highaltitude.log.20070405

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[21:53] <jcoxon> evening all
[21:54] <rocketboy> hiya jc - I hear they got N5 back and have the video
[21:54] <jcoxon> yeah
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[21:54] <jcoxon> they are going to upload it to my webspace
[21:54] <jcoxon> i'll see if they've done it
[21:54] <rocketboy> spiffing
[21:54] <jcoxon> started my ground control software :-D
[21:55] <rocketboy> good ?
[21:55] <jcoxon> well its a start
[21:55] <jcoxon> reads a gps off a serial port and displays the data nicely
[21:55] <jcoxon> nice gui
[21:57] <jcoxon> nope no video yet
[21:58] <rocketboy> OK - just working on a RC sevo PWM controller - thought I'd make it a seperate board - with its own PIC - send it commands over a TTL serial link
[21:58] <rocketboy> that way off-load the timing issues from the main CPU
[21:59] <jcoxon> sounds like a plan
[21:59] <jcoxon> also nice and modular
[22:00] <jcoxon> i'm constructing peg V as well
[22:00] <jcoxon> trying to decide the best case layout
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[22:08] <Laurenceb> Hi all
[22:09] <rocketboy> hiya
[22:10] <Laurenceb> Havent sent the parcel off to the guy in st neots yet
[22:10] <Laurenceb> will do it tomorrow
[22:11] <rocketboy> I sent mine off today
[22:11] <Laurenceb> I'll post the radio to you as soon as it arrives back
[22:11] <rocketboy> no rush
[22:11] <Laurenceb> what did you send off?
[22:12] <rocketboy> a jiffy bag to get my payload and chute back
[22:12] <Laurenceb> oh where was it found?
[22:13] <rocketboy> they came down in banbury
[22:13] <Laurenceb> wow thats miles!
[22:14] <rocketboy> yeah - i guess it drifted some
[22:15] <Laurenceb> hmm looking at the landing site for the glider and the loss of radio contact i'm pretty sure it went into a spiral dive
[22:15] <Laurenceb> I think we lost radio contact due to it getting too low
[22:15] <rocketboy> it came down about here http://www.streetmap.co.uk/newmap.srf?x=443070&y=242140&z=5&sv=443070,242140&st=4&ar=Y&mapp=newmap.srf&searchp=newsearch.srf&ax=443070&ay=242140
[22:16] <Laurenceb> I see
[22:16] <rocketboy> about 100km
[22:17] <Laurenceb> pity it didnt have a camera on
[22:17] <rocketboy> which I guess is consistant with 40kph winds
[22:17] <rocketboy> yeah
[22:17] <Laurenceb> maybe we dont need tracking at all :)
[22:17] <rocketboy> yeah
[22:17] <rocketboy> Nova 5 has been found too (in case you didn't know)
[22:18] <Laurenceb> oh wow, was the rocket onboard?
[22:19] <rocketboy> I think so - it didn't fire
[22:19] <Laurenceb> has anyone worked out what happened?
[22:19] <rocketboy> I think they are working on it
[22:20] <rocketboy> seems likly that they get found - if they don't go out to sea
[22:20] <jcoxon> indeed it does
[22:20] <Laurenceb> glider wise, I think thermopiles are needed on rigid gliders
[22:21] <jcoxon> this might be out of order but i worry about the increasing failure rate
[22:21] <jcoxon> and the fact that we are beginning to rely on them being found
[22:21] <Laurenceb> but on rogallos or parawings my existing code might work
[22:21] <Laurenceb> well my latest mission was very ambitious
[22:22] <rocketboy> so how many missions have we had?
[22:22] <rocketboy> P1, P2 P3, M1, N1
[22:23] <Laurenceb> A lot, the ukhas main page needs updating :)
[22:23] <rocketboy> M2, N2
[22:23] <Laurenceb> M2 sucess
[22:23] <jcoxon> P1-3 N1, N2, N4, N5
[22:23] <jcoxon> m1,m2,m3
[22:23] <jcoxon> x1
[22:23] <Laurenceb> m3 relied on other payloads for tracking, wont try that again :)
[22:23] <jcoxon> mc1
[22:24] <rocketboy> yep
[22:24] <jcoxon> 12?
[22:24] <Laurenceb> ultrahab wise, I've modified the hook design, the design on the wiki wont always work
[22:24] <rocketboy> think so - does that include the one that got washed up
[22:24] <Laurenceb> it needs to be shaped more like a 1
[22:24] <jcoxon> that was N3
[22:24] <rocketboy> ok
[22:25] <jcoxon> guess we should count that
[22:25] <rocketboy> humm - I think we should
[22:25] <jcoxon> 13
[22:25] <jcoxon> mia - p2 n2
[22:26] <rocketboy> wow - just trying to work out how many I have been at the launch
[22:26] <rocketboy> not P1 or P2
[22:26] <jcoxon> p1 worked
[22:26] <Laurenceb> didnt realise how many we had launched!
[22:26] <jcoxon> oh right
[22:27] <Laurenceb> rocketboy, do you use c for your code?
[22:27] <jcoxon> n4 as well rocketboy
[22:27] <rocketboy> and 2 of the novas (but I was in on the recovery of one)
[22:27] <jcoxon> oh actually you went to the recovery
[22:27] <rocketboy> so 9 launches
[22:28] <jcoxon> not bad at all
[22:28] <rocketboy> Lb - I use the microchip C compiler
[22:28] <Laurenceb> I'm thinking of getting a c compiler for avrs
[22:28] <Laurenceb> just wondering how to process strings
[22:29] <jcoxon> it can be done in C
[22:29] <jcoxon> its just a bit of a hassle
[22:29] <Laurenceb> guess there is strings.h
[22:29] <jcoxon> C isn't very string friendly
[22:29] <Laurenceb> can you use scanf to get strings over serial?
[22:30] <jcoxon> depends on what system you are using
[22:30] <Laurenceb> hmm, dont know that yet :P
[22:30] <jcoxon> as in what libraries etc
[22:30] <jcoxon> e.g. today i wrote a gps parser in ruby
[22:30] <jcoxon> in total its about 6 lines
[22:31] <jcoxon> + the serial library
[22:31] <Laurenceb> IAR c compiler for avrs is avaliable as a 30 day trial
[22:31] <Laurenceb> might try that out
[22:33] <rocketboy> humm - was N5 found near bedford?
[22:34] <Laurenceb> anyone know a low noise instrumentation amp with high gain and high input impedance?
[22:34] <jcoxon> rocketboy, not sure
[22:34] <Laurenceb> I'm thinking of the vlf reciever
[22:35] <rocketboy> ah - OK I thought someone said bedford
[22:35] <rocketboy> lb - don't think it will work
[22:35] <Laurenceb> why not?
[22:35] <rocketboy> just a gut feel
[22:35] <Laurenceb> not for attitude, just interest
[22:36] <Laurenceb> thought it would be interesting to record vlf at altitude
[22:36] <rocketboy> ah - ok
[22:36] <Laurenceb> a field mill would be good though
[22:36] <rocketboy> you would need a long wire - or are you going for a loop
[22:36] <Laurenceb> long dipoles above and below
[22:37] <rocketboy> but dangerious on landing
[22:37] <Laurenceb> and payload hanging below main payload
[22:37] <rocketboy> power lines and all that
[22:37] <jcoxon> hmmm tis a good point about landing
[22:38] <Laurenceb> pc cooling fans would be good for making a field mill
[22:38] <Laurenceb> you have a pulse output to regulate the speed
[22:38] <Laurenceb> then use filters to filter the signal to remove noise
[22:39] <Laurenceb> its possible to make a 2 axis field mill with one rotor for pitch and roll
[22:40] <Laurenceb> you'd probably need a dedicated micro to take care of it
[22:41] <Laurenceb> bbl
[22:44] <jcoxon> right i'm off to bed
[22:44] <jcoxon> night all
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[22:46] <Laurenceb> hi again
[22:46] <Laurenceb> oh everyones left :(
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[00:00] --- Fri Apr 6 2007