig: ping
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[19:39] <MrCraig> hi jonsowman
[19:39] <jonsowman> hiya
[19:40] <MrCraig> you pinged me?
[19:40] <jonsowman> was just wondering, what time are you planning on getting to cambridge on saturday?
[19:40] <MrCraig> I think you told me launch is about mid-day, so I was aiming to be at a near by coffee shop sometime before 11
[19:41] <MrCraig> I can be earlier if needed
[19:42] <jonsowman> so Apex is expected to land about 7.10am, plus an hour for recovery and a couple of hours to recover, grab a coffee, and get stuff for your launch
[19:42] <MrCraig> land at 7.10, wow
[19:42] <MrCraig> that's an early launch
[19:42] <jonsowman> hehe launch at 4.45am
[19:42] <jonsowman> I reckon we can aim for Artemis to be launched a bit earlier
[19:43] <MrCraig> :-) then I'll head down earlier - so you can get off for some deserved afternoon siesta after :-P
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[19:43] <jonsowman> hehe
[19:44] <MrCraig> I picked up the helium today - have a filling device but it's a party balloon filler so likely to be painfully slow
[19:45] <jonsowman> no problem, you can use our launch kit :)
[19:45] <MrCraig> thanks :)
[19:45] <jonsowman> I think we could aim for a launch about 10.30
[19:46] <jonsowman> how much prep time do you think you'll need?
[19:46] <MrCraig> Not having done this before I don't know - but not much. It's a matter of stringing it all together, putting in the batteries, taping up the box and letting it go.
[19:47] <MrCraig> (checking for a signal of course)
[19:47] <jonsowman> okay
[19:47] <jonsowman> so your payload is all assembled etc?
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[19:48] <andrewallan> Hi All.
[19:48] <MrCraig> Yes - a few little details to sort before launch day but they're just putting my number on the box and covering the lense apeture
[19:48] <andrewallan> skypod launch is on for tomorrow at 11am!
[19:48] <jonsowman> MrCraig: great :)
[19:48] #highaltitude: mode change '+o jonsowman' by ChanServ!ChanServ@services.
[19:48] <MrCraig> jonsowman: I could do with a little advice on the stringing up - lengths of string etc.
[19:49] <jonsowman> we have the 20/10 rule of thumb
[19:49] <MrCraig> I have some concern about the expended balloon interfering with the chute or chutes.
[19:49] <jonsowman> 20m of cord between balloon and chute, 10m between chute and payload
[19:49] <gm8oti> andrewallan great, have a working antenna now!
[19:50] <MrCraig> my cord came in 18 meter lengths so I may string up 18/9
[19:50] <jonsowman> MrCraig: in that way, the remains of the balloon fall well payload the payload
[19:50] <jonsowman> MrCraig: yep, that's fine
[19:50] <andrewallan> gm8oti: awesome
[19:50] <MrCraig> also - I have to stitch some fastenings to the top of the chute for the cord, because there's no hole in these and the main tie is sewn right in to the center
[19:51] <MrCraig> but that'll all be done before arriving
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[19:51] Topic changed on #highaltitude by jonsowman!jonsowman@kryten.hexoc.com: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) www.ukhas.org.uk - Skypod Launch ~1100BST 06/04/11 from Newton Stewart
[19:51] <gm8oti> andrewallan but this will be my first go with dl-fldigi so fingers crossed! I'll be on here to report if I detect it anyway
[19:51] #highaltitude: mode change '-o jonsowman' by ChanServ!ChanServ@services.
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[19:51] <jonsowman> MrCraig: good stuff
[19:52] <Lunar_Lander> hello
[19:52] <jonsowman> MrCraig: if we say meet at Churchill at about 8.30, is that OK? too early?
[19:52] <MrCraig> jonsowman: ok - I'll leave the midlands about 7am, which means I should arrive somewhere near by at 8
[19:52] <jonsowman> if you're sure that's alright - I realise it's early!
[19:52] <Shuffty> Hey Lunar
[19:53] <MrCraig> oh 8.30 at churchill - that's fine for me, but I need to let the second car know.
[19:53] <jonsowman> or wherever nearby we can meet you, your choice
[19:53] <MrCraig> and I underestimated that drive - it's about 2 hours :-)
[19:53] <jonsowman> we can use the college bar to prep
[19:53] <andrewallan> gm8oti: dl-fldigi should work - i'm really looking forward to the launch - would you mind saving all your data in a txt file so we can have a look afterwards??
[19:53] <MrCraig> jonsowman: Give me two mins here - I'll quiz google on the drive times for each of us.
[19:54] <jonsowman> MrCraig: no problem, let me know if it's an issue for you
[19:54] <gm8oti> andrewallan yes I'll need to look to see how to do that, shouldn't be difficult. Don't know if there's a buffer limit.
[19:56] <MrCraig> ok, its only an hour and a half for me - but almost two hours for the crawley guys. You think launch is on for about 10:30?
[19:56] <andrewallan> gm8oti: no worries
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[19:56] <jonsowman> MrCraig: I think that's reasonable, given no big setbacks
[19:57] <jonsowman> let's decide more on when you can get there.
[19:57] <jonsowman> the launch will be whenever we've got everything tested, working and ready to do
[19:57] <jonsowman> *go
[19:57] <jonsowman> but at a guess, prep usually takes ~2hours
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[19:58] <jonsowman> I'll be back shortly, let me know MrCraig :)
[19:58] <MrCraig> jonsowman: ok, I'll make the call and see how early they can get there.
[20:00] <gm8oti> andrewallan ok found the save to text file option, it just appends to a big file so I'll do that if I manage to receive any telemetry ;-)
[20:01] <Upu> hey andrewallan good luck, I'm taking an hour or two off work to see if I can pick you up, me and fsphil are closest I believe
[20:01] <gm8oti> Upu and he's heading roughly in my direction (Edinburgh)!
[20:01] <Upu> ah there is someone closer good :)
[20:02] <fsphil> lol
[20:02] <andrewallan> Upu: Wow fantastic! I'm so nervous, really hope we get good data back and I don;t forget to put a memory card in the camera!
[20:02] <Upu> Got your check list in order ?
[20:02] <andrewallan> yeah all sorted
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[20:03] <hibby> Upu: whereabouts are you located?
[20:03] <gm8oti> professional engineers ;-)
[20:03] <Upu> West Yorkshire
[20:03] <andrewallan> we were ready to launch from Monday but waited due to weather
[20:04] <hibby> ah, I'm Glasgow. Tracking from there, with 'my' silly satellite station
[20:04] <Upu> I'll be on a whip, I'll take the Yagi as well
[20:05] <andrewallan> right guys I'm off to bed - up at 5am tomorrow!
[20:05] <andrewallan> wish us luck
[20:05] <Upu> Have a good flight :)
[20:05] <hibby> andrewallan: 5am's brave!
[20:06] <gm8oti> andrewallan good luck guys
[20:06] <andrewallan> hibby: plenty of time to deal with emergencies!
[20:06] <Shuffty> Where are you launching from Andrewallan?
[20:06] <hibby> haha, nice one. Speak tomorrow :).
[20:07] <hibby> i'll have a webcam set up in the ground station, as ever, lol
[20:07] <andrewallan> i am launching the skypod from Newton Stewart in Scotland Shuffty
[20:07] <andrewallan> lol
[20:07] Nick change: hibby -> Hibby
[20:07] <Shuffty> Doh - good stuff - I shall attemot to track from manchester.. lol :-)
[20:07] <Shuffty> *attempt
[20:07] <andrewallan> cheers Shuffty
[20:08] <andrewallan> talk to you tomorrow
[20:08] <Shuffty> Gnight & good luck got yomorrow
[20:08] <Shuffty> ah *tomorrow
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[20:09] <MrCraig> Question - is it difficult to calculate descent rate from payload weight and chute size without actual tests?
[20:10] <fsphil> hmm I wonder if I can get out of work for a bit, I'd be able to get out the yagis
[20:10] <Shuffty> :-)
[20:10] <Dan-K2VOL1> MrCraig you mentioned covering the lens aperture, what do you mean
[20:11] <MrCraig> Dan-K2VOL1: I have put a small cardboard tube on the payload to allow the camera lens to protrude from the box (because it's easier to secure the camera that way) - I plan to put some clear plastic over that tube to sheild it.
[20:12] <Dan-K2VOL1> I'd recommend not covering the opening with clear plastic, most times that people do that on balloon payloads you get frost/fog
[20:12] <Dan-K2VOL1> the lens is OK being exposed to the air
[20:13] <MrCraig> so leave the lens exposed to the air?
[20:13] <Dan-K2VOL1> definitely
[20:13] <MrCraig> ok cool, that makes it easier
[20:13] <Dan-K2VOL1> and that's always nice :-)
[20:13] <MrCraig> :-) thanks
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[20:15] <MNSP> hello all :)
[20:15] <MrCraig> hi mnsp
[20:15] <Shuffty> Hey mnsp..
[20:16] <MNSP> Hey mrcraig
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[20:16] <MNSP> shuffty
[20:16] <MNSP> :D
[20:16] <MNSP> All set for sat mrcraig?
[20:17] <MrCraig> more or less <grin>
[20:17] <MrCraig> lol actually yes, should be all fine for the day, I'm not panicing on anything
[20:17] <Upu> this one launching from Wales ?
[20:18] <MNSP> lol @ MrCraig
[20:18] <MNSP> Errm wales Upu?
[20:19] <Upu> No idea where is the Saturday one launching from ?
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[20:19] <MNSP> theretwo on saturday
[20:20] <MNSP> both from Cambridge, right MrCraig?
[20:20] <MrCraig> yes MNSP
[20:20] <fsphil> isn't there three on saturday?
[20:20] <fsphil> or am I dreaming up flights now?
[20:20] <MNSP> is jameses on sat or sun fsphil?
[20:21] <MNSP> and one tomorrow too I believe
[20:21] <fsphil> ah I'm mixing them up
[20:21] <fsphil> one tomorrow, three at the weekend
[20:21] <fsphil> I knew there was a four in there somewhere
[20:22] <MNSP> LOL, crazy week for HAB followers... hab-spotter(?)
[20:22] <Shuffty> 4 launches in one week - I didn't realise this was so popular...
[20:22] <fsphil> haha
[20:22] <fsphil> and hopefully one the following week
[20:23] <MNSP> ooo, don't know about next weeks one?
[20:23] <fsphil> me :)
[20:23] Action: LazyLeopard shakes his head... It's like busses; none for months and then a whole bunch together.
[20:23] <fsphil> so true
[20:23] <MNSP> Oh nice fsphil, is that what mattltm was speaking about?
[20:23] <MNSP> lol
[20:24] <jonsowman> hehe
[20:25] <gm8oti> Shuffty aren't there more of the Strathclyde ones next week as well?
[20:25] <fsphil> tis this one: http://ukhas.org.uk/projects:hadie
[20:25] <Shuffty> I don't know gm8oti...
[20:26] <mattltm> Hi all :)
[20:26] <MNSP> hi mattltm
[20:27] <gm8oti> Shuffty on the UKHAS upcoming launches page - 11 to 15 April (at bottom of page)
[20:27] <mattltm> hi MNSP
[20:28] <NigeyS> meh
[20:30] <Hibby> gm8oti: there are, aye
[20:30] <fsphil> it's like a hab record or something
[20:30] <Hibby> The idea is that we get the groups to launch two balloons and three payloads simultaneously.
[20:31] <MNSP> wow hibby!
[20:31] <Hibby> one tested a couple of weeks ago has it's own payloads & is carrying skypod mk2, and one is going as high as possible on as small a budget as possible.
[20:31] <gm8oti> all dangling from a string between the two balloons ..... ;-)
[20:31] <jonsowman> I don't think the upcoming launches page has ever been so full
[20:32] <fsphil> nope, def. not
[20:32] <Hibby> at 24km, skypod 2 is released, then at sometime above that the carrier is cut down from the balloon
[20:32] <MNSP> as the seasons turn to spring young mens minds turn to other things... balloons!
[20:32] <fsphil> two trackers?
[20:32] <Hibby> I've no clue how I'm tracking them all
[20:33] <MNSP> :( haven't got my aerial ready
[20:33] <fsphil> stick a 16.4cm bit of wire on the end of some coax :)
[20:33] <MNSP> wanted to try for the one tomorrow but sure wanna for Sat
[20:33] <Hibby> the radio data is going to be same across all payloads, 100b, 7bit, 2stop & 600hz, but I can't realistically track 3 things in different parts of the sky at once.
[20:33] <MNSP> really? yaggis and moxons can be set aside?
[20:33] <gm8oti> MNSP I put together an 8-ele Yagi this afternoon!
[20:34] <MrCraig> fsphil: I'm still planning to run with the flexi antenna - I don't think it's any less flexible than a piece of coax but I'll put some bubble wrap around it to be safe.
[20:34] <fsphil> MNSP, it's not ideal but it will receive something
[20:34] <fsphil> a simple 1/4 vertical will get you something and very easy to make out of coax
[20:35] <MNSP> cool, will give that a go
[20:35] <Hibby> did we not discuss on the mailing list a 5/8 may be better?
[20:35] <MNSP> where did you get the measurements from for the elements gm8oti?
[20:36] <Zuph> I've got an 80 gram quadrafilar helical I'll sell ya the plans for :-p
[20:36] <MNSP> did find some during lunch break but managed to leave the urls at work
[20:37] <gm8oti> MNSP http://www.vk5dj.com/yagi.html
[20:37] <gm8oti> MNSP it's a Windoze calculator, runs fine in Wine, does the sums for the DL6WU Yagi designs
[20:37] <MNSP> and as for the moxon that got recomended to me yesterday or day before, lol, I found I have NO wire coathangers, all mine are plastic
[20:38] <fsphil> typical that!
[20:38] <MNSP> Thank you very much gm8oti
[20:38] <gm8oti> MNSP welcome - they're good designs and they work!
[20:38] <MNSP> had to go and scrounge one on facebook
[20:39] <MNSP> LOL, in fact that is the site I was looking at during lunch :D
[20:40] <gm8oti> MNSP the other ones I've used are by DK7ZB, also work well
[20:43] <MNSP> brb, am sure I have some spare co-ax round here
[20:45] <Hibby> It's that aweome moment when DIY haggis pizza was a brilliant idea :)
[20:46] <fsphil> mmm haggis ;)
[20:50] <MrCraig> my time is up - will be back tomorrow. night all.
[20:50] <fsphil> nite!
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[20:51] <mattltm> night MrCraig
[20:51] <MrCraig> :-)
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[21:20] <Laurenceb__> whats the big deal about spacex
[21:20] <Laurenceb__> falocn9 heavy... and
[21:20] <SpeedEvil> It's substantially more bang for buck.
[21:20] <NigeyS> meh
[21:20] <SpeedEvil> Also doing it with a comparatively tiny infrastructure, compared to NASA.
[21:20] <Laurenceb__> my point is we knew about it for ages
[21:21] <Laurenceb__> why the big announcement today
[21:21] <SpeedEvil> Yeah.
[21:21] <SpeedEvil> Why not?
[21:21] <Laurenceb__> free publicity ++
[21:21] <SpeedEvil> I don't think they'd actually announced they were building heavy. And the crossfeed and uprated engines boost performance lots.
[21:21] Action: Laurenceb__ wants a Falcon XX announcement
[21:21] <Laurenceb__> oh they didnt have crossfeed before?
[21:21] <SpeedEvil> Castlemane could sponsor Falcon XXXX.
[21:21] <SpeedEvil> AIUI no.
[21:21] <Laurenceb__> lmao
[21:22] <Laurenceb__> interesting
[21:22] <Laurenceb__> reusability seems to have been dropped
[21:22] <Laurenceb__> apparently they've had a load of issues with it
[21:22] <SpeedEvil> :/
[21:22] <SpeedEvil> I hope it's remaining as an aim.
[21:23] <SpeedEvil> But it only has a great deal of point if itdoesn't cost you much mass.
[21:23] <Laurenceb__> elon says its a major aim still
[21:24] <Laurenceb__> armadillo were supposed to be trying a stig launch today
[21:25] <Laurenceb__> oh - http://www.parabolicarc.com/2011/04/05/launch-armadillo-rocket-postponed/
[21:25] <Laurenceb__> :(
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[21:35] <Laurenceb__> talking of rockets - i was playing with my n-prize sim code again, if you go three stage with high power rocketry reloads it becomes much easier
[21:36] <Laurenceb__> ~80% mass fraction
[21:37] <Laurenceb__> which is feasilble for diy carbon fibre without and autoclave etc
[21:42] <Laurenceb__> also third stage becomes the satellite
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[21:51] <jcoxon> evening
[21:51] <NigeyS> evening james
[21:52] <Shuffty> Hey James
[21:54] <jcoxon> hey
[21:58] <jcoxon> ping eroomde
[21:58] <SpeedEvil> Laurenceb: yeah - more stages cover a _hell_ of a lot of sins.
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[21:59] <SpeedEvil> Enough, and you can even cope witrh one not lighting. :)
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[22:11] <eroomde> jcoxon: pong
[22:12] <jcoxon> just running throught the logs
[22:12] <jcoxon> i'll send the beacon to jon
[22:12] <eroomde> ok cool
[22:13] <jcoxon> i'm on call over the weekend
[22:13] <jcoxon> would you occasionally listen out for the beacon
[22:13] <jcoxon> am going to put a dipole on it - interested about the range etc
[22:14] <eroomde> ok
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[22:14] <eroomde> unless chasing
[22:15] <jcoxon> oh i just mean once or twice in the flight
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[22:16] <eroomde> ok
[22:17] <jcoxon> hows tricks?
[22:18] Action: jcoxon has to go to the post office after work tomorrow to collect his funcube dongle
[22:18] <jonsowman> :)
[22:18] <jonsowman> eroomde: ping
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[22:28] <Shuffty> Can anybody help me with my shopping - struggling slightly - trying to find a 1.27mm header 2x4 for the lassen iq.
[22:29] <eroomde> jonsowman: pong
[22:29] <jonsowman> eroomde: got 24hour CUED access
[22:30] <eroomde> ah brill
[22:30] <jonsowman> so we can grab the launch kit etc from the lab just before launch
[22:30] <jonsowman> so that makes your life easier :)
[22:30] <eroomde> does that mean i don't have to wake up at stupid oclock?
[22:30] <jonsowman> sorry, we still need you for NOTAM
[22:30] <jonsowman> :(
[22:31] <eroomde> i am on site actually
[22:31] <eroomde> in that i live within 2nm of the launch site
[22:31] <Randomskk> yea, phone them from bed. the night before. :P
[22:31] <eroomde> i'll just be in bed at the time
[22:31] <eroomde> oh you don't need to phone them at that hour
[22:31] <eroomde> ]they're shut
[22:31] <jonsowman> oh really?
[22:31] <eroomde> yup
[22:31] <eroomde> no planes
[22:32] <jonsowman> excellent
[22:32] <jonsowman> I assume we still need to tell them the day before?
[22:32] <eroomde> i spose
[22:32] <eroomde> but meh
[22:32] <eroomde> usually they just say 'we don't care'
[22:33] <jonsowman> haha
[22:33] <Randomskk> also it's not like they've ever, ever cared about who was phoning
[22:34] <eroomde> they don't mind about that no
[22:34] <jonsowman> should I phone on Friday afternoon then?
[22:34] <Randomskk> eroomde: habitat can now parse actual telem submitted to robertharrison.org from dl-fldigi and it ends up in habitat's couch db
[22:34] <Randomskk> getting there
[22:35] <eroomde> awesome
[22:35] <eroomde> jonsowman: can't hurt
[22:35] <jonsowman> eroomde: righto
[22:35] <jonsowman> in which case, we don't need you :) thank you though
[22:35] <jonsowman> enjoy your sleep
[22:36] <eroomde> cheers!
[22:37] <eroomde> ok night all
[22:37] <jonsowman> night eroomde
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[22:44] <Matt_soton> Shuffty: http://uk.farnell.com/samtec/clp-105-02-l-d/receptacle-1-27mm-smd-10way/dp/1667559?Ntt=1667559
[22:44] <Matt_soton> can be cut to 8 way
[22:47] <Shuffty> Doooohhhhh.... why didnt I think of that!!! Thanks so much Matt! Greatly appreciated
[22:49] <Shuffty> Some fun soldering by the looks of it... http://www.flickr.com/photos/jcoxon77/4085916751/in/photostream/
[22:52] <Matt_soton> its reasonably straight forward
[22:54] <Shuffty> We'll see - i'm always up for a challenge anyway...
[22:55] <Shuffty> Your a star for finding it though... cheers1
[22:55] <Shuffty> !
[22:58] <Matt_soton> :) no problem
[23:00] <Shuffty> Hey matt - will this do the trick?
[23:00] <Shuffty> http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=7141230
[23:00] <Shuffty> rs is just around the corner from me..
[23:01] <Matt_soton> it looks higher, so not sure
[23:02] <Shuffty> no worries...
[23:02] <Shuffty> thanks
[23:04] <Matt_soton> yea the ideal one is half the height of the rs one
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[23:11] <Shuffty> found it, but on rs, it's a min of 5pc - don't need 5, so am buying the one you suggested.. :-)
[23:12] <Matt_soton> well whatevers cheapest in the end
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[23:55] <Shuffty> Night all
[23:56] <Hibby> nn
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[00:00] --- Wed Apr 6 2011