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 & 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 <[email protected]> writes: >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 think this can be seen by the relatively constant >descent velocity, that only slows down just before reaching ground >level. > >Anyway, I'd love to have your experienced read on this! It was so cool >having the live GPS talking during the brief flight, had a bunch of >interested folk around us at NASA Ames/Moffet Field. > >Cheers, > Winton >_______________________________________________ >altusmetrum mailing list >[email protected] >http://lists.gag.com/mailman/listinfo/altusmetrum
2013-05-11-serial-968-flight-001.kml
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_______________________________________________ altusmetrum mailing list [email protected] http://lists.gag.com/mailman/listinfo/altusmetrum
