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[aprssig] [aprsisce] Transatlantic balloon attempt

Steve Daniels steve at daniels270.eclipse.co.uk
Sun Mar 25 00:09:58 UTC 2012


Agreed it's not a burst, worst case a slow leak, and as you say looks to be
just a cooling of the gas

 

Steve Daniels

G6UIM

Torbay Freecycle Moderator

  _____  

From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of R. Rochte
Sent: 24 March 2012 23:59
To: TAPR APRS Mailing List
Subject: Re: [aprssig] [aprsisce] Transatlantic balloon attempt

 

The descent rate right now is consistent with what I have seen from zero
pressure balloons (including solar Montgolfieres) after sun down.  Almost
certainly not a burst event or anything like that - just a simple cooling of
the gas.  It's still a long way down to the tropopause from there and it
will likely slow down as it approaches.  If it does, indeed, drop below the
tropopause before the sun comes up, then it will start to drop like a rock
(well, not quite, but a lot faster than we're seeing now).

 

The big question is, how is their ballast-release controlled?  There was a
tweet earlier that seemed to suggest it was timer-based and should have
already occurred by now.  If there is also an active ballast release system
on board (e.g., altitude dependent), then perhaps the flight is just getting
started.  

 

73,

Robert  KC8UCH

On Sat, Mar 24, 2012 at 7:52 PM, Greg D <ko6th.greg at gmail.com> wrote:

One more, 88,935 ft at 23:45z, but only 16mph.  I hope it isn't looking out
at the vast expanse of ocean ahead and chickening out.  Where is that jet
stream, anyway?

Greg  KO6TH




Lynn W. Deffenbaugh (Mr) wrote: 

Could be a pop and tumble, although I hope not.  At 89,662 feet, the copying
Digi/IGate pair are right at the edge of the coverage footprint.

  Note: 349 miles from balloon to digi and another 20 miles to the IGate.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 3/24/2012 7:15 PM, Greg D wrote: 

Not so fast...  aprs.fi just reported a ping at 23:11z.  Dropped a bit in
altitude and speed.  It may be a long night.

Greg  KO6TH


Steve Noskowicz wrote: 


 

Looks like we'll all be wondering until some time in the morning...  Good
luck Mr. Balloon.

 

-- 
73, Steve, K9DCI 






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