highaltitude.log.20091005

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[00:11] <Laurenceb_> http://hasthelargehadroncolliderdestroyedtheworldyet.com/
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[00:26] <natrium> Laurenceb_, no RSS, lame
[00:27] <natrium> nvm, they just didn't link it --> http://hasthelargehadroncolliderdestroyedtheworldyet.com/atom.xml
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[11:22] <RocketBoy> Laurenceb:
[11:25] <RocketBoy> here is the info you require
[11:31] <RocketBoy> Aerotech 54mm motor grains are 47.4mm dia - the liner (phenolic) is 1.4mm thick wall and 50.5mm dia
[11:32] <RocketBoy> cesaroni 54mm reloads have similar dimensions - although the liner is two part - looks like cardboard wraped in plastic (PET?)
[11:34] <RocketBoy> the cesaroni 38mm reloads - the liner is 34.5mm dia and a 0.7mm wall - I didn't get a chance to measure the grain - but suspect its 33.0mm
[11:36] <RocketBoy> all dimensions are +/- 0.1mm as its difficult to measure diameters exactly - because the items aren't perfectly round
[11:44] <RocketBoy> the cesaroni grains had a thickish wrap of cardboard - whereas the aerotech grain wrap is a lot thinner
[11:52] <Laurenceb> sorry was afk
[11:52] <Laurenceb> thanks for the info
[11:53] <Laurenceb> interesting, any idea on the cardboard? 0.5mm?
[11:55] <Laurenceb> a bit bigger than I was hoping
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[12:01] <laurence__> that was odd
[12:01] <laurence__> my laptop just died
[12:01] <laurence__> along with most of the stuff in my house
[12:01] <laurence__> EMP ?
[12:01] Action: laurence__ looks at SpeedEvil
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[12:10] <SpeedEvil> Laurenceb: power failure?
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[15:21] <rjharrison> hi
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[18:30] <rjharrison> evening all
[18:30] <rjharrison> On my way back from London
[18:30] <rjharrison> Tesing out the now free wifi on the train
[18:31] <SpeedEvil> :)
[18:31] <rjharrison> Hey Randomskk you found CUSF yet?
[18:31] <rjharrison> Hi SpeedEvil
[18:31] <rjharrison> Went and delivered the pictures to The Sun today
[18:31] <SpeedEvil> :)
[18:31] <rjharrison> They seem pleased to get all 3.4GB of data
[18:32] <rjharrison> Hoping to go for an altitude attempt on the next good forcast w/e
[18:33] <SpeedEvil> with III?
[18:33] <rjharrison> Yep that's the plan
[18:33] <rjharrison> A sort of soak test
[18:34] <SpeedEvil> this is with the differential pressure stuff and all-up sensors?
[18:34] <rjharrison> I won't be doing the float stuff on the first launch but def. on the subsequent launch
[18:34] <rjharrison> Yep
[18:34] <rjharrison> PWM too for cam rotation
[18:35] <SpeedEvil> neat.
[18:35] <SpeedEvil> you mean to drive a servo?
[18:35] <rjharrison> Yep
[18:35] <SpeedEvil> just asyunchronously, or intelligently pointed?
[18:35] <rjharrison> in the payload box so it should stay nice and warm 9C
[18:36] <rjharrison> and no hard camera exposed for landing
[18:36] <rjharrison> Intelligently
[18:36] <rjharrison> :)
[18:36] <SpeedEvil> do youhavean orientation reference?
[18:36] <rjharrison> I am using CHDK to detect length of USB power pulse to shoot video, 8 pics, 2 pics ot 1 pic
[18:37] <rjharrison> ahh no not in direction north south east west
[18:37] <SpeedEvil> ah - I see.
[18:37] <rjharrison> but I do have up, horizon or down by 1 degree at a time
[18:38] <rjharrison> I'm planning on a few moving camera video shots to et balloon and ground
[18:38] <SpeedEvil> pointing hte camera, or a mirror?
[18:38] <rjharrison> But spending the majority of the 2 mins on the horizon
[18:39] <SpeedEvil> Some time pointed down at 45 degrees might be nice to make ariel photos
[18:40] <rjharrison> yep
[18:40] <rjharrison> Good point to do a world pic like natrium did
[18:41] <rjharrison> Just pulling into Doncaser
[18:41] <rjharrison> Doncaster even
[18:41] <SpeedEvil> yeah - that's nice.
[18:41] <SpeedEvil> stable wifi ++
[18:41] <rjharrison> another 20 mins before wakefield
[18:41] <rjharrison> Yep not too bad considering
[18:41] <rjharrison> No tunnels yet :)
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[18:42] <rjharrison> SpeedEvil do you have a radio?
[18:42] <rjharrison> capable of USB
[18:42] <SpeedEvil> No.
[18:42] <rjharrison> I was wondering if you can hear the payloads from bonny Scotland
[18:42] <SpeedEvil> I'm very out of range alas.
[18:43] <SpeedEvil> As far as I can tell, no.
[18:43] <SpeedEvil> I'd need a ~10Km antenna site to pick up most payloads
[18:43] <rjharrison> I get a good signal here in Leeds in my car on a whip
[18:43] <SpeedEvil> I can do 300m - but 10Km is a bit tricky.
[18:44] <rjharrison> Humm you are another few hundred miles further a way
[18:44] <SpeedEvil> the ^2 term starts to bite
[18:44] <rjharrison> Yep
[18:44] <SpeedEvil> the signal strength isn't _that_ much of a problem - a modest yagi could sort that.
[18:44] <SpeedEvil> but can't really get away from curvature
[18:45] <rjharrison> Yep
[18:45] <rjharrison> I'm falling asleep here
[18:45] <rjharrison> been a long day... Up at 5 am
[18:45] <rjharrison> I have to go to 2 funerals tomorrow
[18:46] <SpeedEvil> I'm also falling asleep - and it's been a very short day, during which I've felt like collapsing most of it.
[18:46] <SpeedEvil> :/
[18:46] <rjharrison> One of the guys who works for me died of a stroke ages 62
[18:46] <rjharrison> and the other is of a lady who used to work for us a few years ago
[18:46] <rjharrison> Hey ho
[18:47] <rjharrison> I guess that's life, or the lack of it!
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[18:47] <SpeedEvil> Still getting over losing mum. Well - getting past the immediate loss.
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[18:48] <SpeedEvil> Not fun.
[18:48] <rjharrison> Yep it's weird the parent loss
[18:48] <rjharrison> My wife has lost both of hers
[18:48] <rjharrison> You sort of know it will happen one day but never really think about it till it happens
[18:49] <SpeedEvil> So much 'Oh - I'll ask...'
[18:49] <rjharrison> Yep that is my wifes biggest anguish
[18:49] <rjharrison> to ask all those questions she never thought to ask before
[18:50] <rjharrison> Normally about how she feels and if thay felt like it when they were her age
[18:50] <rjharrison> they
[18:50] <SpeedEvil> The stuff you don't know you might ever want to know. Until it's too late.
[18:50] <rjharrison> Yep that stuff
[18:51] <SpeedEvil> oops - got to put bins out before it finally goes dark. Wave.
[18:51] Action: rjharrison waves back
[18:53] <rjharrison> humm i can get to central europe this w/e
[18:53] <rjharrison> No launch likely :(
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[18:57] <rjharrison> Hi DanielRichman
[18:57] <rjharrison> any sign of the insulation
[18:57] <rjharrison> about to get off the train in 5 mins
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[18:58] <DanielRichman> rjharrison, regrettably none.
[18:59] <rjharrison> oh dear
[18:59] <DanielRichman> :(
[18:59] <rjharrison> just get the crap stuff from B&Q
[18:59] <DanielRichman> yep.
[18:59] <DanielRichman> However Breton claims that it has been ordered.
[18:59] <DanielRichman> I totally agree with you
[18:59] <rjharrison> hotmelt glue and duct tape
[18:59] <DanielRichman> :D
[19:00] <DanielRichman> those two underpin any project
[19:00] <DanielRichman> or the project fails
[19:00] <rjharrison> lol
[19:00] <rjharrison> Right wakefield approaches
[19:00] <rjharrison> bbiab when I get home
[19:00] <rjharrison> bye
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[19:03] <jcoxon> evening all
[19:03] <jcoxon> wow 30 people
[19:04] <Randomskk> hi
[19:06] <jcoxon> hey Randomskk
[19:07] <Randomskk> cusu fair tomorrow, I get to see the cusf stand, heh
[19:08] <jcoxon> hey jontyw russss , going to be able to make hackspace this weds
[19:08] <jcoxon> Randomskk, oooo cool, just started at cambridge?
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[19:11] <sbasuita> jcoxon, how was ghana?
[19:12] <jcoxon> sbasuita, ghana was good, thanks, hard work but i had fun
[19:12] <jcoxon> though am glad to be home
[19:13] <dehuman> <rjharrison> hotmelt glue and duct tape <DanielRichman> those two underpin any project
[19:13] <dehuman> highaltitude stuff too huh?
[19:13] <sbasuita> jcoxon, cool
[19:13] <dehuman> hahaha
[19:13] <sbasuita> dehuman, definitely
[19:13] <dehuman> in NASCAR (american stock car racing) they call duct tape '200 mile per hour tape'
[19:14] <dehuman> oh speaking of which
[19:14] Action: sbasuita is doing a foundation license course in november :)
[19:14] <dehuman> there is this glue called Gorilla Glue and its some awesome sticky hold anything together type general purpose repair glue
[19:15] <dehuman> i have limited experience with it, used it twice, afaik it continued to work (never heard another complaint), friends swear by the stuff
[19:15] <jcoxon> dehuman, duct tape has certainly saved many payloads from destruction
[19:15] <dehuman> well the same company makes a beefy duct tape called Gorilla Tape
[19:15] <Randomskk> jcoxon: that's right
[19:15] <dehuman> so its like uber duct tape
[19:15] <Randomskk> and is also why I'm randomly on and off throughout the day
[19:15] <dehuman> you may want to look into it
[19:15] <jcoxon> dehuman, hehe, need to get some then
[19:16] <dehuman> http://www.gorillaglue.com/tapes.aspx
[19:16] <jcoxon> Randomskk, brings back memories - was a while since i did freshers week at cambridge
[19:16] <dehuman> Duct tape is made for smooth, even, predictable surfaces. How many of your projects can be described that way? ThatÂ’s why we invented Gorilla Tape. Made to stick to rough, uneven, unforgiving surfaces like wood, stone, stucco, plaster, brick and more.
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[19:16] <Randomskk> fresher's "week"
[19:16] <dehuman> wow thats some good marketting right there
[19:17] <jcoxon> yeah
[19:17] <jcoxon> you an engineer?
[19:17] <Randomskk> yup
[19:17] <jcoxon> start on thurs?
[19:18] <Randomskk> technically
[19:18] <jcoxon> hehe
[19:18] <jcoxon> yeah its pretty intense
[19:18] <Randomskk> introductory lectures wednesday though
[19:18] <Randomskk> and departmental signup tuesday
[19:18] <Randomskk> today was meeting with director of studies
[19:18] <Randomskk> I only arrived saturday :(
[19:18] <Randomskk> freshers week was more like freshers weekend hehe
[19:19] <Randomskk> and now I have to work out my timetable
[19:19] <Randomskk> from about four separate documents which also no doubt overlap and/or contradict
[19:19] <jcoxon> hehe, well to university
[19:19] <jcoxon> wellcome*
[19:19] <Randomskk> ha yup
[19:20] <jcoxon> wow i can't spell - to long in lectures for me today
[19:20] <Randomskk> where are you now?
[19:20] <jcoxon> oh i'm at Kings College London
[19:20] <jcoxon> i graduated from cambridge 2 years ago
[19:20] <jcoxon> am in my final year of medicine
[19:21] <Randomskk> oh cool
[19:21] <Randomskk> long course eh :p
[19:21] <jcoxon> indeed, nearly over
[19:22] <jcoxon> well do get involved in CUSF - it'll be really good fun, i'm sure i'll be up in cam soon for a launch or 2
[19:23] <Randomskk> yup, am planning on
[19:23] <jcoxon> Randomskk, i do the pegasus hab missions (in case you didn't know)
[19:23] <Randomskk> didn't know, but also don't know exactly what they are either.
[19:23] <Randomskk> i know what hab stands for, that's about it :p
[19:24] <jcoxon> http://www.pegasushabproject.org.uk
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[19:25] <Randomskk> nice
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[19:52] <SpeedEvil> Welcome back!
[19:52] <jcoxon> hey SpeedEvil
[19:52] <jcoxon> thanks
[19:56] Action: SpeedEvil fails at geography.
[19:56] <SpeedEvil> I thought ghana was just next to ugandah and kenya
[19:57] <jcoxon> hehe, no, tis in the west
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[21:58] <jcoxon_> back
[22:02] <rjharrison> me too
[22:02] <rjharrison> hehe 5 mins
[22:03] <rjharrison> bit pissed
[22:03] <rjharrison> well 3 beeers
[22:03] <rjharrison> which is alot for me
[22:03] <gordonjcp> heh
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[22:03] Action: gordonjcp has had two
[22:03] <gordonjcp> one of which was quite small (330ml) but was 6.odd % AVV
[22:03] <gordonjcp> ABV
[22:11] Action: jcoxon_ is in the process of reinstalling tiger on his very old ibook
[22:11] <jcoxon_> using another mac in firewire target mode
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[22:16] <RocketBoy> jcoxon: - welcome back
[22:18] <jcoxon_> hey RocketBoy
[22:18] <jcoxon_> thanks
[22:19] <RocketBoy> so anything new is the jcoxon world?
[22:20] <jcoxon_> not really
[22:20] <jcoxon_> back and around for quite a while
[22:21] <jcoxon_> got some plans for ballasthalo 3
[22:21] <jcoxon_> how about with you, anything new?
[22:21] <RocketBoy> is the last one still in the tree?
[22:21] <jcoxon_> yeah
[22:21] <jcoxon_> need to go and get that
[22:22] <russss> jcoxon_: cool, see you wendesday :)
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[22:22] <RocketBoy> I did some more work for the Beeb - this time for BBC2 coast - a RADAR project
[22:23] <jcoxon_> russss, cool, will bring some stuff to work on and the info from the last launch
[22:23] <jcoxon_> RocketBoy, oh cool, not hab based then?
[22:24] <RocketBoy> nope - not really - radio I guess - I hope to launch another ballon payload in the next few weeks
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[22:25] <jcoxon_> RocketBoy, its about time we got working on the trans-a
[22:25] <jcoxon_> now that i'm back i plan to kcick some people again
[22:25] <RocketBoy> yeah - I'm working on the HF TX
[22:26] <RocketBoy> at this moment - looking at a class E push-pull PA
[22:26] <jcoxon_> great
[22:26] <RocketBoy> I just need to find the right FET
[22:26] <jcoxon_> i plan to test ballast tanks on ballast halo 3
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[22:27] <jcoxon_> http://www.sparkfun.com/commerce/product_info.php?products_id=9072
[22:27] <jcoxon_> found that to measure the ballast level
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[22:36] <SpeedEvil> http://www.theonion.com/content/video/liechtenstein_successfully_tests :)
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[22:57] <Laurenceb> hi
[22:59] <Sparky68> hi
[23:00] <jcoxon_> hey Laurenceb
[23:00] <Laurenceb> afk
[23:17] <jcoxon_> yay i've fixed my old ibook
[23:23] <SpeedEvil> :)
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[23:36] <jcoxon_> night all
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[00:00] --- Tue Oct 6 2009