[Space] Tether string issue

Christie Dudley longobord at gmail.com
Tue Apr 6 11:50:55 PDT 2010


I don't think super-thin is important.  In fact, I personally think it's a
detriment and it's a potential trip hazard problem that we'll have to solve,
although I think we should do that regardless of the string we get.

The primary problem is we know the string's strength.  NASA likes these
numbers.  We've already given them the ones from the kite string Meredith
found.  We would have gone with what we already had, if we could get numbers
on it for NASA, but nobody could come up with that.

The secondary problem is every bit of the weight of the string will be
adding to the payload.  I personally don't think we'll be high enough that
this'll be a problem, but it's not an insignificant concern.

I really like that stuff that David got for Ephemerisle.  I've cc'd him here
so maybe he might be able to share with us where he got it and how much it
was.  IIRC, it was pretty pricey, but came on a big spool that we shouldn't
need.

Christie
_______
"We also briefly discussed having officers replaced by very small shell
scripts." -- Noisebridge meeting notes 2008-06-17

The outer bounds is only the beginning.
http://www.flickr.com/photos/genriel/sets/72157623376093724/


On Tue, Apr 6, 2010 at 11:27 AM, Brian Choate <brian.choate at gmail.com>wrote:

> Do we specifically want to have something that is very thin, almost
> invisible to tether? If that is not super critical we have ~200 ft of cord I
> picked up to use as the main payload tether.
>
> B.
>
> On Tue, Apr 6, 2010 at 9:12 AM, Christie Dudley <longobord at gmail.com>wrote:
>
>> You might also ask some of the knot/boat enthusiasts.  You're likely to
>> get a lot more than you wanted to hear with advice, but they can probably
>> point you in the right direction.  I think Shannon is on this list, but also
>> David knows quite a lot about low-weight high-strength stuff and where to
>> get it.  The stuff he got for Ephemerisle might do quite well for this
>> application.
>>
>> Christie
>> _______
>> "We also briefly discussed having officers replaced by very small shell
>> scripts." -- Noisebridge meeting notes 2008-06-17
>>
>> The outer bounds is only the beginning.
>> http://www.flickr.com/photos/genriel/sets/72157623376093724/
>>
>>
>>
>> On Tue, Apr 6, 2010 at 12:31 AM, Michael C. Toren <mct at toren.net> wrote:
>>
>>> On Mon, Apr 05, 2010 at 11:25:00PM -0700, meredith scheff wrote:
>>> > oh no!
>>> > I just got an email from the kite string place that i ordered out
>>> tethering
>>> > line from- they are out of stock.
>>> > does anyone know any local kite string resources?
>>>
>>> High Line Kites in Berkeley is awesome:
>>>
>>>    http://www.highlinekites.com/visit_us.shtml
>>>
>>> You'll have to wait until Thursday to see him, though.  I'd recommend
>>> giving him a call at his office number tomorrow, to confirm he'll have
>>> what you want, and see if he'll maybe let you come pick it up earlier.
>>>
>>> -mct
>>> _______________________________________________
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>>>
>>
>>
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>
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