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

Christopher Lincoln cclinco at gmail.com
Mon Feb 8 13:55:09 PST 2010


I started thinging about using a inprovised steady cam concept to help
dampen the vibrations, that with a styrophone sphere or rounded cylinder for
the housing.

I'll draw some concept sketches for Tuesday.

the dyi steadycam
http://cache.gawker.com/assets/images/lifehacker/2009/07/diy_steadicam.jpg


Christopher


On Mon, Feb 8, 2010 at 1:37 PM, Christie Dudley <longobord at gmail.com> wrote:

> 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.
> http://www.flickr.com/photos/genriel/sets/72157623376093724/
>
>
>
> 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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