[Space] Why the payload was bouncing around some much.

Christie Dudley longobord at gmail.com
Mon Feb 8 13:37:22 PST 2010


What if we made the payload more bullet or torpedo shaped?  If it's being
bounced because of drag from the top, it makes sense to reduce that.  I was
wondering why they put pointy ends on the EOSS payloads they pictured.  That
would explain it.

Christie
_______
"The road of excess leads to the palace of wisdom." -- W. Blake.

The outer bounds is only the beginning.
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On Mon, Feb 8, 2010 at 1:25 PM, Jonathan Moore <moore at eds.org> wrote:

> Well we should use a much longer tether next time. That would help
> with the effects you describe but also with other effects too.
>
> Also did any one else notice how clearly we were in two different
> winds during the flight. If you look at the kml file you can see that
> at lower altitudes we went mostly south but at upper mostly west. For
> people wanting to steer the balloon it seems that changing altitude
> might be a easy way to do it.
>
> On Mon, Feb 8, 2010 at 1:20 PM, Michael O <m at dgmo.org> wrote:
> >
> > Some discussion at lunch reminded me to mention my pet theory for why the
> > payload was bouncing around to much.
> > I'd originally assume it was wind shear layers, but the video shows it
> was
> > moving around fairly violently for pretty much all the ascent.
> >
> > So my new theory is that having a 7ft+ balloon rising at a pretty decent
> > pace leaving a bunch of turbulent air beneath it which the payload is
> being
> > dragged through.
> >
> > This makes adding fins or suchlike to the payload a non-starter I think.
> > It'll just make it even more affected by the turbulence.
> > So now I'm back to having no idea how to usefully stablize the payload.
> >
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