highaltitude.log.20100813

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[00:25] <DanielRichman> Randomskk: it works
[00:28] <Randomskk> the one resistor thing?
[00:28] <Randomskk> DanielRichman: ^ ?
[00:29] <DanielRichman> yeah
[00:29] <DanielRichman> lemme get the pics onto the hdd
[00:29] <DanielRichman> aah cak I forgot to take a screenshot
[00:29] <Randomskk> epic
[00:29] <Randomskk> so essentially all this total crap everyone has been doing is redundant, you can just use a single 1.6mohm resistor?
[00:30] <Randomskk> and one digital output?
[00:30] <DanielRichman> Randomskk: ok basically I had to use 3M (3x1M rs in series) to get 425 shift, 1M was more like 1000 (didn't measure t he voltages so don't know if Rin was wrong or the presumed 0.3 = 425 shift)
[00:30] <Randomskk> yea
[00:30] <Randomskk> wait, 3M total?
[00:30] <DanielRichman> and yeah then all I did was Serial.begin(300); Serial.println("hi");
[00:30] <Randomskk> I was expecting 1.5M total to kinda worok?
[00:30] <Randomskk> but still
[00:30] <Randomskk> sick
[00:30] <DanielRichman> also you have to enable 2 stop bits if you want timing to work
[00:30] <Randomskk> how come?
[00:30] <DanielRichman> and arduino libs just fall over and die if you try to Serial.begin(50);
[00:30] <Randomskk> hah
[00:30] <Randomskk> perhaps software serial
[00:30] <Randomskk> would manage it
[00:31] <DanielRichman> Randomskk: I imagine it's the old timing-is-inaccurate fldigi won't resync unless there are 2 stop bits
[00:31] <DanielRichman> not 100% sure
[00:31] <DanielRichman> also the nim2 might behave differently, etc.
[00:31] <Randomskk> yea
[00:32] <Randomskk> maybe it has a slightly different Rin or such
[00:32] <Randomskk> but either way
[00:32] <Randomskk> one resistor
[00:32] <Randomskk> :D
[00:32] <DanielRichman> I'm not sure how clean the rtty was, maybe using the transmitter at the bottom end of the range is not great. but it defo worked
[00:32] <DanielRichman> it looked a bit ugly on the waterfall
[00:32] <Randomskk> would have to do Science, compare it properly
[00:32] <DanielRichman> indeed
[00:33] <DanielRichman> it is already tomorrow, science can wait
[00:33] <Randomskk> indeed
[00:33] <Randomskk> sigh, work
[00:33] <Randomskk> but, otoh
[00:33] <Randomskk> friday!
[00:33] <Randomskk> so, it is nearly the weekend
[00:33] <DanielRichman> true. Here comes a few poorly taken pictures
[00:34] <DanielRichman> Randomskk: you know what fldigi looks like when it's working so I don't have to show you that :P
[00:35] <Randomskk> indeed
[00:35] <Randomskk> tbh I also know what three resistors looks like
[00:35] <Randomskk> all you need to do is say "oh hey it works" really
[00:35] <DanielRichman> I was about to say, yeah there's not much to see
[00:35] <DanielRichman> so basically, great success.
[00:35] <Randomskk> :D
[00:36] <Randomskk> excellent
[00:36] <DanielRichman> if I remember I'll do some science tomorrow, otherwise when Upu comes back maybe he'll want to try it
[00:36] <Randomskk> cool
[00:36] <Randomskk> seeya later then
[00:36] <DanielRichman> bye
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[08:38] <m1x10> morning all
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[09:25] <fsphil> mooorning
[09:30] <earthshine> Morning
[09:30] <earthshine> Has anyone ever used a 4 pin analog pressure sensor before?
[09:31] <earthshine> I am confused how to wire it up - the datasheets are shit
[09:55] <m1x10> hi, earthshine
[09:55] <m1x10> Im sorry I cant help you, but can you show me a link of te sensor?
[10:11] <m1x10> DanielRichman, there is actually a note on my telescopic ant showing for each band the appropriate height.. For 144.8 shows 50cm. So I lowered the antenna now. Thx for spotting this issue yesterday.
[10:12] <m1x10> So its actually a l/4 now.
[10:16] <fsphil> can the antenna be fixed? I'd be worried about that moving during the flight
[10:17] <m1x10> how you mean to move?
[10:17] <m1x10> extend its size?
[10:17] <fsphil> yes
[10:17] <m1x10> no its to hard
[10:17] <m1x10> only if hits ground it may lower
[10:18] <m1x10> but im heading for water:)
[10:18] <fsphil> I was going to say, there isn't much you can do about the ground -- but you have :p
[10:19] <fsphil> how far from the coast do you think it might land?
[10:20] <m1x10> in the middle of nowhere..
[10:20] <m1x10> http://imagebin.org/109431, http://imagebin.org/109432
[10:22] <m1x10> fsphil, I can hear any comments
[10:22] <m1x10> :)
[10:23] <fsphil> I'm at work, can only take a brief peek :)
[10:25] <fsphil> looks great - how have you mounted the fsa03?
[10:28] <m1x10> yeah mounted on the plexiglass.
[10:29] <m1x10> dont make the usual comment for the blue rf wire. I already look for RG 174 :)
[10:31] <fsphil> aah yes, no shielding
[10:32] <m1x10> :P
[10:33] <fsphil> RG-174 should be ideal -- I had RG-58 on my last one, it was too stiff and on impact it broke
[10:34] <m1x10> yes, specs say its flexible.
[10:35] <fsphil> although your plexiglass frame should help keep things in place
[10:35] <m1x10> sure I mostly needed to mount the antenna connector
[10:36] <m1x10> then during development i drilled some more holes to make things better :)
[10:37] <m1x10> to be honest some relative of mine did the things. I was just commaning :)
[10:37] <fsphil> handy :)
[10:37] <m1x10> I dont have such toold
[10:37] <fsphil> are you putting insulation around it?
[10:38] <m1x10> I think of placing a thin cube shape styrofam and then the blanket
[10:38] <m1x10> battery is close to radio to keep it warm :)
[10:44] <m1x10> still with those batteries...its the 4th day and keep working.
[10:44] <fsphil> that's really good
[10:45] <fsphil> I hope you won't need 4 days to find it, but at least you know it can last that long if needed
[10:45] <m1x10> imagine when i put the lithium ultimates
[10:45] <m1x10> I believe it will work up to 1.5week
[10:45] <m1x10> for sure
[10:45] <m1x10> :)
[10:46] <m1x10> Im thinking of placing something to rotate the antenna at 180 when is goes less than 100m
[10:47] <m1x10> so before landing antenna will look up
[10:47] <m1x10> but i can think of a solution
[10:47] <m1x10> cant*
[10:50] <fsphil> it might be easier to have two antennas, and switch between them
[10:51] <fsphil> alternate between them both
[10:51] <russss> some kind of airbag maybe
[10:51] <m1x10> how to switch? sounds impossible to me.
[10:54] <fsphil> a second radio module perhaps, and use the enable pins to switch one off while the other is on
[10:55] <m1x10> ouuuh
[10:55] <m1x10> i cant afford more cost
[10:55] <fsphil> aah, an airbag on the antenna russss?
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[10:59] <fsphil> How does a buoy stay upright?
[11:00] <russss> they have a heavy bit at the bottom and an airspace at the top
[11:00] <russss> and it helps that they're anchored from the bottom
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[11:45] <g8khw-iPhone> Humm - someone seems to have dickered arround with the cusf predictor so it wont run under navigator on my iphone - clues as to who
[11:45] <g8khw-iPhone> ?
[11:51] <fsphil> I don't know -- but I'm amazed that it worked on the iphone. did it work well?
[11:52] <g8khw-iPhone> Yes - the basic predictor was fiine - i used it regularly in spare moments at wprk
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[11:54] <g8khw-iPhone> Loosing it is a pain
[11:55] <g8khw-iPhone> The hourly predictor part worked too except i coulnt select the points
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[11:56] <fsphil> best bet would be to talk to jonsowman
[11:56] <DanielRichman> I don't know if the old predictor is still available.
[11:59] <g8khw-iPhone> Major pain for me if it isnt
[12:09] <g8khw-iPhone> jonsowman jonsowman jonsowman - beetlejuce style
[12:10] <DanielRichman> he's detached from screen.
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[12:14] <g8khw-iPhone> Ho hum - lunchtime is over - back to work for me
[12:14] <DanielRichman> bye.
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[12:49] <m1x10> back with RG174 :)
[12:51] <fsphil> \o/
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[13:15] <Snomi> sup griffonbot
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[13:53] Action: griffonbot is GriffonBot [http://github.com/ssb/griffonbot]
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[13:57] <Laurenceb> hi
[14:00] <m1x10> hi
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[14:03] <SpeedEvil> hi
[14:03] <SpeedEvil> bye
[14:04] <m1x10> lol
[14:05] <juxta> evening all
[14:06] <m1x10> hi
[14:07] <juxta> hey m1x10
[14:07] <juxta> how are you doing?
[14:07] <m1x10> good and u?
[14:07] <m1x10> i took my coax rg174 cable
[14:07] <m1x10> and trying to figure out how to put it
[14:08] <juxta> not too bad
[14:08] <juxta> though looking forward to the return of warm weather :)
[14:09] <m1x10> heh
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[16:27] <DanielRichman> const unsigned char * or unsigned const char * ? I vote for the former
[16:28] <DanielRichman> it's just... the alliteration might be worth the fact that the second option is illogical
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[16:35] <ms7821> constchar is too hard to pronounce :/
[16:39] <m1x10> unsigned char can be replaced by byte
[16:39] <m1x10> both count 0-255
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[16:39] <m1x10> so const byte looks pretty :)
[16:41] <ms7821> byte isn't real
[16:41] <m1x10> what do u mean by that?
[16:42] <DanielRichman> there's no such type as a byte in C
[16:42] <m1x10> ah ok
[16:42] <ms7821> you can typedef unsigned char byte
[16:42] <DanielRichman> in C it's called a char.
[16:42] <DanielRichman> yeah but abuse of typedefs gets you hurt
[16:43] <ms7821> but then you could equally typedef unsigned char ipated and use that
[16:43] <m1x10> DanielRichman really didnt know that ! I never done C.
[16:43] <DanielRichman> C is good
[16:43] <DanielRichman> also m1x10 if you've programmed an arduino... that's C++
[16:43] <DanielRichman> well, it was before they mutilated it
[16:43] <m1x10> y i know
[16:43] <m1x10> I started from C++. Never did C
[16:44] <m1x10> c++ then java and now c#
[16:45] <DanielRichman> C# isn't too bad actually.
[16:45] <DanielRichman> shame about the company
[16:46] <DanielRichman> C# is like what java should have been
[16:48] <m1x10> C# isnt the best but neither the worst.
[16:49] <m1x10> java takes a lot to load and the swing is rather bad
[16:49] <m1x10> C# is loads very fast obviously cause its native to windows
[16:50] <m1x10> and the gui produced by WPF is fuc*** awesome
[16:50] <DanielRichman> yeah. Java is a nice language (apart from swing :D) but it's SO. SLOW.
[16:50] <DanielRichman> C# fixes java's crazy addition to setters & getters, and (it's not native) runs fast enough to be useful
[16:51] <m1x10> DanielRichman, check WPF gui: http://mixio.herobo.com/wiod/connection.png
[16:51] <m1x10> the gui lang is XML like
[16:51] <m1x10> and its too easy.. like doing hhtml
[16:51] <DanielRichman> ((C# is CLR - common language runtime or. smth. windowzy. The app is compiled - almost, and when run, the final step of the compilation is done by the JIT compiler (just in time) which produces the final native code)
[16:51] <DanielRichman> m1x10: shiiiny :D
[16:52] <DanielRichman> I think the CLR stuff means it can run easily on more than one arch. w/o recompilation
[16:52] <DanielRichman> by the time the program opens it's been nativly compiled
[16:52] <m1x10> look how text looks: http://mixio.herobo.com/wiod/debug1.png
[16:52] <DanielRichman> However this does make it almost as easy as java to decompile
[16:53] <m1x10> sure
[16:53] <DanielRichman> :)
[16:53] <m1x10> but the negative thing those langs have is that they get reversed in 10secs
[16:53] <DanielRichman> they require serious obfuscation
[16:54] <m1x10> yes
[16:54] <m1x10> but still a good cracker will do it
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[16:54] <m1x10> obf is to hide it up to medium level programmers
[16:54] <DanielRichman> hmm I don't know... if you obfuscate it well enough you can make up for most of the problem
[16:55] <m1x10> I have tried some tools and the turned my code into fuc** chinese stuff
[16:55] <DanielRichman> java by default has all of the local variables - with their original names - in the binary
[16:55] <DanielRichman> which is just like... write once, run (SLOW) everywhere, but d/w, everyone can read the source
[16:56] <m1x10> yeah too slow
[16:56] <m1x10> i strongly believe thats its good for educational purposes on OOP
[16:57] <m1x10> and for some serverside stuff
[16:57] <m1x10> like secure transcactions
[16:57] <m1x10> many banks Ive notice they use jsp
[16:58] <DanielRichman> java has quite good security features I think.
[16:58] <m1x10> yeah it does
[16:59] <m1x10> but for client side its sucks
[16:59] <DanielRichman> the concept of which code is executable, and the subsection that is trusted, is integrated with the JVM
[16:59] <DanielRichman> which is good for applet security
[16:59] <ms7821> CLR also allows you to pre-jit with ngen, which rocks
[16:59] <DanielRichman> yeah I heard about that, but never tried it
[16:59] <m1x10> is it true that oracle bought sun ?
[16:59] <DanielRichman> quite a while ago.
[17:00] <m1x10> and what is javas future?
[17:03] <russss> depends how badly oracle fuck it up
[17:04] <DanielRichman> well it's already been GPL'd, most of it
[17:04] <m1x10> I think development is somewhat stalled
[17:05] <russss> they're suing Google for patent violation though
[17:05] <russss> GPL2 doesn't cover patents
[17:05] <russss> also development isn't stalled, Java 7 will be out soon http://en.wikipedia.org/wiki/Java_version_history#Java_SE_7.0
[17:06] <m1x10> oh
[17:06] <russss> including closures
[17:06] <m1x10> yeah
[17:07] <m1x10> wow it will support multicore system at last !
[17:07] <m1x10> like .net4
[17:08] <russss> it's supported threading for ever
[17:08] <russss> it just has some better concurrency features
[17:08] <m1x10> i think what u say its different
[17:09] <m1x10> threading is the usual thing we all know
[17:09] <m1x10> the multicore support means you will be able to choose what functions in your code will run on each core
[17:10] <m1x10> mean that 2 functions will run in paraller
[17:10] <m1x10> not one by one like in threading
[17:12] <DanielRichman> closures? interesting
[17:12] <DanielRichman> it's almost supported that for a while
[17:12] <DanielRichman> I think you can sort-of do it. I can't remember how though
[17:29] <ms7821> m1x10: so lite threading?
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[17:56] <m1x10> ms7821, what?
[17:56] <ms7821> well it's presumably just threading with a decorator
[17:56] <m1x10> the multicore thing?
[17:57] <ms7821> yeah
[17:57] <m1x10> I really dont know.
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[18:32] <simhed> what can be the possible reason i'm getting fart-like sounds from ntx2 instead of nice, clean bip-bip like i heard on some videos..?
[18:45] <fsphil> too high a shift? or a problem with the rtty bits
[18:48] <fsphil> if the tuning on the radio is off, it can sound pretty bad too
[18:48] <simhed> hm.. i'll recheck everything then..
[18:53] <DanielRichman> fart like sounds? can you upload a mp3/wav/ogg?
[18:53] <DanielRichman> you could be tuned to the ajacent band
[18:53] <DanielRichman> actually, are you in FM mode rather than U/LSB?
[18:54] <DanielRichman> and does it decode?
[18:54] <DanielRichman> <-- has to go, bbl
[18:54] <fsphil> aah, didn't think about the mode
[18:56] <simhed> let me capture it
[19:10] <simhed> http://www.mediafire.com/?k73q729tfw3qlar
[19:11] <simhed> i'm not sure what mode i'm in to be honest
[19:11] <simhed> using yaesu ft7900, default settings
[19:11] <simhed> let me check the manual..
[19:13] <fsphil> I believe that radio can only receive FM
[19:15] <simhed> uhh
[19:15] <simhed> :/
[19:15] <fsphil> yep
[19:16] <simhed> so it's no use..? should i get a radio that can receive in LSB/USB?
[19:16] <simhed> or is there any workaround for that?
[19:16] <fsphil> ideally yes
[19:16] <SpeedEvil> You can in principle decode rtty in FM mode.
[19:17] <SpeedEvil> However, the performance will be somewhat poorer.
[19:17] <fsphil> decode from the level itself
[19:17] <SpeedEvil> yes
[19:17] <simhed> i see
[19:17] <SpeedEvil> The performance is poorer.
[19:17] <simhed> performance in terms of distance for example?
[19:17] <SpeedEvil> In that it will lock to any stronger signal in the 10/50KHz or whatever FM band.
[19:17] <SpeedEvil> So co-channel interference screws you.
[19:17] <simhed> ic
[19:18] <SpeedEvil> And it also means that when you approach the noise floor, instead of only being able to consider noise in two ~100Hz wide channels, you get noise from the whole 10KHz
[19:18] <SpeedEvil> I would - guesstimate - that it'd be perhaps 6-8dB less sensitive.
[19:18] <simhed> uhm
[19:19] <SpeedEvil> So maybe half to a third of the range.
[19:19] <SpeedEvil> That's assuming you've got something to do the decoding - stock fldigi won't do it
[19:19] <simhed> i downloaded dl-fldigi 'hab mode'
[19:20] <simhed> that's what i'm using now
[19:20] <SpeedEvil> yeah - that's designed for rtty recieved in SSB mode
[19:20] <DanielRichman> SpeedEvil: what about generating rtty in FM mode?
[19:20] <Randomskk> we already do
[19:20] <SpeedEvil> We already do that.
[19:20] <DanielRichman> well I mean, fmfm then
[19:20] <SpeedEvil> It's just that the reciever is SSB, as that is far better noise performance
[19:21] <DanielRichman> I know that we have a FM transmitter. What if we fed sinewaves of different frequencies into it. I know it's not at all ideal, but it might help out those w/o a ssb receiver
[19:21] <SpeedEvil> If you recieve in FM mode, you instead of the 'normal' RTTY signal on the audio out hear a buzzing of the audio direct.
[19:21] <SpeedEvil> This is quite possible to decode.
[19:21] <SpeedEvil> It's just needing a different soft-modem
[19:22] <SpeedEvil> as it's basically just the highpassed serial signal
[19:22] <simhed> hm hm..
[19:22] <DanielRichman> indeed.
[19:22] <simhed> what can i use instead od fldigi then?
[19:22] <SpeedEvil> I don't know there is a reciever.
[19:23] <SpeedEvil> In principle, it would be moderately simple. Differentiator, threshold detector, flip-flop
[19:23] <SpeedEvil> ->software UART
[19:23] <Randomskk> it might work in the lab
[19:23] <Randomskk> not convinced I'd want to rely on it for a flight
[19:23] <Randomskk> better to beg/borrow/ste--buy a real radio
[19:24] <simhed> i think i will have to
[19:24] <simhed> i'm launching on sunday
[19:24] <SpeedEvil> Randomskk: indeed.
[19:24] <simhed> or will just go with GSM tracking
[19:24] <Randomskk> that's like, a whole day to beg/borrow/steal
[19:24] <simhed> but that's kinda risky
[19:24] <SpeedEvil> Randomskk: we 'see' with SSB 10KHz slice of the spectrom
[19:24] <Randomskk> just use your existing radio to get in touch with other hams and beg them
[19:24] <SpeedEvil> From vague recollections, perhaps 1/4 flights get co-channel?
[19:24] <simhed> i'll do that, thanks..
[19:25] <SpeedEvil> But that doesn't interfere due to SSB
[19:25] <Randomskk> more than that if you've got a 10khz slice
[19:25] <DanielRichman> ssb receivers are a 3/2.7KHz slice?
[19:25] <SpeedEvil> hmm - true
[19:25] <SpeedEvil> well - if FM is 4* wider - you might get interference most times.
[19:25] <SpeedEvil> And you can't reject that interference.
[19:25] <SpeedEvil> As the FM reciever locks to it.
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[20:12] <griffonbot> @dbsnyder: SurfsUp6 flight Saturday 10:15AM from Wyandot Co Airport, OH http://www.arhab.org/flights/page22/page22.html #ARHAB [http://twitter.com/dbsnyder/status/21088614220]
[20:12] <simhed> i guess i will stick to GSM tracking
[20:13] <simhed> and maybe using ntx2 emitting some static signal every 10 secs, and then trying to catch this signal with my directional antenna
[20:14] <simhed> i doubt i'll manage to find SSB transceiver
[20:14] <SpeedEvil> Or if you have FM - you can just instead of emitting levels, emit tones.
[20:14] <simhed> hmm
[20:14] <SpeedEvil> setup the pwm unit to emit 400hz/520Hz or so
[20:14] <DanielRichman> or do CW with the sqelch
[20:15] <SpeedEvil> Filter it a bit, and connect directly to the modulate input
[20:15] <SpeedEvil> then it 'just works' with fldigi.
[20:15] <SpeedEvil> Though at shorter range.
[20:15] <simhed> i don't think my knowledge is sufficient to do that
[20:15] <simhed> in this time period
[20:15] <SpeedEvil> In principle that way, everyone could just use their existing tracker setup, so you get distributed listening too.
[20:16] <SpeedEvil> simhed: are you in ght eUK?
[20:16] <simhed> not at the moment
[20:16] <simhed> i'm abroad
[20:16] <SpeedEvil> ah.
[20:16] <SpeedEvil> So probably not in range then.
[20:16] <simhed> not really - i thought of using other ppls help too
[20:17] <simhed> but here where i am, i am on my own
[20:17] <simhed> well, i'm going out for a beer and think about some other possible solutions
[20:17] <simhed> see you later and thanks for all suggestions
[20:17] Action: simhed is away
[20:17] <SpeedEvil> Good luck.
[20:17] <simhed> cheers
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[20:38] <DanielRichman> Randomskk: If you have (quite) a few git commits, and you rebase-squash them into one commit before publishing/pushing since that seems more appropriate, then you can still git reset --hard (old, pre-rebase id) to recover the old history and all the garbagey commits; presumably their data is still in .git somewhere. Is there any way to garbage-collect up unreferenced commits, if all the branches & refs have the rebas
[20:41] <DanielRichman> oh safe, git reflog. I'll try that
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[20:57] <DanielRichman> reflog --expire=1.second && fsck && prune && gc
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[21:29] <Laurenceb> hi all
[21:31] <Laurenceb> http://highpowerrocketry.blogspot.com/2010/05/n-prize-team-profiles.html
[21:31] <SpeedEvil> Interesting. Not read any yet.
[21:31] <SpeedEvil> SpaceX just continues to get more awesome.
[21:33] <SpeedEvil> Ok - cestus 1 is nonsense - they can't be counting drag.
[21:33] <Laurenceb> heh my thoughts
[21:35] <SpeedEvil> I wish I could get the funding and trime to play with my concept.
[21:36] <SpeedEvil> Basically each stage has 1 part payload, 4 parts fuel and structure. The payload can either be a payload capsule, a recovery chute, or another stage.
[21:36] <SpeedEvil> And each one is designed so it canbe tested multiple timers before stacking.
[21:38] <Laurenceb> pressure fed?
[21:39] <SpeedEvil> yes.
[21:39] <SpeedEvil> Basically really, really dumb.
[21:39] <SpeedEvil> For example - there is one position actuator.
[21:39] <SpeedEvil> Which is a vane dipped in the exhaust that makes the thrust assymetric
[21:42] <Laurenceb> oh not that
[21:42] <Laurenceb> its nuts :P
[21:42] <SpeedEvil> I'm unsure.
[21:43] <SpeedEvil> Actually - it was a relarted concept that I don't see why itr won't work
[21:43] Action: SpeedEvil sighs at keyboard. My r key is oversensitive.
[21:43] <SpeedEvil> Basic idea is a nozzle extension.
[21:43] <SpeedEvil> This however is assymetric.
[21:44] <SpeedEvil> I don't see why this would obviously have any massive heating issues.
[21:44] <Randomskk> DanielRichman: I think you can just gc to collect old unreferenced commits
[21:44] <Randomskk> but gc only collects things that are like, two weeks? or something by default
[21:45] <DanielRichman> reflog still held a reference to all the garbage
[21:45] <Randomskk> git uses so little space on the filesystem it's really not worth worrying about a few junky commits
[21:45] <DanielRichman> yeah true
[21:45] <Randomskk> on the off chance you need them after all
[21:45] <DanielRichman> don't worry, I did a backup
[21:47] <Randomskk> fair enough
[21:47] <Randomskk> man, I'd forgotton just how good jquery was
[21:50] <SpeedEvil> Laurenceb: Have I gone on about my weight-shift flapper to you before?
[21:50] <Laurenceb> nope
[21:51] <SpeedEvil> Ok - take a nice long glider wing, very rigid.
[21:51] <SpeedEvil> In the middle of this place a circular disk, with the axis along the wing.
[21:52] <SpeedEvil> Inside this disk is a weight. It rotates, and moves the centre of gravity up and down to almost the diameter of the disk
[21:52] <SpeedEvil> which makes the wing flap up and down.
[21:52] <SpeedEvil> You also twist the wing with respect to the weight - slowing it up or down - to give you the right angle of attack.
[21:52] <Randomskk> http://arabnews.com/saudiarabia/article99369.ece
[21:52] <Randomskk> JEDDAH: The giant clock of Makkah is all set to tick home a new time standard, as some scholars believe that it will be an ideal alternative to the Greenwich Mean Time (GMT).
[21:52] <Randomskk> Many scholars are of the opinion that Makkah Time can provide the world an alternative to the GMT. These people have scientific arguments to back their contention, as Makkah is situated in the center of the world.
[21:53] <Randomskk> sorry, what
[21:53] <SpeedEvil> ...
[21:54] <SpeedEvil> In principle, the above would seem to be quite an efficient propulsion method.
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[22:16] <Laurenceb> interesting
[22:17] Action: Laurenceb just finished swapping the pins round
[22:17] <Laurenceb> passes DRC ok - just need to fix the silkscreen
[22:17] <Randomskk> nice
[22:18] <Laurenceb> also I'll increase the size of the smps caps up to 0805
[22:18] <Randomskk> out of interest, why?
[22:18] <Laurenceb> spice seems to think it will work more stably at higher currrents
[22:18] <Randomskk> spice does package sizes?
[22:18] <Laurenceb> its the choice of voltage/capacitance/ESR
[22:19] <Laurenceb> avaliable at each size point
[22:19] <Laurenceb> http://en.wikipedia.org/wiki/Single-ended_primary-inductor_converter
[22:19] <Randomskk> ah, right
[22:19] <Laurenceb> size of C1 has a big effect on performance drop off at higher currents in my sim
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[22:20] <Laurenceb> bbl
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[00:00] --- Sat Aug 14 2010