highaltitude.log.20090917

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[01:12] <kleinjt> 78th
[01:12] <kleinjt> View All Ranked: Team Fortress 2 Servers
[01:12] <kleinjt> Game Server Rank: 658th (78th Percentile)
[01:12] <kleinjt> Highest (past month): 653rd Lowest (past month): 733rd
[01:12] <kleinjt> er...
[01:12] <kleinjt> sorry about that, I accidently dumped my clipboard
[01:13] <kleinjt> which happens to be right click, which happens to fill up every time I select something wihth my mouse
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[08:36] <rjharrison> Ping SpeedEvil
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[09:41] <SpeedEvil> .
[09:41] <SpeedEvil> oh
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[11:29] <Laurenceb> http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=367 interesting
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[11:58] <SpeedEvil> yeah
[12:43] <SpeedEvil> TODO: take more than 60 seconds to evaluate changes to flight control software.  When possible...
[12:43] <SpeedEvil> seems very relevant
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[12:56] <rjharrison_> Yo SpeedEvil
[12:57] <SpeedEvil> hiu
[12:58] <rjharrison_> SpeedEvil did you get my email
[12:59] <rjharrison_> From Paul Horowitz
[13:01] <SpeedEvil> yes
[13:02] <SpeedEvil> Personally, I'd get a - perhaps second hand - copy now - the basics will not change.
[13:02] <SpeedEvil> Yes there are parts that could do with a polish.
[13:02] <rjharrison_> Yep I mentioned that to him
[13:03] <rjharrison_> Asked for an update on the uC's
[13:18] <rjharrison_> Hey guys am i right in thinking that LED's don't have resistance
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[13:32] <rjharrison_> they dont:)
[13:34] <Matt_APEX> they do :\
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[13:56] <edmoore> rjharrison_: ping a ding
[14:20] <rjharrison_> Yo edmoore
[14:20] <rjharrison_> Sorry about the delay
[14:20] <rjharrison_> Just been plying with pyros
[14:20] <rjharrison_> http://www.robertharrison.org/images/cutdown/icarus-pyro.wmv
[14:20] <rjharrison_> 1200fps with led
[14:20] <rjharrison_> led affected firing :(
[14:21] <rjharrison_> So shone for about .5 second
[14:21] <edmoore> looks cool though
[14:22] <rjharrison_> oh your there ignore txt
[14:22] <rjharrison_> you're
[14:22] <rjharrison_> You called sir
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[14:58] <rjharrison_> PING all the UKHAS website seems down
[15:03] <SpeedEvil> Oh noes!
[15:03] <SpeedEvil> Call the ninjas!
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[16:43] <DanielRichman> Okey... So I has an atmega168; which claims to be DIL-28
[16:43] <DanielRichman> yet If I buy a dil socket 28 from maplin it's a double width socket
[16:46] <SpeedEvil> There are multiple width variations
[16:46] <SpeedEvil> however
[16:46] <SpeedEvil> wiresnips - cut off the bars between the sides
[16:46] <SpeedEvil> mount at the right spacing
[16:47] <DanielRichman> heh; good idea
[16:48] <DanielRichman> Hmm. What do you think the GCSE examiner will think of that tactic?
[16:48] <DanielRichman> :P
[16:53] <SpeedEvil> Personally - if I was examining it - it's neither positive or negative.
[16:54] <SpeedEvil> It shows you screwed up and ordered the wrong thing, however it also shows you are able to cope with real-life design issues.
[16:54] <DanielRichman> true
[16:54] <SpeedEvil> Especially if you write a bit about how you thought about alternatives to doing it, and any possible problems that might result
[16:59] <DanielRichman> gah. I should have ordered one less attiny and one more atmega last rapid order
[16:59] <DanielRichman> hindsight is a bitch
[17:00] <DanielRichman> It'd be good if Maplin sold AVRs... my brother seems to be visiting a Maplin so frequently to buy more switches and LEDs...
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[20:57] <Laurenceb> hi
[21:02] <SpeedEvil> h
[21:03] <Laurenceb> http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=367 <- v interesting
[21:03] <Laurenceb> their design actually sounds sensible
[21:03] <Laurenceb> they found some very nice CF tanks
[21:09] <SpeedEvil> yeah - saw that
[21:09] <SpeedEvil> looks like fun
[21:10] <Laurenceb> if they used some decent alu alloy lox tank and a CF fuel tank the fuel fraction would actually be decent
[21:10] <Laurenceb> I still dont get their obsession with radiatively/film cooled engines
[21:11] <Laurenceb> seems just plain crazy and the source of all their engine problems
[21:11] <Laurenceb> AIUI they have never tried a regen engine
[21:13] <SpeedEvil> they are in principle simpler
[21:13] <SpeedEvil> If you can get them to work
[21:13] <SpeedEvil> radiatively cooled engines are very simple.
[21:14] <SpeedEvil> If you can find a source of 12" Ir/Rh bar to turn them from :)
[21:14] <Laurenceb> they have been using stainless and alu alloy
[21:15] <SpeedEvil> yeah
[21:15] <Laurenceb> anyway... if you want to get to orbit cheaply, rockoon with off the shelf solid motors :P
[21:15] <SpeedEvil> which doesn't really do a whole lot of radiative cooling efore it melts
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[21:19] <Laurenceb> http://news.bbc.co.uk/1/hi/england/oxfordshire/8261287.stm <- why cant I get free fertiliser deliveries?
[21:20] <SpeedEvil> Clarkson isn't the problem.
[21:23] Action: Laurenceb is tempted to buy something from the diydrones store
[21:23] <Laurenceb> I wish they didnt have that stupid dspic on the IMU board
[21:23] <SpeedEvil> yeyah - lots of shit there
[21:25] <Laurenceb> guess I could get the academic version with a bit of bluffing
[21:25] <Laurenceb> but its still not the fully featured compiler
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[21:26] <Laurenceb> they are cheaper than sparkfun
[21:26] <SpeedEvil1> yeah. Lots of stuff there.
[21:27] <SpeedEvil1> I've been concentrating on boring stuff this year :/
[21:27] <SpeedEvil1> Getting to the stage where it's seeming to be all coming together though
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[21:28] Nick change: SpeedEvil1 -> SpeedEvil
[21:28] <Laurenceb> annoyingly some of the DIY drones board are on sparkfun, some on their site
[21:29] <Laurenceb> someone needs to make a VTOL UAV
[21:29] <SpeedEvil> I've got most of the bits - I just need some time - which is in short supply.
[21:30] <Laurenceb> heh yeah
[21:30] <Laurenceb> what sensors do you have?
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[21:31] <SpeedEvil> IIRC - accels, pressure sensors for the pitot and altimeter
[21:31] <SpeedEvil> And a couple of gyros that I sampled I think
[21:31] <SpeedEvil> I need magnetometers and stuff
[21:32] <Laurenceb> I'd seriously suggest writing a sim in octave and trying your control algorithms there first
[21:32] <SpeedEvil> yeah
[21:33] <Laurenceb> ukhas.org.uk is down :-/
[21:33] <SpeedEvil> I've been starting from the other end - get the hardware built - plenty of control authority - and the sensors - and then do 'wind tunnel' work and other tethered tests to extract some info.
[21:33] <Laurenceb> planning digital servos?
[21:34] <SpeedEvil> no.
[21:34] <Laurenceb> as in rs485
[21:34] <Laurenceb> ok
[21:34] <SpeedEvil> Unless I've screwed up - I don't think my control forces are that high
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[21:37] <Laurenceb> just helps to have torque, temperature, current draw ect from the servos
[21:37] <Laurenceb> and very EMI tolerant
[21:38] <SpeedEvil> yeaj
[21:38] <Laurenceb> you can get 21gram rs485 servos
[21:38] <SpeedEvil> Not I think needed for the initial tests
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[22:05] <Laurenceb> whats the target user?
[22:06] <Laurenceb> do you plan to sell it?
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[23:59] <Laurenceb> SpeedEvil: how about two of these http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5483&Product_Name=EDF_Fan_Unit_53mm_/_5300kv_/_680g_thrust_w/_Motor
[23:59] <Laurenceb> each with a servo for tilting
[23:59] <Laurenceb> then a camera slung off the bottom
[00:00] --- Fri Sep 18 2009