There is an article in the May/June 2007 issue of Sport Rocketry (the
NAR rag), on Casimiro, a rocket built by an Italian. He has a web site
at www.criscaso.com, all in Italian. Finless, active guidance for
stability, E9 for first launch, F12 for second...
The videos show a short finless flight;
On Tue, 2007-06-05 at 14:33 -0700, Andrew Greenberg wrote:
> However, we had one of those "aha" moments several months ago where we
> realized that our avionics system is a pretty darn good satellite by
> itself
We're not currently selecting space-rated parts, and experiences with
other satellite
On Fri, 2007-06-08 at 11:43 -0700, Andrew Greenberg wrote:
> Space rated parts are necessary for standard duration space missions.
Not really; amsat often uses COTS chips that aren't stable under
radiation, but which exhibit known (and reversable) failure modes.
SA1100 chips with cache disabled an
On Tue, 2008-12-23 at 07:34 -0800, Glenn LeBrasseur wrote:
> Hey Keith and Bdale,
>
> The design looks pretty decent, no glaring flaws I can see. Good thing
> since you probably sent the design out yesterday! :)
We were hoping to, but various things conspired to keep us busy revising
them. Thank
On Tue, 2008-12-23 at 17:28 -0800, Andrew Greenberg wrote:
> OK, so, I see a couple things that don't look right but that's probably
> because I don't know which parts you're actually using. Do you have a
> bill of materials with actual part numbers. Not just "miniUSB", but
> actual mfg (or even b
On Wed, 2008-12-24 at 10:48 -0800, Erik Walthinsen wrote:
> I took a quick look at the postscript dump of the boards, and I'm seeing
> a lot of things that make really nervous about the layout, specifically
> regarding design rules. There are a lot of things jammed right up
> against the edge of
Bdale pushed out the board order this evening, we're getting 50 made of
this version. Thanks very much to all of your review; we're a lot more
confident that the board will come back and be useful now. With luck, it
will actually even work as a flight computer.
--
keith.pack...@intel.com
signat
Any suggestion on whether to get a stencil (with the sides turned up) or
a foil (completely flat) to print the solder paste through?
--
keith.pack...@intel.com
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On Fri, 2008-12-26 at 02:25 -0800, Andrew Greenberg wrote:
> Completely flat! The sides turned up don't really help, they just get in
> the way.
Any idea why stencils come like this then? It seems crazy.
--
keith.pack...@intel.com
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On Wed, 2008-12-24 at 10:51 -0800, rq1...@q7.com wrote:
Thanks so much for your review; glad to hear there aren't any
show-stoppers as we've just sent the boards in to be fabbed yesterday.
> I don't like mechanical power switches for high reliability devices, nor
> for rechargeable batteries.
We
On Thu, 2009-02-19 at 02:53 -0800, Andrew Greenberg wrote:
]
> Any word on getting some of Keithp and Bdale's sensor?
I just ordered 3 from digikey last night; should be here early next week
(2 day shipping)
--
keith.pack...@intel.com
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Bdale got busy with the skillet and loaded two TeleMetrum boards.
They're looking great, although we don't have them running yet.
http://www.altusmetrum.org/TeleMetrum/
From the top, clockwise, there's the pressure sensor (with the hole in
the top), the beeper, the serial connector, the 48MHz xta
On Wed, 2009-03-25 at 13:01 -0700, Andrew Greenberg wrote:
> - High dynamics mode (made for crop dusting airplanes!)
Maximum Speed: 1607 kph (999 mph)
Not exactly speedy; I wonder how this limit is expressed in the output
data.
--
keith.pack...@intel.com
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On Thu, 2009-04-23 at 12:50 -0700, rq1...@q7.com wrote:
> I didn't go back and look, but iirc, psas flight data has the same
> pressure glitch at motor burn-out. Previously we have attributed the
> glitch to changes in the pressure field over the vehicle surface due to
> the presence or absence of
On Mon, 2009-06-01 at 17:06 -0700, Andrew Greenberg wrote:
> That was the motor chuffing, we think. Keith, can you give us the column
> names and units for your gnumeric file? I'd like to post it as cvs.
he colums in the spreadsheet are:
A: time (seconds)
B: height above ground (m from baro sens
On Tue, 2009-06-02 at 18:52 -0700, Josh Triplett wrote:
> Honestly, at this point, having seen Keith's nice communication modules
> in action, I think we should just use those. They connect to USB, and
> work like a USB serial device.
Actually, they just have a USB client endpoint; you can make
On Wed, 2009-07-01 at 13:24 -0700, Andrew Greenberg wrote:
> - Choose a channel.
> - Design a new series of CPAs.
> - Make them.
> - Test them in the lab.
> - Make new ground antennas.
> - Take them out to the gorge and test the whole lot.
Some day, I'd love to rip out the analog ATV and replace
On Sat, 2009-07-11 at 10:16 -0500, Bdale Garbee wrote:
> So looking at cameras and/or the raw sensor
> assemblies used for digital cameras and camcorders might be the best
> path.
Using the 802.11a link seems trivial once we've got USB bandwidth in the
rocket to get data from a camera into the
On Sun, 06 Dec 2009 20:55:15 -0800, Andrew Greenberg
wrote:
> I've got a couple of questions already on this, and reviews are best
> done in a group setting; if you can make it Tuesday, let's devote a some
> time to carefully reviewing the board.
I'm getting dragged to a three day meeting, cros
On Wed, 14 Apr 2010 08:10:10 -0700, Andrew Greenberg
wrote:
> Hi Doug,
>
> No, I don't think the 60,000ft limit will be a problem for us this year.
> That said, the 8 g acceleration limit and the 1,000 knot speed limit
> may be.
The 8g acceleration limit may also affect the loop pass filter
ba
On Tue, 13 Apr 2010 22:45:45 -0700, Jeremy Booth wrote:
> I'll bring the other one of these in for I2C testing. Anyone have any other
> silly other I2C devices we might be able to use for I2C, SPI, etc
> bus/protocol testing?
I've got a couple of i2c and spi eeproms if you want to play with
the
On Thu, 7 Oct 2010 14:10:21 -0700, Jeremy Booth wrote:
> Honestly, smoke balls in an apparatus for precise ignition might work
> rather well...
Anything which generates heat/flame that might be burning on the ground
is heavily frowned upon.
--
keith.pack...@intel.com
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On Thu, 7 Oct 2010 16:53:51 -0700, Dave Camarillo
wrote:
> That's a great point! I would love the smoky-flag indicating where the thing
> landed on the ground... I would also mention, if there is a risk in the area
> that we launch, the flight computer can cut off power to the smoke
> generator.
On Thu, 7 Oct 2010 15:38:16 -0700, Dave Camarillo
wrote:
> It seems like it should be OK to light stuff on fire and/or make smoke
> electrically anytime after the motor has started up... I hope that wouldn't
> be frowned upon?
It has been; the concern is in having something burning after the ro
On Mon, 5 Sep 2011 09:53:45 -0700, Dave Camarillo
wrote:
> After bouncing back and forth with the advantech sales rep, it turns
> out that the extended temp range flight computer board is not cleared
> for the US yet. On top of that, it has a 12 week lead time even if it
> were cleared. The notes
K Wilson writes:
> Hi all,
>
> I've added instructions for installing the
> cross compiler we will be using for ARM firmware
> development to this page:
I've got an arm cross compiler packaged (both binutils and gcc) for
Debian and uploaded to the new queue. The GCC package is based on the
Debia
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