http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum hourly 1 1901-01-01T00:00+00:00 http://gmane.org/img/gmane-25t.png http://gmane.org http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/308 <pre>Awesome! I'll see you in Geneseo on the weekend. I'll be flying my Telemini for the first time. Elaine On May 20, 2013 10:58 AM, "Bdale Garbee" &lt;bdale-wvU4uTqWWAI&lt; at &gt;public.gmane.org&gt; wrote: </pre> Elaine Russell 2013-05-20T15:01:07 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/307 <pre>Enough of you knew my plans for yesterday and have emailed asking how things went that I thought I should just report here to let you all know that I flew a TeleMega (formerly MegaMetrum) v0.3 prototype for the first time yesterday at Tripoli Colorado's research launch at the buffalo ranch near Hartsel, CO. The board flew "solo" in my 98mm test-mule "Trick-o-Treat" on a CTI J600 red motor. It was a textbook-perfect dual deploy, and the data from the u-blox GPS looks great! We haven't studied all the sensor data yet, but so far I'm *very* happy with the performance of this board version. The wind came up making it unsafe to attempt a complex flight in the airframe I threw together to try some air-starts, but we'll be at the NAR National Sport Launch all of next weekend and hope to fly more tests there. http://altusmetrum.org/TeleMega I also wanted to note that using TeleBT on a 3-element Arrow yagi along with my Galaxy S2 phone running the latest released AltosDroid from the Google Play store was </pre> Bdale Garbee 2013-05-20T14:58:17 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/306 <pre>I'm actually thinking now Casey's point (from my FB page) might be relevant - I had the chutes tied about half way on the shock cord - so in theory they could have ejected halfway out and then had to wait for the wiggle to pull em out finally. The tubes I used were completely full - I was aware of that issue (the BP not being in close contact under all conditions). I think fundamentally if I'd been able to ground test I'd have known what the issue was for sure. W On Tue, May 14, 2013 at 9:31 PM, Bdale Garbee &lt;bdale-wvU4uTqWWAI&lt; at &gt;public.gmane.org&gt; wrote: </pre> Winton Davies 2013-05-15T04:52:56 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/305 <pre> I've never used those, but know people who have. Seems like a pretty good solution. The only suggestion I have is that if the vial wasn't *full* of BP, you should put a bit of wadding in before snapping the top closed, so the powder isn't moving around, as that can result in incomplete combustion. Bdale </pre> Bdale Garbee 2013-05-15T04:31:34 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/304 <pre>I used 0.5g centrifuge containers with the tip cut off, and a Q2G2 CA'd into the bottom, and then filled with 4F (without any tamping), and then closed the cap on the centrifuge. http://www.amazon.com/Bio-Plas-Siliconized-Polypropylene-Microcentrifuge/dp/B006MZ2ZCI Cheers, Winton </pre> Winton Davies 2013-05-14T02:58:24 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/303 <pre> My experience with BP charges suggests that anything smaller than about 0.7g is kind of "twitchy" unless you do a great job of containment so that it all burns cleanly. You didn't say anything about how you constructed the charges, though? Looks that way to me, too. This is not unusual. It depends on whether the e-match goes "open" when it fires or remains conductive. That depends on the design of the match, and I think also on how your build your charges and how much force is applied to the match head. See my recent blog post about batteries and pyro charges for more commentary on this. Sounds like you recovered the airframe ok, though? If I were making charges in surgi tubing I'd probably do 0.7g with the match head right in the middle of the BP if I could for the next try... Cool! Bdale </pre> Bdale Garbee 2013-05-14T00:41:42 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/302 <pre>I exported the data to a .kml file. The apogee of the flight does NOT look correct (unless your rocket took a quick left turn!). See attachment: Dennis Oubre Robotics &amp; Rocketry Instructor AJ Moore Academy at University High School Waco, Texas Light travels faster than sound, that's why some people appear bright until you hear them speak. - Anonymous Altus Metrum &lt;altusmetrum-OYIx8Vgitt76V6G2DxALlg&lt; at &gt;public.gmane.org&gt; writes: </pre> Dennis Oubre 2013-05-13T19:04:22 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/301 <pre>Hi All, So this was the maiden test flight - a modified Madcow Piranha (dual deploy with an extra 8" of length) on a G79W (which I thought should hit 800' according to Open Rocket but barely made 550 -- weirdly Madcow's simple little iphone app predicted this!). I had installed the motor ejection charge as a precaution as I had no way to ground test it. I believe the motor ejection charge fired first - just pre-apogee (the big blue acceleration spike). Looking at the 2 ejection centrifuge canisters (with 0.5g 4F) it looks like they both fired. But the voltage drops were different - the aft drogue appeared to have a tiny drop, but the main showed a huge drop. The main was set to fire at 400' (I thought it would have been about half way down from 800', but it was only down from 550). From ground observation it looked liked the 4F charge was too small to cleanly blow the chute packages (drogue was a reefed 30") out - and they seemed to wriggle out slowly and only fully inflate a 100' or so off the ground. I</pre> Winton Davies 2013-05-13T18:31:16 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/300 <pre>Rockets 2013 event in Fredericksburg, Texas streaming live right now…..liable to see some flights with your hardware aboard. [ http://www.ustream.tv/channel/rockets-2013 ]http://www.ustream.tv/channel/rockets-2013 University High School had 2 transonic attempts yesterday with the Telemetrum on board….unfortunately for all hardware…catastrophic failure.~ But the students had very astute observations and suggestions for the next build.~ Always learning…. Dennis Oubre Robotics &amp; Rocketry Instructor AJ Moore Academy at University High School Waco, Texas Light travels faster than sound, that's why some people appear bright until you hear them speak. - Anonymous </pre> Dennis Oubre 2013-05-05T20:44:06 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/299 <pre>Rockets 2013 event in Fredericksburg, Texas streaming live right now...liable to see some flights with your hardware aboard. http://www.ustream.tv/channel/rockets-2013 University High School had 2 transonic attempts yesterday with the Telemetrum on board..unfortunately for all hardware.catastrophic failure. But the students had very astute observations and suggestions for the next build. Always learning.. Dennis Oubre Rockets and Robots Instructor Waco, Texas </pre> Dennis Oubre 2013-05-05T20:39:55 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/298 <pre> Glad you got it working! -keith </pre> Keith Packard 2013-04-24T16:00:00 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/297 <pre>Hmm, odd. It maybe that they were too close or there was something about lying the altimeter directly on the table. After I wrote that it was working again, it stopped working, but then I picked up the altimeter and it worked (ie the monitor idle came on). I only had the 6" whip on the teledongle. Anyway, I put them on Facebook as proof - I'll see if I can link them into you. The 6v LEDs seemed to light up ok - the LiPO is a modified one. W On Tue, Apr 23, 2013 at 10:45 PM, Keith Packard &lt;keithp-aN4HjG94KOLQT0dZR+AlfA&lt; at &gt;public.gmane.org&gt; wrote: </pre> Winton Davies 2013-04-24T06:11:56 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/296 <pre> We'll only give you 4V from the lipo, and if you try a 12V lamp, you'll probably just end up causing the board to brown-out the CPU, especially if your lipo hasn't been 'repaired'. LEDs should work. If you can plug in the USB cable to the altimeter, you can use monitor idle over that instead of over the radio link through the TeleDongle. Once that works, check the radio frequency and callsign settings to make sure they match between AltosUI and the TeleMetrum. Finally, make sure you've got a bit of distance (3-4 feet or perhaps a bit more) between the TeleDongle antenna and the TeleMetrum antenna as you'll over drive the receivers if they're too close. Most of the troubles people have with TeleDongle to TeleMetrum connects are not having the callsigns match. -keith </pre> Keith Packard 2013-04-24T05:45:29 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/295 <pre>Nevermind. I think it was thinking :) It's now got 5 GPS satellite locks (inside my house, which is pretty darned cool, my Nike Sportswatch can't get that)! Yay! I see the igniter voltage is 3.7V's -- is this ok for Q2G2s? I guess I definitely need a lower LED voltage to test the firing. W On Tue, Apr 23, 2013 at 10:21 PM, Winton Davies &lt;wdavies-UfE5FQABeHN2Qaki92YDXw&lt; at &gt;public.gmane.org&gt; wrote: </pre> Winton Davies 2013-04-24T05:31:09 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/294 <pre>Hi, For a brief while I was able to talk to the telemetrum, and unsuccesfully tried to fire the charges (what voltage is supposed to come across those terminals - I tried a couple of small LED's in place, 12v ones, but they didn't light up - too high a voltage requirement?). Anyway, after that, I was trying to see if I could Monitor Idle Mode etc, and I started getting "Connecting... Call Sign etc", but it just hangs. I've rebooted everything but my computer to no avail! I get 3 beeps a delay then 2 beeps and 2 short beeps (I think - my ability to count short sounds is poor). The altimeter is lying down. Cheers, Winton </pre> Winton Davies 2013-04-24T05:21:46 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/293 <pre> Time to start a band, then? Wouldn't be a bad name for a metal band, methinks... ;-) Bdale </pre> Bdale Garbee 2013-04-23T00:11:22 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/292 <pre> For the ground station, I'd suggest trying out 1.2 .. it's getting close to release, and any remaining bugs are apt to be less annoying than the ones we know about in 1.1.1 that are already fixed. Bdale </pre> Bdale Garbee 2013-04-22T23:19:43 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/291 <pre>Great!  Now i'm going to look stupid trying to unload 500 pirated "MegaMetrum" t-shirts at NXRS!!!!!!! Brian &gt;</pre> Brian Vant Hul 2013-04-22T23:12:00 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/290 <pre>I should probably start with the 1.1.1 though right? That's been tested more? W On Mon, Apr 22, 2013 at 3:14 PM, Keith Packard &lt;keithp-aN4HjG94KOLQT0dZR+AlfA&lt; at &gt;public.gmane.org&gt; wrote: </pre> Winton Davies 2013-04-22T22:35:28 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/289 <pre> I've got a preliminary version of AltosUI version 1.2 available here: http://keithp.com/~keithp/altos We're finishing up this and would love to have feedback about anything, either positive or negative! -keith </pre> Keith Packard 2013-04-22T22:14:41 http://permalink.gmane.org/gmane.technology.rocketry.altusmetrum/288 <pre> We had it on v0.1, took it off on v0.2, and Ken and others convinced us to put it back on for v0.3. I think Keith plans 100hz, but I'll let him chime in if I'm wrong. Bdale </pre> Bdale Garbee 2013-04-22T21:03:59 Search the mailing list at Gmane query http://search.gmane.org/?group=$group=gmane.technology.rocketry.altusmetrum