[Space] Tether string issue

meredith scheff satiredun at gmail.com
Tue Apr 6 13:10:09 PDT 2010


paracord sounds great.
we need about 300 feet (60 foot tether + tying length + wiggle room)
mer

On Tue, Apr 6, 2010 at 1:01 PM, Christie Dudley <longobord at gmail.com> wrote:

> You know, paracord sound like it's made for the kinds of things we're
> doing.  Sounds like just the thing, if not this time, next time we run out
> of rope.  Dunno what Meredith has in mind, but I'm betting it'd be easier to
> find than the kite string she's looking at.
>
> 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 12:03 PM, David Stainton <dstainton415 at gmail.com>wrote:
>
>> Greetings,
>>
>> For the ephermerial project I procured a tarred braided
>> (non-rotational) thick twine from:
>>
>> Coast Marine
>> 398 Jefferson Street
>> San Francisco, CA 94133
>> (415) 673-1923
>>
>> However you may not need anything that heavy. I think the breaking
>> strength was around 900 pounds.
>> That is heavy stuff for such a breaking strength. These days I use
>> paracord for almost everything. It comes
>> in several different varieties. Paracord (parachute cord) has got a
>> core of straight fibers surrounded by a braided sheath. It's thicker
>> than kite string but thinner than the stuff I got from Coast Marine.
>> The kind I purchased from TAD Gear has a breaking strength of 550
>> pounds.
>>
>> I know for sure that you can get paracord spools (of 100 feet for about
>> $10) at:
>>
>> TAD Gear
>> 660 22nd St
>> San Francisco, CA 94107
>> (415) 318-8252
>>
>> But also it is probably sold at various hardware stores: call them first.
>>
>> I hope this helps!
>>
>> ~david
>>
>> On Tue, Apr 6, 2010 at 11:50 AM, Christie Dudley <longobord at gmail.com>
>> wrote:
>> > 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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>> >>>> Space at lists.noisebridge.net
>> >>>> https://www.noisebridge.net/mailman/listinfo/space
>> >>>
>> >>>
>> >>> _______________________________________________
>> >>> Space mailing list
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>> >>>
>> >>
>> >
>> >
>>
>
>
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