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

Greg Stramback grog at piratelabs.com
Mon Feb 8 14:18:28 PST 2010


On second thought, that'd probably just increase the risk of it blowing way
off course...

On Mon, Feb 8, 2010 at 2:17 PM, Greg Stramback <grog at piratelabs.com> wrote:

> how about a small drag-chute?  or will that be as ineffective as adding
> fins?
>
> -g-
>
>
> On Mon, Feb 8, 2010 at 2:09 PM, Michael O <m at dgmo.org> wrote:
>
>> I think it's less the drag on the payload, and more than the balloon is
>> dumping turbulent air onto it. So streamlining it won't stop it being bashed
>> around by frothing vorticies of air.
>>
>> The much longer tether is pretty much the only useful think I could think
>> of too.
>>
>> 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.
>>>> >
>>>> > _______________________________________________
>>>> > Space mailing list
>>>> > Space at lists.noisebridge.net
>>>> > https://www.noisebridge.net/mailman/listinfo/space
>>>> >
>>>> >
>>>> _______________________________________________
>>>> Space mailing list
>>>> Space at lists.noisebridge.net
>>>> https://www.noisebridge.net/mailman/listinfo/space
>>>>
>>>
>>>
>>
>> _______________________________________________
>> Space mailing list
>> Space at lists.noisebridge.net
>> https://www.noisebridge.net/mailman/listinfo/space
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.noisebridge.net/pipermail/space/attachments/20100208/38a734ac/attachment.htm 


More information about the Space mailing list