[aprssig] A strong argument for a cutdown device

Robert Bruninga bruninga at usna.edu
Sun Aug 11 00:06:12 CDT 2013

You lucky guy!!!  Your coming down within 25 miles of the nearest
anything, and luckily it is a home IGate!  At least you'll be able to
hear down to a thousand feet or so.  Its 1 Am and it will be on the
ground at this rate at 0119 EDT.  Good luck!


Its falling within direct range of an IGate!!!

On Sat, Aug 10, 2013 at 11:14 PM, John Gorkos <jgorkos at gmail.com> wrote:
> Our local club did a HAB launch today that went horribly wrong.  Check out
> the track of AB0OO-11 to see what I mean.  After 12 hours aloft, we are
> still getting good positional data from the balloon, but we have no control
> over it.
> We ran out of fill gas and only had about 3.5 pounds of lift on a 3 pound
> payload.  Instead of just aborting, we launched anyway.  The balloon
> averaged about 100 feet per minute of lift, and after 7 hours it had only
> made it to 60k feet.  For the last 4 hours, it's been gradually drifting in
> circles, getting lower and lower.  We're going to lose it somewhere over
> south western North Carolina, and we'll probably never see it again.
> This balloon was flying the new Byonics MT-400 tracker, which is still going
> strong with a Sparkfun >60k GPS (it's been flight tested by us to 93k) on 6
> Energizer Lithium Ultra batteries..  Unfortunately, I didn't include the
> additional battery pack, relay, and wiring needed for a nichrome cutdown, so
> instead of being able to abort the flight at the time of our choosing, it
> continues to drift aimlessly over the Carolina's, along with 2 HD video
> cameras.
> If anyone happens across what will probably be a still-inflated balloon, I'd
> really like the memory cards out of the cameras…
> John Gorkos
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