highaltitude.log.20151022

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[00:42] <BeaverOne> mbales: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19940029489.pdf
[00:43] <mbales> haha, man you are devoted!
[00:44] <mbales> brb gotta run home
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[03:23] <trn> Ian_: Nice. I used mine by borowwing an X.25 pad available to my dad.
[03:24] <trn> Ian_: re your PDP-10 etc. Later it was that 10 that first had arpanet access for me.
[03:25] <trn> Later moved to all VAX stuff in college at FAU, tho cs students had labs full of sparcs as well.
[03:25] <trn> normal workstation was IPX or IPC or something crap and connecting first via pathworks/decnet stuff, later they had multinet on the vax there.
[03:25] <trn> Before the UCX TCP days
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[06:29] <jarod> http://www.flightradar24.com/40.09,-102.28/5 hahhaha awesome :D
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[06:45] <mbales> ha!
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[06:58] <SpacenearUS> New vehicle on the map: 03default_chase - 12http://tracker.habhub.org/#!qm=All&q=default_chase
[06:59] <SpacenearUS> New vehicle on the map: 03today_chase - 12http://tracker.habhub.org/#!qm=All&q=today_chase
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[07:05] <RocketBoy> ere mr Upu sir!
[07:06] <Upu> morning
[07:06] <RocketBoy> hiya
[07:06] <RocketBoy> i think the dare lot are using your photo as a background
[07:07] <Upu> got a link ?
[07:07] <RocketBoy> to one of their promo hots
[07:07] <RocketBoy> hang on
[07:08] <RocketBoy> 2nd photo in the sequence
[07:08] <RocketBoy> http://dare.tudelft.nl
[07:08] <RocketBoy> its a stitch from the josh taylor flight
[07:08] <Upu> heh yeah now with more rocket
[07:09] <RocketBoy> from elsworth 2011
[07:09] <RocketBoy> have they got permision
[07:09] <Upu> of course not
[07:09] <RocketBoy> bs
[07:10] <RocketBoy> I hate that
[07:10] <Upu> I'll send them a mail
[07:10] <Upu> cheers
[07:10] <mbales> tut tut tut
[07:11] <RocketBoy> should get a credit at least
[07:11] <Upu> yeah its poor form
[07:12] <RocketBoy> totally
[07:12] <Upu> but it does seem to happen quite a bit
[07:13] <RocketBoy> time to get litigious
[07:13] <Upu> lol
[07:13] <Upu> I seem to have over my fair share of people nicking stuff off me :)
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[07:14] <RocketBoy> yeah
[07:14] <RocketBoy> bs
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[07:23] <RocketBoy> ttfn
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[10:09] <eroomde> a customer writes to ask if he can bring his labrador into a clean room
[10:10] <eroomde> wasn't the hardest email to reply to
[10:10] <chris_99> haha what the hell
[10:11] <chris_99> unless you have clean room coats for dogs
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[10:12] <day> I'm sorry having to deny your request, but only cats are allowed inside.
[10:13] <chris_99> lol
[10:18] <eroomde> we don't even have a clean room
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[10:30] <gonzo__> no work will get done, everyopne will be fussing the dig
[10:30] <gonzo__> dog
[10:30] Nick change: gonzo__ -> gonzo_
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[10:58] <Ian_> As long as the dog doesn't get the hots sniffing the back end of your latest test piece.
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[11:21] <Oddstr13> "sure you can, but it won't be a clean room anymore!"
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[13:04] <Laurenceb> http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=38577.0;attach=1074210;image
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[13:08] <chris_99> dumb question, could they test if emdrive works in space, by putting one out of ISS
[13:09] <Laurenceb> no
[13:09] <Laurenceb> because it doesnt work
[13:09] <chris_99> heh
[13:09] <Laurenceb> nobody on the forum has been able to make replicate the results
[13:09] <chris_99> oh? i thought a couple of groups and got similar results?
[13:10] <Laurenceb> maybe early on
[13:10] <chris_99> ah
[13:11] <chris_99> https://en.wikipedia.org/wiki/RF_resonant_cavity_thruster mentions Chinese researchers getting some results
[13:11] <Laurenceb> maybe...
[13:12] <chris_99> i'd be curious to see what this programme has to say about it anyhow
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[13:14] <Laurenceb> although on the face of it this isnt utterly insane
[13:14] <Laurenceb> http://forum.nasaspaceflight.com/index.php?topic=38577.msg1437838#msg1437838
[13:14] <Laurenceb> I havent checked the numbers
[13:19] <Laurenceb> horizon will be the typical musical interludes and woooooo
[13:21] <chris_99> oh it's horizon heh
[13:22] <chris_99> it's a shame there aren't more decent science programmes on tv
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[13:32] <eroomde> it will change the 'very nature' of our understanding of the universe
[13:33] <Laurenceb> heh
[13:34] <Ian_> That and cold fusion . . .
[13:35] <Laurenceb> cold fusion is less insane than emdrive
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[13:53] <SpacenearUS> New vehicle on the map: 03N1YIP-11 - 12http://tracker.habhub.org/#!qm=All&q=N1YIP-11
[13:54] <SpacenearUS> New vehicle on the map: 03KB1YOF-11 - 12http://tracker.habhub.org/#!qm=All&q=KB1YOF-11
[14:11] <Laurenceb> http://i.imgur.com/g2Bc6VW.gifv
[14:15] <SpacenearUS> New vehicle on the map: 03td_chase - 12http://tracker.habhub.org/#!qm=All&q=td_chase
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[15:13] <DL7AD> does anyone know which polynomial is used to calculate the UBX protocol CRC?
[15:14] <daveake> There's sample code in the manual
[15:15] <daveake> http://i.imgur.com/MRMAOqw.png
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[15:26] <Laurenceb> well that was different
[15:26] <adamgreig> what hap?
[15:26] <Laurenceb> I just got a quote for a shipping container load of igniters
[15:26] <adamgreig> lol
[15:26] <adamgreig> standard alibaba
[15:26] <Laurenceb> eta: april next year
[15:27] <Ian_> Boom, boom!
[15:27] <Laurenceb> or $350 handling charge to send them air freight
[15:28] <Laurenceb> thats not too bad
[15:28] <Ian_> Those minimum quantities can be a bit of a problem.
[15:28] <Laurenceb> I could buy a few thousand, send via air freight and try to sell them on
[15:29] <Ian_> $350 sounds like a small freight container. Is that just for loading it and not it's passage?
[15:29] <adamgreig> sounds cheaper to just fly to the states, buy a ten pack, fly home
[15:29] <Ian_> Anything to declare sir? Baggage regs!
[15:30] <adamgreig> don't imagine igniters would pose a problem
[15:30] <adamgreig> you can phone up in advance in any event but i've had worse and it's been fine
[15:30] <adamgreig> get more dirty looks for the huge entire rocket than the baggie of pyrotechnics
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[15:30] <BeaverOne> Laurenceb: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19940029489.pdf
[15:31] <Ian_> Worth doing that I guess, to save unexpected discussions at the sharp end.
[15:31] <Ian_> With the name ALARM on the container Adam
[15:32] <Laurenceb> Ian_: $350 is for the air freight
[15:32] <SpeedEvil> Laurenceb: For one?
[15:32] <Laurenceb> container is orders of magnitude more
[15:32] <SpeedEvil> I wonder if they have ever in their history had someone order a container.
[15:32] <Laurenceb> return to states costs much more than $350
[15:32] <Laurenceb> like > twice that
[15:33] <adamgreig> yea but you don't have to buy thousands of igniters
[15:33] <Ian_> How many seats = volume of a freight container - group travel!
[15:33] <Laurenceb> huh
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[15:34] <Laurenceb> $700 -> 10 igniters, $350 -> thousands then resell to get costs back
[15:35] <SpeedEvil> Laurenceb: just work out how to merchandise microSD into space and back
[15:35] <Ian_> I was thinking of 50Kg of thymol but decided that it was all too much effort as I needed less than 5kg for the next few years.
[15:36] Action: SpeedEvil imagines hackerwarehouse.
[15:36] <SpeedEvil> One Beeeelion different drums.
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[15:37] <Laurenceb> the other nice thing is that MJG have told me they are the manufacturer of Cesaroni igniters
[15:38] <Laurenceb> Cesaroni things are not on their stock list, but they can still sell me them
[15:39] <adamgreig> interesting
[15:40] <Laurenceb> I made the mistake of designing my rockoon system around cesaroni igniters without realising I couldnt get them individually
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[16:17] <SpacenearUS> New vehicle on the map: 03KD0NGV-11 - 12http://tracker.habhub.org/#!qm=All&q=KD0NGV-11
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[16:22] <RHASA> How would one find the number of the local ATC to tell them about a balloon launch?
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[16:39] <SpeedEvil> http://epic.gsfc.nasa.gov/ - I can see the cloud that I can see from my house from there.
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[16:47] <Laurenceb> wrong side of the world?
[16:48] <SpeedEvil> you can go back/forward.
[16:48] <Laurenceb> oh
[16:48] <SpeedEvil> It would have been truly awesome in ~1995 or whenever it was supposed to launch
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[16:58] <Laurenceb> so does anyone here want to buy some Cesaroni igniters?
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[17:13] <chris_99> how much are they out of curiousity
[17:14] <Laurenceb> $4 each
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[17:28] <Ian_> I don't suppose that for QA purposes, they could send you a small batch of samples, say TEN?
[17:29] <Ian_> For you to trial to verify suitability for your ongoing scientific project!
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[17:36] <Lunar_Lander> hello
[17:41] <mclane_> Hello LunarLander
[17:41] <mclane_> wie gehts
[17:41] <mclane_> ?
[17:42] <Lunar_Lander> good thanks and you?
[17:42] <mclane_> basst scho
[17:42] <mclane_> (bayerisch = ok)
[17:44] <Lunar_Lander> :)
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[17:47] <Laurenceb> Ian_: they can do samples of 1 or 2, but $350 for hazardous air freight
[17:48] <Laurenceb> maybe I should start a kickstarter
[17:48] <Laurenceb> this is going to get expensive
[17:48] <Lunar_Lander> mclane_, mid november
[17:48] <Lunar_Lander> looking pretty sure by now :)
[17:48] <chris_99> what's special about their igniters?
[17:49] <Laurenceb> they fire off low voltage (<5v)
[17:50] <chris_99> aha
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[17:50] <Laurenceb> ooh hello http://www.sierrafoxhobbies.com/en/24-igniters-kits
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[18:05] <chris_99> wonder if http://easypyro.com/e-match-2m would work 500mA, it does say recommended voltage 6+V though
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[18:15] <mbales> what do you mean?
[18:20] <chris_99> ?
[18:25] <mbales> perhaps i missed the first half of that
[18:26] Nick change: etihwnad_ -> etihwnad
[18:28] <chris_99> yeah, Laurenceb was looking for ones that fire @ <5V
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[18:31] <Laurenceb> the easypro ones are too big
[18:31] <Laurenceb> it also needs to be <3mm diameter
[18:32] <chris_99> ah
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[19:51] <SpacenearUS> New vehicle on the map: 03DL7AD-13 - 12http://tracker.habhub.org/#!qm=All&q=DL7AD-13
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[19:51] <DL7AD> ?
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[19:52] <fsphil> cylon?
[19:52] <M0XIN> Did everyone see that eBay UK discount code that's valid until 22:00 tonight?
[19:52] <M0XIN> 20% off anything, min spend £20, max discount £50
[19:53] <M0XIN> Code: CUKFLASH
[19:53] <M0XIN> (for anyone looking to stock up on Rasberry Pi boards) :)
[19:54] <chris_99> yup, seems nifty
[19:55] <Geoff-G8DHE-Lap> Should Paypal show the discount ? http://couponfollow.com/code/details/2700145
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[20:02] <M0XIN> It's shown just on eBay checkout, so Paypal probably doesn't show the discount
[20:02] <M0XIN> It should just show what you paid
[20:04] <fsphil> what to get. what to get. hmmmmm
[20:06] Action: SpeedEvil ponders setting up an auction for the 50 quid.
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[20:07] <chris_99> haha, good plan
[20:07] <chris_99> does it work >1 time
[20:07] <fsphil> £250 would be best
[20:07] <Miek> nope, just once
[20:09] <Geoff-G8DHE-Lap> Apparently lots of sites have been putting up prices ...
[20:09] <SpeedEvil> http://www.pcadvisor.co.uk/how-to/internet/how-save-20-on-ebay-today-why-you-might-not-want-voucher-3627968/
[20:09] <SpeedEvil> As an aside.
[20:10] <SpeedEvil> Can people who put adverts in the middle of stories for other stories please be shot in the head.
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[20:10] <M0XIN> Yeah, I spotted a few sellers doing that
[20:10] <M0XIN> Just check prices elsewhere before hitting the buy button
[20:10] <M0XIN> I'm stocking up on PLA filament and a few other bits and pieces
[20:11] Action: SpeedEvil ponders.
[20:11] <SpeedEvil> https://www.kickstarter.com/projects/802007522/up-intel-x5-z8300-board-in-a-raspberry-pi2-form-fa?ref=category
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[20:15] <SpeedEvil> http://www.ebay.co.uk/itm/271997623445?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT - how to list ineffectively on ebay
[20:15] <Lunar_Lander> yea
[20:18] <SpeedEvil> http://www.ebay.co.uk/itm/MyFord-Super-7-ML7-Lathe-Cabinet-More-/231724599663? /me resists.
[20:22] <M0XIN> Now is the time to buy that cheap, small Chinese laser cutter you always thought you wanted
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[20:25] <SpeedEvil> I always thought I wanted a 2kW pulsed one that can do aluminium though.
[20:30] <mbales_> thats not a want, thats a need
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[20:44] <M0XIN> Checked my PayPal receipt - the discount is spread out proportionally across the items
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[22:02] <BeaverOne> mbales_: SpeedEvil Laurenceb https://www.flickr.com/photos/100852237@N06/22380902982/in/album-72157660091977635/
[22:02] <BeaverOne> mbales_: SpeedEvil Laurenceb Source : http://pastebin.com/pk65NEKm
[22:04] <mbales_> nice setup
[22:04] <Upu> see better GPS modules :)
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[22:05] <mbales_> haha
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[22:05] <Lunar_Lander> :)
[22:05] <Lunar_Lander> Upu, btw
[22:06] <mbales_> seems like itll probably work
[22:06] <Lunar_Lander> the rocket teacher told us that in only one of ten teams the GPS worked on the cansats
[22:06] <Lunar_Lander> it wasn't ours
[22:06] <Lunar_Lander> and that was strange
[22:06] <Upu> wouldn't expect them to work on a sat ?
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[22:07] <BeaverOne> Lunar_Lander: this gps is supposed to work at or above 40 km altitude
[22:07] <Lunar_Lander> ah cansat was that thing where can shaped payloads were ejected from a small rocket at 1000 m altitude
[22:08] <Upu> or 27km if you got an older one BeaverOne
[22:08] <BeaverOne> hmm, hoping i didn't
[22:08] <Upu> you can query the firmware
[22:08] <Upu> and find out
[22:08] <Upu> its on the UKHAS wiki
[22:08] <BeaverOne> mbales_: Global variables use 4,184 bytes (6%) of dynamic memory, leaving 61,352 bytes for local variables. Maximum is 65,536 bytes.
[22:09] Nick change: fl_0|afk -> fl_0
[22:09] <Lunar_Lander> Upu, so it was well below the altitude limit and I suppose well below the speed limit
[22:09] <BeaverOne> mbales_: just that basic read out from the gps and imu is double the memory resources of the arduino Uno
[22:09] <mbales_> plenty of room left
[22:09] <Upu> well depends, on a rocket possibly not
[22:09] <Upu> and 1000m isn't much time to relock
[22:09] <Upu> though should do it
[22:10] <BeaverOne> mbales_: hoping with all this extra memory i can write up the PID control logic sufficiently
[22:11] <mbales_> i dont think youll have too much trouble cramming it in there. I would really look at adding some sort of dead reckoning, like a magnetometer, otherwise error can build up real quick
[22:11] Nick change: fl_0 -> fl_0|afk
[22:11] <BeaverOne> mbales_: http://www.adafruit.com/datasheets/BST_BNO055_DS000_12.pdf
[22:12] <BeaverOne> it's got 9 DOF, includes the magnetometer
[22:12] <mbales_> ah excellent, didnt catch that part
[22:14] <Lunar_Lander> yeah
[22:14] <Lunar_Lander> Upu, the prime problem was that "our" main experiment was a 10DOF IMU
[22:14] <Lunar_Lander> and they forgot to calibrate it the day before
[22:14] <Upu> yay
[22:15] <Lunar_Lander> for instance, acceleration in the first 5 seconds is 1 G, despite the rocket gains altitude rapidly
[22:15] <Lunar_Lander> so something went wrong there
[22:16] <Lunar_Lander> if you drive an accelrometer outside of the set measuring range, what do they do?
[22:16] <Lunar_Lander> do they report the maximum value of that range or stick to 1G?
[22:17] <mbales_> in my very limited experience they show maximum, or close to it
[22:17] <Lunar_Lander> OK
[22:18] <Lunar_Lander> what I just thought is if they set their sensor to the default range of +/-2G or so and the acceleration exceeded that
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[22:18] <Lunar_Lander> if they used the pololu library you have to edit the library to change the range, will have to ask if they did that
[22:21] <zyp> yeah, usually accelerometers just saturate
[22:23] <Lunar_Lander> thanks
[22:23] <zyp> I managed to saturate a 70g accelerometer once :)
[22:23] <Lunar_Lander> :) what did you do with it?
[22:23] <zyp> rocket
[22:23] <Lunar_Lander> :)
[22:24] <zyp> school project when I went to space tech school, we built sensors for a payload
[22:24] <zyp> my group made an accelerometer board
[22:24] <zyp> we figured 70g should be enough :D
[22:24] <Lunar_Lander> yea
[22:25] <mbales_> i doubt most rockets will see over 15 max
[22:25] <zyp> this one was based on a CRV7 motor
[22:25] <zyp> https://en.wikipedia.org/wiki/CRV7
[22:27] <zyp> IIRC they get around 10km altitude from a burn time less than three seconds
[22:45] <SpeedEvil> Anyone near hastings?
[22:45] <SpeedEvil> http://www.inquisitr.com/2512977/after-china-another-ghostly-floating-city-appears-over-hastings-u-k-sighting-sparks-rumor-cerns-lhc-has-opened-doorway-to-parallel-universe-video/
[22:46] <SpeedEvil> (who can shoot the above photographer in the head)
[22:49] <lz1dev> lmao
[22:49] <lz1dev> its galactus coming to eat the earth
[22:50] <SpacenearUS> New vehicle on the map: 03CALLSIGN123_chase - 12http://tracker.habhub.org/#!qm=All&q=CALLSIGN123_chase
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[22:59] <Laurenceb_> <zyp> I managed to saturate a 70g accelerometer once :)
[22:59] <Laurenceb_> thats easy if you whip your arm round really quickly
[22:59] <Laurenceb_> BeaverOne: looking interesting
[23:00] <Laurenceb_> I think you need to consider mechanical design
[23:00] <Laurenceb_> thats where I went wrong
[23:03] <Laurenceb_> well - I didnt give the ascent conditions as much thought as the flight conditions
[23:07] <Laurenceb_> but if you really want to do a parafoil imo thats going to be harder than a rogallo wing, in fact I'm not sure how doable it is
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[23:08] <Laurenceb_> well - at least as you scale down to small sizes, a large guided parafoil is obviously doable and has been done
[23:09] <Laurenceb_> https://www.youtube.com/watch?v=UV7zL07Tof8 possibly the most epic video on youtube
[23:11] <chris_99> how high did the rocket go i wonder
[23:12] <Laurenceb_> cant remember, iirc they got to about 90km
[23:12] <SpeedEvil> Laurenceb: shiny
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[00:00] --- Fri Oct 23 2015