highaltitude.log.20151016

[00:01] mbales (~mbales@wsip-98-173-204-203.sb.sd.cox.net) joined #highaltitude.
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[00:10] Amadiro (jonathri@dalvik.ping.uio.no) got lost in the net-split.
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[00:10] uwe_ (~uwe_@dslb-088-067-177-159.088.067.pools.vodafone-ip.de) got lost in the net-split.
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[00:55] <SpacenearUS> New vehicle on the map: 03HORUSLORA - 12http://tracker.habhub.org/#!qm=All&q=HORUSLORA
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[01:45] <DoYouKnow> my gps antenna doesn't work so bad for ads-b
[01:45] <DoYouKnow> I can see the signals
[01:45] <DoYouKnow> they're strong
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[02:39] <mbales> anyone interested Ive put together a real brief write up and visualization from todays flight in texas here: https://www.tracksoar.com/texas-team-flight/
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[03:56] <BeaverOne> mbales_: awesome
[03:57] <mbales_> thanks!
[03:57] <mbales_> i was barely involved, being a oupld thousand miles away
[03:57] <mbales_> couple
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[03:58] Nick change: day_ -> day
[03:58] <BeaverOne> sounds awesome that it performed flawlessly
[04:00] <BeaverOne> i created my first PID Control Loop involving a Servo : https://123d.circuits.io/circuits/1121826-the-unnamed-circuit
[04:01] <BeaverOne> http://pastebin.com/waNN6gPX
[04:01] <mbales_> thanks, im pretty happy wiht how it went
[04:01] <mbales_> very cool!
[04:02] <mbales_> next step, self balancing bot
[04:02] <BeaverOne> :P
[04:03] <BeaverOne> im starting to understand the PID function
[04:04] <BeaverOne> the Servo just needs the Ki (integral coefficient)
[04:11] <mbales_> im surprised how useable that circuits 123d is
[04:19] <BeaverOne> i wish there was shields, and other breakout boards
[04:33] <mbales_> that would be nice
[04:33] <mbales_> i wonder what it takes to make them
[04:40] Nick change: pjm_ -> pjm
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[05:27] <BeaverOne> mbales_: https://smartech.gatech.edu/bitstream/handle/1853/44710/ward_michael_b_201208_phd.pdf
[05:28] <mbales_> nice!
[05:29] <mbales_> Ill have to keep track of this for if i ever pick that project up again
[05:30] <BeaverOne> it goes in depth about how parachuters land
[05:30] <BeaverOne> apparently they do figure eights
[05:30] <mbales_> makes sense if youre aiming for a single point
[05:30] Nick change: fl_0|afk -> fl_0
[05:31] <BeaverOne> this is crazy advanced though
[05:31] <mbales_> yeah, he definitely gets in to a lot of aeronautics
[05:31] <BeaverOne> they're using more than one winch servo
[05:32] <BeaverOne> some crazy fan propelled vehicle
[05:32] <mbales_> more than one servo is neccessary for braking / changing your AoA
[05:33] <BeaverOne> heh, think the 64K of ram on teensy 3.2 will have enough room for all this logic programming?
[05:34] <mbales_> more than likely
[05:39] <BeaverOne> guess it's seriously going to be prototyping
[05:39] <mbales_> oh yeah, starting from scratch is going to be a mountain of work
[05:40] <BeaverOne> can't really expect a high altitude balloon to be able to handle the weight of all this
[05:40] <mbales_> you have 6 pounds to play with
[05:40] <mbales_> my prototype weighted in at about 4
[05:40] <BeaverOne> dang
[05:41] <mbales_> parasail didnt weigh much, and i was using an ardupilot with a 1 watt 900mhz link
[05:41] <BeaverOne> mbales_: i'm definitely going to be ditching this GSM bit, heh, was a fun start
[05:41] <mbales_> yeah, a lot of people start there before someone talks them out of it (hopefully)
[05:42] <mbales_> youll be much happier with APRS or somethign similiar
[05:42] <mbales_> brb dishes call
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[06:08] <mbales_> and done
[06:12] <mbales_> i was hoping pushing the ancient leftovers to the back meant they no longer existed
[06:12] <eroomde> i do that with paperwork
[06:12] <mbales_> haha
[06:12] <eroomde> my desk has a sort of jerasic strata and a pre-cretacious strata and so on
[06:12] <mbales_> does that get moldy too?
[06:12] <eroomde> it can become no longer relevent
[06:12] <eroomde> which is a sort of documentation mould
[06:13] <mbales_> haha
[06:13] <RealBorg> eroomde, you are the archaeologist of your own desk ;)
[06:13] <mbales_> ive discovered a nearly intact TPS report!
[06:13] <eroomde> that said my really specific scientific calculator (the one i've had since i was 9 and my fingers just know without looking) has been lost somewhere
[06:13] <eroomde> somewhere in the mess
[06:13] <RealBorg> documentation is outdated as soon as it leaves the printer
[06:13] <eroomde> and it angers me because i'm naked without it
[06:13] <eroomde> hard to find on ebay too
[06:14] <mbales_> what kind?
[06:14] <eroomde> casio fx-992s
[06:14] <eroomde> i actually bought one from ebay on wednesday
[06:14] <eroomde> final straw
[06:14] <mbales_> gotta love ebay sometimes
[06:14] <eroomde> i can live with ipython when at my computer but i didn't have that on the windows CAD laptop and so it nearly broke me
[06:15] <eroomde> i wish solidworks was available for linux or osx
[06:15] <eroomde> windows could be banished forever
[06:15] <mbales_> that would be magical
[06:15] <mbales_> that and altium
[06:16] <mbales_> oh and keep talking and no one explodes
[06:16] <mbales_> newest addiction
[06:17] <eroomde> :)
[06:17] <eroomde> i have never used altium
[06:17] <eroomde> i don't want to get a dependency
[06:17] <eroomde> there seems to be 'good enough' (for some value of good enough) pcb design in the foss world
[06:17] <eroomde> but nothing comes close for mechanical cad
[06:17] <mbales_> the package wizrd though
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[06:18] <mbales_> just type in the mechanical info from the datasheet and you have a part
[06:18] <mbales_> its ridiculous
[06:18] <mbales_> makes me want to throw eagle / altium into a fast moving fan
[06:19] <mbales_> eagle / kicad
[06:20] <eroomde> yes that's true, making packages is my least favourite thing
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[06:23] <mbales_> its such a chore in eagle
[06:23] <mbales_> id spend an equal time googling to see if someone did it to actually making a part
[06:25] <mbales_> next launch i think im going to do two balloons at once and try to get some footage of a balloon flight from a balloon
[06:25] <mbales_> that should keep me amused briefly
[06:33] <eroomde> sorry net dropped out
[06:33] <eroomde> yes that's fun, provided the balloons don't collide
[06:34] <eroomde> well it's still fun if they do collide, but a different sort of fun
[06:34] <eroomde> i do wonder if my PCBs would actually look different if i didn't do them in eagle
[06:34] <eroomde> if my design style is constrained by the tools
[06:40] <SpacenearUS> New position from 03K6RPT-11 after 036 days silence - 12http://tracker.habhub.org/#!qm=All&q=K6RPT-11
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[06:41] <mbales_> ive also often wondered that
[06:42] <eroomde> can alium copy-paste chunks of layout and schematic?
[06:43] <eroomde> say you have an 8 channel datalogger and want to neatly lay out 1 channel's worth and then just step and repeat
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[06:46] <mbales_> yes
[06:49] <eroomde> ok that's good, because doing that is hateful in eagle
[06:49] <eroomde> https://www.dropbox.com/s/mne0yx96rokj9ka/adccard.jpg?dl=0
[06:50] <eroomde> that caused me greif
[06:51] <mbales_> oh man thats painful
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[06:57] <SA6BSS> oh, k6rpt over China
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[07:10] <tweetBot> @benbrpi: Great article on high altitude balloon launch by @GlebeHS #skycademy @Raspberry_Pi http://t.co/RY8XifPmA6 #ukhas http://t.co/fq3mN6BtyR
[07:11] <fsphil> doing anything with multiple objects in eagle seems horrible
[07:12] <UpuWork> :)
[07:12] <UpuWork> usual Eagle mantra "its ok once you get used to it"
[07:13] <fsphil> think I'll try kicad alongside it. may as well learn both
[07:14] <fsphil> see which one results in fewer rude words
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[07:16] <mbales_> haha
[07:17] <mbales_> hey upu, redid the stuff under the ublox, its now mostly clear of traces and stuff behind it
[07:17] <mbales_> and a mess of vias
[07:17] <UpuWork> COOL
[07:17] <UpuWork> oops
[07:17] <fsphil> XD
[07:18] <mbales_> ordered a test board, well see how to do
[07:20] <UpuWork> the chip antennas on the smaller boards are never stellar performance but they do work
[07:21] <mbales_> sacrifices to make it tiny
[07:23] <fsphil> the chip antennas seem to work better than they should
[07:23] <fsphil> for their size
[07:24] <mbales_> thats because radios are magic
[07:24] <fsphil> dark physics
[07:24] <mbales_> indeed
[07:31] Nick change: michal_f -> michal_f|AFK
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[07:42] <Chimpusmaximus> Almost the weekend at last....
[07:43] <fsphil> finally. it's been months since the last one
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[08:00] <tweetBot> @crispSV: @adamcudworth #HABE launch will be late couple of hours due to GSM backup trackers problem #UKHAS #hamr #hamradio
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[08:05] <ghsbill> Anyone lost a payload? Just hada call from a lady near norwich saying she's got a flashing orange package and chute in her garden...
[08:06] <ghsbill> gotta go teach...
[08:06] <daveake> still flashing now?
[08:06] <daveake> If so it'll be a very recent flight
[08:06] <ghsbill> she called yesterday, so perhaps no longer - am calling her this morning - will update u
[08:07] <ghsbill> bye
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[08:07] <daveake> cool. Get a photo if poss :)
[08:28] <RealBorg> i recently asked if anyone has recovered their payload from the lost&found office yet ;)
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[08:43] <SpacenearUS> New vehicle on the map: 03VK5ARG-1 - 12http://tracker.habhub.org/#!qm=All&q=VK5ARG-1
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[08:47] <SpacenearUS> New vehicle on the map: 03VK5QI_chase - 12http://tracker.habhub.org/#!qm=All&q=VK5QI_chase
[08:51] <tweetBot> @crispSV: @adamcudworth #HABE launch from #Greece #UKHAS
[08:51] <tweetBot> HABE 434.2MHz 50 425 shift 7N1 HABE 434.65MHz 50 850 shift 8N1 MAN 434.3Mhz 50 425 shift 7N1
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[09:28] <michal_f> hello
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[10:01] <astrobiologist> I have "accidentally" bought a variable vacuum capacitor... result of a offer made for a buy it now item on ebay... primarily intended for HF loop but what can I use it for on uhf/vhf as well?
[10:01] <SpeedEvil> It's a capacitor
[10:02] <SpeedEvil> VVT are pretty good caps generally - as long as it has low enough parasitics, in principle, yes
[10:02] <Geoff-G8DHE-Lap> What range of value of capacitance
[10:02] <SpeedEvil> But, a cap that is worthwhile on HF may be too high to be usable on UFH/VHF - even without thinking about the parasitc inductance
[10:03] <Geoff-G8DHE-Lap> VVT are generally for high power where you need a high breakdown voltage as well.
[10:03] <SpeedEvil> yeah
[10:03] <astrobiologist> it is 8pf-1000pf, 1.5kv
[10:04] <SpeedEvil> astrobiologist: nice
[10:04] <Geoff-G8DHE-Lap> 1-8pF would be good for VHF/UHF
[10:05] <astrobiologist> there are some 2nd hand or unsold old stock Comets around for about 100 quid, or ukrainian ex-soviet ones for the same price
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[10:07] <astrobiologist> Geoff-G8DHE-Lap, yes I need to get down to 2pf for 10m even
[10:08] <astrobiologist> here are the predictions from RJELOOP1 for HF bands:
[10:08] <astrobiologist> https://pbs.twimg.com/media/CRS7YQAWcAAjVz-.png:large
[10:09] <astrobiologist> so scratching my head as to how to go to very low pf
[10:09] <Geoff-G8DHE-Lap> Get several and put in series ;-)
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[10:11] <astrobiologist> the Comet shorts out at its maximum end stop, so presumably I could then connect a small cap in parallel, say 2pf. the tuning is very broad in the upper bands so doesn't need to be exact
[10:13] <craag> draw out the schematic and then tell me why that won't work ;)
[10:14] <astrobiologist> if I make a much smaller loop, would it be more optimal for uhf/vhf? or is that a silly idea?
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[10:26] <SA6BSS> there have ben a lot of expriment on magnetic loop on vhf uhf , the max out at about 6m , no use use the higher up
[10:27] <SA6BSS> the 2m halo , seen it on a couple of cars at ham meet http://www.kr1st.com/2mhalo.htm
[10:28] <SA6BSS> http://www.kr1st.com/70cmstack.htm
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[10:29] <craag> halo is just a dipole
[10:29] <craag> bent in a circle
[10:29] <SA6BSS> yes
[10:33] <SA6BSS> the idea of magnetic loops is to make them small 1/10 usuly of the wavelenght, but they will not have as good radiation as a fullwavlengt, on 2m / 70cm the wavelength is allready so short that make a magnetic loop is just going to verry lossy, hard to make and still not as good as a dipole
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[10:39] <astrobiologist> I got some good results on APRS just sticking my magmount diamond whip 5/8th on the metal balcony outside, parallel to the ground (i.e not sticking up)
[10:40] <astrobiologist> so basically horizontal polarisation with the "doughnut" radiation pattern going out sideways
[10:40] <astrobiologist> suits my field of view since I live in a long, narrow alleyway
[10:41] <astrobiologist> I actually managed to open the digipeater and iGate on the roof of UCL this way many times, and also contact ISS
[10:42] <fsphil> I did the ISS packet thing once. Needed about 40 watts
[10:44] <astrobiologist> absolutely no line of sight to UCL so the antenna must be greatly improving my gain even in such a restricted location and 90' to its normal orientation. the balcony I guess functions as two radials
[10:45] <astrobiologist> ISS digipeated down several partial decodes from me on 5W! but never a full one, I must admit
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[10:45] <SpeedEvil> https://www.youtube.com/watch?v=NqdeAo2vuMY Now that looks rather fun.
[10:46] <SpeedEvil> 10*15cm quad, capable of 3.5G
[10:52] <craag> astrobiologist: Partial decodes? aprs is usually all or nothing..
[10:54] <astrobiologist> My callsign was in the ariss logs but not being igated for some reason
[10:54] <craag> ah strange
[10:56] <astrobiologist> I emailed an Irish ham whose callsign often cropped up in the logs and he said u could be partially received even from a handheld. he was using a fully tracking quad and higher wattage
[11:03] <fsphil> I don't believe it would appear in the logs if it's not been igated by the station
[11:03] <tweetBot> @crispSV: #HABE launch from Corinth #Greece. @adamcudworth launching 2 payloads aiming 30Km. #UKHAS #hamr #hamradio #amsat
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[11:07] <astrobiologist> fsphil I'll dig up the email and pass it on.
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[11:10] <fsphil> I wonder how the iss igate would handle a binary packet
[11:10] <fsphil> transmit some images via space station :)
[11:11] <SpacenearUS> New vehicle on the map: 03HABE - 12http://tracker.habhub.org/#!qm=All&q=HABE
[11:14] <astrobiologist> fsphil please let me have ur email and I'll forward it on. it looks like I WAS being digipeated by ISS but for some reason I never made it on to the map. but I was in the iss logs and indeed I was digipeated by other aprs stations receiving iss digipeats
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[11:16] <fsphil> phil@sanslogic.co.uk
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[11:18] <astrobiologist> fsphil I've just forwarded the email from go.vertitech@googlemail.cM
[11:20] <fsphil> looks like he's manually digipeating what he receives from the ISS
[11:20] <craag> not back onto iss freq I hope.. LP
[11:20] <craag> *:P
[11:22] <astrobiologist> anyway it looks like ISS heard me, but I can't hear ISS
[11:22] <craag> :)
[11:23] <craag> rather cool though!
[11:24] <fsphil> I've setup an igate on 145.800 a few times
[11:25] <astrobiologist> give it a go, iss was hearing me even in not very optimal circumstances
[11:26] <astrobiologist> and in more enlightened locales, u could try balloon-to-iss airborne aprs...
[11:27] <fsphil> I've got the advantage here of being near the atlantic ocean
[11:27] <fsphil> on certain passes, the station's footprint covers ireland and not much else
[11:27] <fsphil> less competition to get heard by it
[11:30] <tweetBot> @crispSV: #HABE launch from #Greece #UKHAS #hamr #amsat
[11:30] <tweetBot> https://t.co/Mn4uSRvftC
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[11:53] <BensRPi> anyone in Greece?
[11:57] Nick change: fl_0 -> fl_0|afk
[11:59] <Geoff-G8DHE-Lap> Well Adam Cudworth is hence the flight!
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[11:59] <tweetBot> @benbrpi: Good to see #HABE balloon is away heading towards northeast of Greece #ukhas. https://t.co/IEVV1zhFhH
[12:02] <BensRPi> :)
[12:03] <SA6BSS-Mike> I can see it on greek web sdr
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[12:07] <BensRPi> Hi Mike - which one?
[12:09] <SA6BSS-Mike> sv8rv, but it died just as the signal was getting strong, cant connect again
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[12:10] <cuddykid_work> Hi all, just launched 2 balloons in Greece - had a nightmare as theyve drifted together and tangled - could be in for a long flight across europe
[12:11] <daveake> Oh noit's a Greek tragedy
[12:11] <SA6BSS-Mike> :)
[12:11] <cuddykid_work> not the first greek tragedy
[12:15] <BensRPi> Unlucky
[12:16] <daveake> I've heard of a couple of cojoined flights but in both instances they managed to unravel
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[12:21] <cuddykid_work> there is hope then! Hopefully - if not, will be interesting flight
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[12:23] <daveake> Yeah, try not to invade Turkish airspace :p http://www.bbc.co.uk/news/world-middle-east-34551155
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[12:34] <daveake> cuddykid_work No upload for 20 mins ... are you still receiving ?
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[12:36] <cuddykid_work> yeah its v weak though - can see all radios on waterfall but no decode
[12:36] <cuddykid_work> were moving back to where were based (NE of Athens) and then Ill get out the yagi
[12:38] <cuddykid_work> getting better decodes now - over 19km up
[12:41] Nick change: fl_0|afk -> fl_0
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[12:49] <ntx2> Hello - how do you build a payload which is balanced? When you have it on the ground, it is stable, how to ensure that it will not be unbalanced when suspended in the air?
[12:50] <daveake> there are 2 things here ...
[12:50] <daveake> ... getting the weight balanced ...
[12:50] <ntx2> right
[12:50] <daveake> ... and having it aerodynamically balanced
[12:51] <daveake> So I generally try to get it balanced by putting cameras/batteries and anything else heavy on opposite sides
[12:51] <daveake> and also keep them near the bottom
[12:52] <daveake> As for the aero side, if it has something out on a stick, it's not going to be balanced :p
[12:52] <ntx2> ok...I do not have anything out on a stick :)
[12:52] <daveake> this is good :)
[12:53] <ntx2> The camera is not very heavy also
[12:53] <ntx2> so I think it should be ok then
[12:56] <ntx2> thanks for that info
[12:57] <BensRPi> Good to see HABE tracking is back; although it seems to have a taken a quick trip to Algeria!? Tardis perhaps ;)
[12:59] <cuddykid_work> next 20mins will be crunch time - looks like still attached, expected burst is around 32km
[13:01] <cuddykid_work> tracker rebooted for some reason
[13:02] <eroomde> dare rocket again
[13:03] <eroomde> https://ubideo.com/event/55fbd2176f3d82e3c87c15c3
[13:06] <eroomde> dare to dream
[13:06] <eroomde> dare to dump n2o
[13:08] <SpeedEvil> Tanking and detanking, and making an optimistic press release is a vital part of rocketry.
[13:08] <cuddykid_work> somethings happened - getting huge drift on the radios - looks like its plummeting
[13:08] Action: SpeedEvil crosses fingers.
[13:09] <cuddykid_work> I reckon both balloons have burst, chutes have become tangled and weve got over 2kg plummeting back down
[13:10] <SpeedEvil> Oh dear.
[13:10] <SpeedEvil> cuddykid_work: I raise your earlier comment 'next 20 mins will be crunch time'
[13:11] <cuddykid_work> lol
[13:12] <BeaverOne> what's this DARE Stratos II+ rocket launch about?
[13:12] <eroomde> it's a student group making a big hybrid rocket
[13:12] <eroomde> having a go at launching it in spain
[13:12] <eroomde> they had to scrub a few times over the last few days
[13:12] <eroomde> trying again now
[13:14] <BeaverOne> what altitude are they hoping for?
[13:14] <eroomde> 50km or somehing
[13:17] <SpeedEvil> Short burn time I assume?
[13:18] <craag> 23s burn
[13:19] <SpeedEvil> Oh dear.
[13:19] <craag> 180kNs
[13:21] <SpeedEvil> Looking like the fuel strain guage isn't working.
[13:22] <RealBorg> sending greetings from spain to the iss ;)
[13:33] <mattbrejza> geez just press the launch button
[13:33] <mattbrejza> getting bored here
[13:33] <Laurenceb> hold at 40minb
[13:35] <mattbrejza> 16km^2 parachute lol
[13:35] <SpeedEvil> :)
[13:37] <cuddykid_work> got lots of decodes last min - hopefully can recover
[13:37] <daveake> yeah good chance imo
[13:38] Nick change: fl_0 -> fl_0|afk
[13:38] <SV1NJX> Adam, is flat there, but i think you have a lot of road
[13:41] <Chimpusmaximus> Looks like EE are doing the 100Gb for two months for £10 till xmas again http://shop.ee.co.uk/campaigns/christmas-sim-from-ee
[13:42] <daveake> ah cool - mine ran out
[13:43] <daveake> Used it to upload 60GB of video for a flight :)
[13:46] <Chimpusmaximus> always useful to have
[13:47] <daveake> Yup. And EE 4G is much better than ADSL or FTTC here
[13:47] <daveake> 20/20 average vs 5/0.3 for ADSL or 5/1 for FTTC
[13:48] <Chimpusmaximus> My father lives off his.. no other option when ADSL os 0.5/0.2 on a good day
[13:48] <eroomde> i have three unlimited data
[13:49] <eroomde> but it scans the packets to stop me tethering
[13:49] <eroomde> but it's quite fast
[13:49] <eroomde> so i just socks proxy through another server which encrypts all the laptop packets and i'm away
[13:49] <Chimpusmaximus> I do on mobile, but lost tethering unlimited when i upgraded a while back.
[13:49] <eroomde> had about 10MBit in oxford
[13:49] <Chimpusmaximus> good idea eroomde
[13:49] <eroomde> £20/mo with all the usual texts and voice stuff too
[13:49] <eroomde> not too bad
[13:50] <eroomde> they're about to start heating
[13:50] <eroomde> i presume the n2o
[13:50] <Chimpusmaximus> Used to use loads when living in hotels a few years back.
[13:52] <daveake> I take my myfi thing to hotels ... these days they pretty much all have free wifi but sometimes it's slow and/or broken
[13:58] <Laurenceb> cant tell what language that guy is speaking lol
[13:59] <RealBorg> some hotels actually try to charge a lot for internet
[14:00] <eroomde> Laurenceb: english
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[14:00] <Laurenceb> lol Kim Jong-un
[14:00] <Laurenceb> apparently he logged my ip
[14:01] <Laurenceb> I should stop trolling him
[14:03] <BeaverOne> Laurenceb: https://smartech.gatech.edu/bitstream/handle/1853/44710/ward_michael_b_201208_phd.pdf
[14:03] <BeaverOne> Laurenceb: i'm wondering if that's the sort of idea you implemented
[14:04] <BeaverOne> they're using more than one Winch Servo though for four sets of lines, A.B. brake, and tip
[14:04] <adamgreig> what's the clock on DARE?
[14:04] <eroomde> 15ish
[14:04] <eroomde> mins
[14:04] <BeaverOne> Laurenceb: i implemented my first PID Control Loop of a Servo : https://123d.circuits.io/circuits/1121826-the-unnamed-circuit
[14:04] <BeaverOne> Laurenceb: http://pastebin.com/waNN6gPX
[14:05] <Laurenceb> ah yes, thanks for linking me that
[14:06] <Laurenceb> its very similar to my rogallo code
[14:06] <Laurenceb> but considerably more complex
[14:06] <Laurenceb> basic ideas for wind modelling are the same
[14:07] <BeaverOne> i understand a little more now with figuring out how to get the PID Control Loop working
[14:07] <BeaverOne> but i need to study a lot more to understand what's going on with flight
[14:08] <eroomde> you'll be a lot happier if you tidy up your code a bit
[14:08] <eroomde> it's all global variables and includes in random places
[14:08] <eroomde> that will quickly become unweildy
[14:08] <BeaverOne> eroomde: i had to inject that library into there for autodesk 123d circuits since it's not included by default
[14:08] <Laurenceb> yes why is there a c++ class for a pid controller...
[14:09] <BeaverOne> that'll turn into a #include <PID.h> or the likes
[14:09] <Laurenceb> I wrote a PID controller earlier today
[14:09] <Laurenceb> int16_t a=PRESSURE_P_CONST*error+I+PRESSURE_D_CONST*(Reported_Pressure-old_pressure);
[14:10] <Laurenceb> couple of orders of magnitude shorter :P
[14:10] <BeaverOne> just focus on the setup() and loop() functions, heh
[14:11] <SpeedEvil> ^10 minutes to launch
[14:12] <eroomde> where are you initialising kp and kd?
[14:14] <BeaverOne> eroomde: i made kp and kd 0
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[14:14] <BeaverOne> PID myPID(&Input, &Output, &Setpoint,0,60,0, DIRECT);
[14:14] <BeaverOne> Ki is 60
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[14:18] <eroomde> so it's just using KI?
[14:19] <mattbrejza> i hope someones told them their launch rail is wonky
[14:19] <SpeedEvil> 'Oh bugger, it got into orbit, that wasn't supposed to happen at all'
[14:19] <mattbrejza> lol main camera pointing at it is overheating
[14:19] <adamgreig> more trees than I'm used to seeing right next to the launch rail
[14:19] <adamgreig> excited for ...
[14:19] <adamgreig> oh there goes the stream
[14:19] <adamgreig> ;(
[14:19] <eroomde> t-2mins halt
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[14:21] <BeaverOne> the camera overheated and almost fried out
[14:21] <BeaverOne> eroomde: yes, just KI
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[14:27] <craag> T-1 and stream is dead again :/
[14:27] <mattbrejza> lol no signal
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[14:27] <adamgreig> lol this is familiar
[14:27] <mattbrejza> remember to always check before you fill your balloon/rocket
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[14:28] <adamgreig> they should really have turned off the chat
[14:28] <adamgreig> god it's awful
[14:28] <Laurenceb> kim jung-un is there
[14:29] <eroomde> lost stream?
[14:29] <eroomde> radar no tpsinning
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[14:30] <eroomde> anyone else?
[14:31] <adamgreig> refresh
[14:31] <adamgreig> it's no good at reconnecting itsefl
[14:31] <BeaverOne> eroomde: still working for me
[14:31] <adamgreig> FTS had an issue but fixed now it seems
[14:31] <adamgreig> still held at T-1min
[14:31] <BeaverOne> yeah the power wasn't hooked up to the transmitter
[14:31] <adamgreig> they should really turn off the comments
[14:31] <craag> no stream here - jsut occasional frames
[14:31] <adamgreig> go for launch in t-1min
[14:32] <adamgreig> mark
[14:32] <adamgreig> t-30s
[14:32] <craag> refresh got it back
[14:32] <BeaverOne> 10 aseconds
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[14:33] <adamgreig> nice liftoff
[14:33] <adamgreig> stream broke immediately on liftoff lol
[14:33] <BeaverOne> LIFT OFF
[14:33] <Laurenceb> stream dead
[14:33] <mattbrejza> died, refreshed, reloaded at T-3s lol
[14:33] <adamgreig> 1min of flight OK...
[14:34] <SpeedEvil> That's hitting >>>100
[14:34] <Laurenceb> looks high
[14:34] <adamgreig> 100 what?
[14:34] <mattbrejza> 75 what?
[14:34] <Laurenceb> >9000
[14:34] <adamgreig> seconds since launch mattbrejza
[14:34] <mattbrejza> oh
[14:34] <Laurenceb> wow very high
[14:34] <SpeedEvil> Derp
[14:34] <SpeedEvil> seconds
[14:34] <mattbrejza> anyone else have echoy audio?
[14:34] <craag> comments said 65km?
[14:34] <SpeedEvil> he's calling off seconds
[14:34] <adamgreig> yes.
[14:34] <adamgreig> parachute out
[14:35] <adamgreig> apparently?
[14:35] <adamgreig> would've thought parachute out later
[14:35] <eroomde> drogue maybe
[14:35] <adamgreig> at 50km?
[14:35] <adamgreig> drogue is defo out
[14:35] <craag> main chute at 3km
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[14:37] <eroomde> still no splashdown
[14:37] <eroomde> well no, not if it's coming from >30km under a chute
[14:37] <adamgreig> yea lol
[14:37] <adamgreig> even m2 was a 7min flight
[14:37] <UpuWork> what we streaming ?
[14:38] <eroomde> a rocket launch
[14:38] <SpeedEvil> https://ubideo.com/event/55fbd2176f3d82e3c87c15c3
[14:38] <SpeedEvil> 'large' one to 50km
[14:38] <adamgreig> main's out
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[14:38] <SpeedEvil> (and yes, the stream is a bit broken)
[14:40] <Laurenceb> no shit its spinning
[14:40] <Laurenceb> mastermind at work
[14:41] <Laurenceb> 21km?
[14:41] <Laurenceb> thatd be a bit of an underperformance
[14:41] <chris_99> haha windows xp
[14:41] <daveake> lol Windows error
[14:41] <Laurenceb> lol
[14:42] <adamgreig> oh huh 21km?
[14:43] <adamgreig> I mean the comments are probably full of shit
[14:43] <Laurenceb> yeah not sure i trust them
[14:43] <Laurenceb> its been invaded by trolls
[14:43] <mattbrejza> i thought he said 41km..?
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[14:46] <eroomde> i thought he said 21
[14:46] <mattbrejza> i wasnt paying that much attention
[14:47] <adamgreig> 21 is a sight short of 50
[14:47] <adamgreig> hybrids i guess
[14:47] <adamgreig> wonder if the burn time was on the money
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[14:49] <eroomde> i've not done 'the math' on an ablative-liner lox-kero biprop
[14:49] <eroomde> but it seems like the easyish and obviousish way of getting high alts in a way that's amateur-approchable
[14:50] <eroomde> the math mass-fraction wise
[14:50] <eroomde> but i'd have thought a bit of ilm cooling and an ablative liner and you could make a combustion chamber fairly simply
[14:51] <BeaverOne> eroomde: any issues with me using just Ki for the servo PID loop?
[14:51] <eroomde> yes
[14:51] <eroomde> calling it a PID loop, for one
[14:52] <BeaverOne> what else?
[14:53] <SpeedEvil> ^21km is correct
[14:54] <BeaverOne> SpeedEvil: thought they were attempting 50-65km
[14:57] <adamgreig> they were hoping for 50km
[14:57] <adamgreig> 21km still breaks the european altitude record
[14:57] <adamgreig> (amateur)
[15:00] <eroomde> BeaverOne: well, integral-only control is basically just really bad control
[15:00] <eroomde> for most things
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[15:02] <eroomde> usually it's just used to correct any steady-state errors from a propertional term
[15:03] <adamgreig> eroomde: i thought lox and amateur-approachable were not best bedmates
[15:03] <eroomde> yeah that's just bullshit
[15:03] <eroomde> people get sqeamish about cryo but it's much better behaved than n2o
[15:04] <adamgreig> squeamish is one thing, actually acquiring and being able to use lox and associated plumbing another
[15:04] <adamgreig> it's outrageously easy for us to get a full tank of n2o
[15:04] <adamgreig> it's sold over the counter across the country
[15:05] <adamgreig> cryo n2o seems a fun intermediate
[15:05] <adamgreig> not saying I wouldn't love to be able to use lox
[15:05] <eroomde> i don't see the point of cryo n2o
[15:05] <adamgreig> easily obtained
[15:05] <adamgreig> cryo keeps it single phase
[15:06] <adamgreig> really just need to spin out a little company that can have contracts and buy real things on the side
[15:06] <eroomde> so the single phase thing is good in the plumbing
[15:06] <adamgreig> probably solve some issues. probably create plenty new ones too
[15:06] <eroomde> for mass flow measurements and so on
[15:06] <eroomde> but i don't necessarily think it's either here nor there at the injectors
[15:08] <adamgreig> hmm
[15:08] <adamgreig> do you think one could obtain lox realistically though?
[15:08] <eroomde> liquid-liquid gives you a tougher job atomising
[15:08] <adamgreig> and especially if you had to go out to the states to launch, say
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[15:09] <eroomde> well, assuming you're not thinking like a student (i don't mean that in a derogatory way) consider it's one of the most available cryogenic chemicals
[15:09] <eroomde> and industrial process chemicals
[15:09] <eroomde> you just have to keep stuff clean
[15:09] <eroomde> but you should do that for n2o anyway
[15:10] <adamgreig> I mostly assume acquiring it would involve providing some level of assurance to the supplier that you were above board and legit and so forth
[15:10] <eroomde> cryo itself should be scary - ln2 probably *is* the most used industrial chemical after water
[15:10] <adamgreig> we do have to think like a student a bit
[15:10] <eroomde> yes but a student at an engineering dept
[15:10] <eroomde> which should have no problems handling the stuff
[15:11] <eroomde> what would help a lot would be a site where you can actual test stuff that's slightly reliable
[15:11] <adamgreig> certainly plenty of ln2 around
[15:12] <adamgreig> i remember someone mentioning lox in a sort of "never in your life" fashion around here
[15:12] <eroomde> who?
[15:12] <russss> I think you can just buy it from BOC or whatever, not sure whether they do many checks
[15:12] <adamgreig> ln2 or lox?
[15:12] <russss> lox
[15:12] <adamgreig> how does lhs get ln2?
[15:12] <russss> from http://mansfieldcryogenics.com/ but they only do LN2
[15:13] <russss> BOC is more of a faff, they require in most cases that you rent their storage dewars, they won't fill dewars which aren't theirs.
[15:13] <adamgreig> eroomde: can't remember, it was in the context of juniper's phd
[15:13] <russss> and their delivery fixed costs are high
[15:14] <adamgreig> interesting issues trying to get them to deliver to our current test site too I imagine
[15:14] <adamgreig> and not super duper keen on transporting a load of lox in the back of a car lol
[15:15] <eroomde> you do it in a trailer
[15:15] <eroomde> not too bad
[15:15] <eroomde> well it's worth investigating
[15:15] <eroomde> you know when people here say 'oh my god hab with hydrogen!? - won't it explode?!' and you sigh because they're clueless and annoying and confused and silly?
[15:16] <eroomde> that's sort of how i feel when people fret about lox
[15:16] <russss> might be additional regs for transporting lox though, I'm not sure about that
[15:16] <adamgreig> right, fair
[15:16] <adamgreig> I've never done a hydrogen launch actually, we still can't for non obvious reasons
[15:16] <adamgreig> well also the eminently practical reason of having loads of helium
[15:16] <eroomde> you'd want to get jaime (or whoever it is now) to stick you on a cryo and lox handling course, but it's not actually that dangerous if you just understand what to do and what not to do
[15:16] <eroomde> and clean stuff
[15:17] <eroomde> did i mention clean stuff
[15:17] <adamgreig> lol
[15:17] <adamgreig> we do already for the nitrous
[15:17] <adamgreig> not really clear when things are clean though
[15:17] <eroomde> it will set stainless fittings alight if you leave cutting fluid there
[15:17] <adamgreig> mm
[15:17] <adamgreig> we have an ultrasonic bath filled with ipa
[15:17] <adamgreig> and a brush
[15:17] <eroomde> usually for fittings i would do that (bath)
[15:17] <eroomde> then possibly some 30% peroxide solution
[15:17] <adamgreig> we don't have any 30% peroxide
[15:17] <eroomde> then clean
[15:17] <eroomde> you can buy it
[15:18] <eroomde> in the mail
[15:18] <adamgreig> mm
[15:18] <russss> I would like to burn some stainless
[15:18] <adamgreig> that's how jon got banned from having post to college isn't it
[15:18] <adamgreig> c
[15:18] <eroomde> if you want to dry it well, dry warm nitrogen is effective but possibly lily-guilding
[15:18] <eroomde> (just a bottle of n2 and a heating loop)
[15:18] <eroomde> right i gtg and head to cam
[15:18] <adamgreig> have fun
[15:22] <Laurenceb> there is another way
[15:23] <Laurenceb> I've just been test firing some of these http://www.raketenmodellbau-klima.de/Raketenmodellbau/Motoren-Treibsaetze/Motor-D3-0-6-Stueck-.htm?shop=raketenklima&a=article&ProdNr=0430&t=23&c=712&p=712
[15:23] <Laurenceb> they actually perform better than I expected - sim is saying 110km from the test data
[15:24] <adamgreig> christ
[15:25] <Laurenceb> they are composite propellant D motors :D
[15:25] <adamgreig> huh, apcp?
[15:25] <adamgreig> thought usually that only happened around larger motors
[15:25] <Laurenceb> me too
[15:25] <Laurenceb> I dont think its apcp, I suspect its potassium chlorate/perchlorate from the fuel density
[15:27] <adamgreig> ah ok
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[15:29] <Laurenceb> slightly lower ISP but easier to ignite
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[15:40] <adamgreig> interesting
[15:40] <adamgreig> drogue out early
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[16:08] <darsie> is APCP explosive?
[16:08] <adamgreig> technically no
[16:08] <adamgreig> burns slower than 1m/s
[16:08] <adamgreig> so under the US law at least it's not
[16:08] <adamgreig> in the UK it is regulated as such
[16:09] <darsie> So technically it can't explode.
[16:09] <adamgreig> in the strictest sense of the word, that's correct
[16:09] <darsie> ok
[16:09] <darsie> ofc it can rupture containers.
[16:09] <Laurenceb> apart from the pepcon explosion
[16:10] <darsie> That was AP only, right?
[16:11] <darsie> Strong heating may lead to explosions. https://en.wikipedia.org/wiki/Ammonium_perchlorate
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[16:26] <tweetBot> @crispSV: #HABE mission successfully accomplished #UKHAS #hamr #amsat
[16:26] <tweetBot> https://t.co/fTgWpjimfj
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[16:37] <BeaverOne> eroomde: well, it was just a Servo, and i wanted to have to end at 180 from a starting point of 0
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[16:40] <SA6BSS-Mike> Today I went after M3 that landed after a couple of hours last sunday, it landed some 70km from here. Found it :) https://www.dropbox.com/s/bar99r79eld4iop/IMG_20151016_162900.jpg?dl=0
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[16:42] <astrobiologist> going way back to this morning, I meant wire the 2pf capacitor in IN SERIES
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[16:43] <astrobiologist> what happened to the grekoconjoined balloons in the end?
[16:44] <SA6BSS-Mike> https://twitter.com/jamesbromley/status/655037828448022532
[16:48] <astrobiologist> literally THE Jame Bromley... without a number... early twitter adopter?
[16:49] <astrobiologist> so is that two parachutes in the photo, still tangled? or a parachute and balloon remnants?
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[16:56] Nick change: Upui -> Upu
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[17:10] <astrobiologist> was upui an imaginary number version of upu?
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[17:12] <mattbrejza> most people here would use 'j' for sqrt(-1) ;)
[17:12] <Lunar_Lander> hello
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[17:12] <Lunar_Lander> yea matt and I know why :)
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[17:56] Nick change: Jartza_ -> Jartza
[18:07] <Lunar_Lander> next tuesday we hopefully do our version of the launch readiness review
[18:07] <Lunar_Lander> (i.e. everyone finally comes together to discuss launching)
[18:12] <astrobiologist> animalFLARM - only legal in Sweden
[18:16] <mbales> wat?
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[18:21] <astrobiologist> think leda and the Swan, except as an open ads-b sort of thing... or maybe it is just the product my diseased mind
[18:21] <mbales> haha
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[18:49] <astrobiologist> ZZv+0vi
[18:49] <astrobiologist> sorry - dropped my blackberry but caught it!
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[19:03] <kswtch> now change your password please
[19:04] <mbales> hahaha
[19:05] <Lunar_Lander> XD
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[19:15] <astrobiologist> perils of a real keyboard, catching it will type something!
[19:16] <astrobiologist> if Z=2, v=3 and i=4, explain why ZZv+0vi= 12
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[19:17] <astrobiologist> coming to a scottish higher exam near you soon
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[19:51] <Laurenceb_> I dont think DARE has taken the record from CUSF
[19:52] <Laurenceb_> didnt CUSF launch an Estes rocket from a HAB at >21km?
[19:54] <adamgreig> lol
[19:54] <adamgreig> yea but
[19:54] <adamgreig> don't think there was an altimeter on the rocket?
[19:54] <adamgreig> nova.... 4?
[19:54] <Laurenceb_> well as long at it was pointing upwards
[19:54] <Laurenceb_> think so
[19:54] <adamgreig> pretty sure it was 4
[19:55] <Laurenceb_> I was too busy with exams to notice at the time :D
[19:55] <adamgreig> :P
[19:55] <jonsowman> that is not the cusf attitude
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[20:00] Action: Laurenceb_ has been test firing more Klima motors
[20:01] <Laurenceb_> the ones with 0s "ejection charge" dont actually have a charge
[20:01] <Laurenceb_> they just rely on propellant burn through
[20:01] <adamgreig> lol nice
[20:02] <Laurenceb_> I was worried itd blow my nose cone off
[20:02] <Laurenceb_> no problems there then
[20:03] <Laurenceb_> the nozzle material is interesting too - some sort of resin/clay material
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[20:03] <Laurenceb_> easy to machine - I put a proper bell nozzle with 8 x expansion on one quite easily with a small lathe
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[20:04] <Laurenceb_> def better behaved than Estes nozzle material
[20:05] <chris_99> do you think you'll be able to launch a rockoon soonish?
[20:05] <Laurenceb_> I'm kind of busy with work - its a big project
[20:06] <chris_99> mmm
[20:06] <Laurenceb_> so maybe early next year if things go well
[20:06] <chris_99> cool :)
[20:06] <Laurenceb_> still not sure how well these motors will ignite under vacuum
[20:06] <chris_99> will you be able to receive telemetry from the rocket at apogee or would that be too difficult
[20:06] <Laurenceb_> I'm going to pack the bottom with wax/potassium chlorate/catalyst mix and use vishay "MEPIC" initiators
[20:07] <Laurenceb_> thats a bit of work to set up
[20:07] <Laurenceb_> no telemetry from this - its optically tracked
[20:07] <Laurenceb_> I'm not sure how well this will work - mainly its for debugging the rest of the hardware cheaply
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[20:07] <Laurenceb_> total rockoon cost is ~£9 each
[20:08] <chris_99> wow
[20:09] <chris_99> how do you optically track it? like do you need to be in a similar lon/lat to where the HAB is
[20:11] <Laurenceb_> it doesnt seem to be feasible to use either retroreflectors or LEDs on the rocket
[20:11] <Laurenceb_> unless you use a tracking scope which I ruled out as too tricky
[20:11] <Laurenceb_> but it turns out if you launch in a ~30minute window at dusk/dawn you can track it with a decent DSLR
[20:12] <Laurenceb_> set up the DSLR ~100km east and stick a ~50mm lens on, then shoot continual raw frames with 1s exposure
[20:13] <chris_99> intriguing! does that require being in the same lon/lat area as the HAB though
[20:13] <adamgreig> well if it requires being 100km east then yes..
[20:13] <Laurenceb_> well within a ~50km radius of 100km east
[20:14] <chris_99> ah gotcha
[20:14] <Laurenceb_> so the rockoon goes up into the sunlight and its reflecting several watts of power
[20:15] <Laurenceb_> much more than any LED or retroreflector could hope to manage
[20:15] <adamgreig> hmm neat
[20:15] <Laurenceb_> kind of
[20:16] <Laurenceb_> the limited launch window is also kind of annoying
[20:16] <chris_99> can you work out the apogee from the photos somehow or is that not possible
[20:16] <Laurenceb_> yes, but its poorly constrained in the distance away from camera dimension
[20:17] <Laurenceb_> two cameras would enable very accurate apogee estimation
[20:17] <Laurenceb_> itd work during daylight with a larger rockoon, but then you might as well expend a few grams on a CW tracker
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[20:18] <Laurenceb_> a funky CCD or CMOS imager with deep wells might enable more interesting options
[20:18] <Laurenceb_> you need to pull out tiny contrast changes from the noise
[20:19] <adamgreig> is this at the level where you can't even get a 2g CW tracker on?
[20:19] <adamgreig> horrifying
[20:20] <Laurenceb_> heh
[20:20] <Laurenceb_> I'm optimising at the milligram level
[20:20] <Laurenceb_> burnout mass is about 8.9grams
[20:20] <adamgreig> nice
[20:21] <adamgreig> guess it won't have much in the way of a radar signature
[20:21] <Laurenceb_> this is a bit silly, I've got hooked on the absolute smallest rocket to 100km
[20:22] <Laurenceb_> but as I'm using a clip of estes A10 motor to spin it, this means I can use it to test hardware thats capable of launching much more useful stuff
[20:22] <Laurenceb_> *clip on
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[20:29] <Laurenceb_> I'm a little worried I might create an inadvertent "dyson cyclone" and coat the inside of the motor with solid combustion products
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[20:34] <adamgreig> lol
[20:35] <Laurenceb_> I think there are order of magnitude differences... think
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[20:42] <Laurenceb_> yeah 4 orders of magnitude difference compared to around the nozzle
[20:42] <Laurenceb_> there is significant potassium chloride deposited around the nozzle throat tho
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[20:43] <Laurenceb_> just cut a spent motor in half
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[20:44] <Laurenceb_> acceleration inside small gas vortices is insane, no wonder it works well for vacuum cleaning
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[20:56] <afd> https://www.youtube.com/watch?v=tUPElUFFm1k
[20:57] <Laurenceb_> oooh compound pendulum
[20:57] <Laurenceb_> thats not nice
[20:58] Nick change: BitEvil -> SpeedEvil
[20:58] <Laurenceb_> ooh its going sort of up
[21:00] <afd> That's an old video a Purdue team made, kinda similar I assume to the CUSF launch (except the altitude :)
[21:00] <Laurenceb_> interesting
[21:01] <Laurenceb_> it seemed to wobble a lot as it left the rail
[21:01] <Laurenceb_> but stabilised later
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[21:32] <day> the ublox gps modules support an eeprom to store their config permanently. does this have any practical use? Sending a few commands seems much more sane than investing in an additional chip
[21:35] <astrobiologist> I thought if you ask ubu, he'll add the battery holder to ur ublox when you order it, and then it will remember it's settings whilst the coin battery is good
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[21:37] <day> i dont understand the benefit of it keeping it's config, if a new config takes much less time than the satellite reaquiring anyways
[21:38] <astrobiologist> in most applications, say a handheld gps, it would be expected to remember its settings between power ups
[21:39] <day> astrobiologist: well you would store the config on the uC and resent it when the user powers it up. He wouldnt notice it anyways
[21:41] <astrobiologist> day: but by that token, why bother to have it start up live and send nmea strings immediately? why not get the uC to turn that on as well? I think they were angling for a no-fuss, no-settings chip that starts up immediately on power up
[21:42] <day> astrobiologist: is it possible to receive correct data from it within <1s after turning it on?
[21:44] <astrobiologist> day: yes, as I understand it. the nmea strings start immediately. but it won't be in flight mode unless you send the right config string - or if you sent it before and the battery has been fitted so it remembers.
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[21:44] <day> well the strings surely come instantly. but they will contain wrong data.
[21:45] <day> but w/e to me it looks like a useless feature. and waste of hardware
[21:45] <astrobiologist> day: must admit, haven't powered mine up yet! so I don't know how long it takes to lock on. but pretty quick, I heard
[21:46] <day> well it surely is quick. but you need to send like a handful of strings.. even at 9600 that happens in a fraction of a second
[21:46] <day> and it needs to grap the data from the eeprom as well
[21:47] <astrobiologist> I paid for the battery because I was paranoid. perhaps one serial line on my uC fails but the other doesn't... so perhaps I couldn't send the commands, but it is in flight mode already so my balloon flight can be tracked anyway... and all it cost me is a coin battery
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[21:48] <day> well it surely isnt going to hurt if you use it
[21:49] <astrobiologist> that's the plan. the correct string to send is well-established and on the wiki, but the settings are fairly opaque... the flight mode bit makes sense but why all the rest?
[21:49] <astrobiologist> just set it and sit back... but no harm to have a back-up so you don't always have to set it...
[21:49] <day> i do not understand your question
[21:50] <day> ah you mean in general. well i ve got my init routine with comments. it is simple to adjust a few things. mostly you leave them untouched anyways
[21:51] <astrobiologist> I mean all the other settings in the configuration string to turn on flight mode. they set lots of things, not just flight mode. I don't think anybody knows why all the other settings are the way they are, that is what the ublox windows software suggests. Anyway it works.
[21:52] <day> astrobiologist: the settings are all well documented
[21:53] <astrobiologist> day: if you have a setting-by-setting list then please could I have it to put my mind at rest. I went through it with some colleagues on this IRC settings few months back. we can work out which is which, but why are they the way they are? is this essential to flight mode somehow? no one seems to know exactly
[21:54] <day> hm i wrote the init a while ago i dont remember it in detail
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[21:55] <astrobiologist> like I say, it works, but as I understand it the original string was generated by ublox's own companion windows software, and copy and pasted from there
[21:55] <day> astrobiologist: this is what i send https://paste.debian.net/316294/
[21:57] <astrobiologist> day: thanks. but why enable this, disable that? it doesn't really matter, but I was intrigued
[21:58] <astrobiologist> day: only the flight mode setting should really matter so why the hangers-on?
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[22:00] <Ian_> To cut down on the crud that the Ublox is streaming, to that which you are interested in :)
[22:00] <day> ^. i prefer the mode where it waits for a request
[22:01] <day> were*
[22:01] <day> where
[22:01] <day> idk
[22:01] <astrobiologist> Ian_: but most people transmit the whole spiel, with heading, groundspeed etc etc... that's even the example payload string given in the wiki for habitat
[22:04] <astrobiologist> I think I'll turn in - nite all
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[22:04] <Ian_> That makes for a lot of wasted effort. I haven't got to the Ublox binary bit yet, but that sounds like it offers the best option
[22:04] <Ian_> Gnite
[22:12] <Laurenceb_> http://www.hpcl.psu.edu/Diagnostics%20-%20Schlieren.html
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[23:02] <mbales_> https://www.reddit.com/r/KerbalSpaceProgram/comments/3p07xz/kerballoons_coming_along_nicely/
[23:02] <mbales_> kerbal balloon simulator
[23:02] <mbales_> now i just need a way to import weather data and Id have the best predictor around
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[00:00] --- Sat Oct 17 2015