[aprssig] Balloon lost near Shrewsbury, PA

Samúel Úlfr Þór Guðjónsson tf2sut at ulfr.net
Wed Apr 9 05:50:03 CDT 2014


Just stating the obvious here... I've found that bright orange color on
payload and parachute aids in locating it after a flight, especially when
they get lost due to tracker failure or similar problems.

Good luck on recovery!


73 de TF2SUT - Samúel


On 9 April 2014 04:56, Jim Alles <kb3tbx at gmail.com> wrote:

> Bob, I'll be driving through that area in the morning, and I would like to
> stop and look if I have the time (before a 1:30 appt @ Johns Hopkins).
>
> Wanted to coordinate efforts if anyone else was going to be traipsing
> through the neighborhood.
>
> Jim Alles, KB3TBX
> 814-280-0481
>
>
> On Mon, Apr 7, 2014 at 10:47 AM, Robert Bruninga <bruninga at usna.edu>wrote:
>
>> Short Story.  The balloon is lost near Shrewsbury, PA. But we are sure
>> (now after post processing) that we know where it is within about an acre.
>>
>> See: http://aprs.org/balloons.html
>>
>>
>>
>> Premature burst (or separation) caused the payload to descend at over
>> 5000 feet per minute slowing to 4000'/min (nearly 50 MPH straight down)at
>> last posit.  We did not know this at the time, and wasted our time
>> searching the track 1/2 mile beyond the last data point assuming the much
>> slower parachute design rate of 600'/min.
>>
>>
>>
>> When we got home, post processing revealed the high descent rate and the
>> more likely spot much closer to the last known position.  Also the high
>> impact is why it probably ceased transmitting.
>>
>>
>>
>> Also we were looking for a balloon and parachute in the trees, not (as it
>> turns out) for the football sized Styrofoam box (mostly covered in black
>> duct tape!) somewhere on the ground in the underburush.  We would not have
>> noticed that between other occasional trash in the area.
>>
>>
>>
>> Contact info is on the balloon.
>>
>>
>>
>> Bob, WB4APR
>>
>> 410-293-6417
>>
>>
>>
>>
>>
>>
>>
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>>
>>
>
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