[Discuss] Near-space balloon: Foam ball located and purchased

Kevin King EMAIL HIDDEN
Mon Oct 31 13:57:52 PDT 2011


I was also going to recommend running the line through the bottom of the sphere 
to lock everything together.  Possibly with an additional eyelet at the base 
were additional payloads could be clipped to.  I think it would also be good to 
coat the entire sphere with a hard laminate coating.  It would greatly increase 
the strength of the sphere.  We could also place bright LEDs on all "Sides" 
wired for a strobe effect to aid in recovery.




________________________________
From: Laura Harris <EMAIL HIDDEN>
To: Ben Hallert <EMAIL HIDDEN>
Cc: "EMAIL HIDDEN" 
<EMAIL HIDDEN>
Sent: Mon, October 31, 2011 1:29:28 PM
Subject: Re: [Discuss] Near-space balloon: Foam ball located and purchased


Ohh- that looks good, Ben. 


One idea for holding the halves together is to use a pair of extra-long nylon 
zip ties running longitudinally at 90 degrees to each other- grooves formed in 
the surface would keep them from sliding off. They're strong and light and they 
avoid the need for any hardware.



________________________________
From: Ben Hallert <EMAIL HIDDEN>
To: Laura Harris <EMAIL HIDDEN>
Cc: Rick Osgood <EMAIL HIDDEN>; 
"EMAIL HIDDEN" 
<EMAIL HIDDEN>
Sent: Monday, October 31, 2011 1:12 PM
Subject: Re: [Discuss] Near-space balloon: Foam ball located and purchased

May I suggest that instead of attaching the cord to the top, we run it
down and attach it to where the battery bay is?  This way the whole
thing is 'sitting' on the cord and we can cut any weight created by
reinforcements that would reach to the top of the sphere.  Namely, the
only 'strength' needed would be at the bottom where it's already
planned to exist.  This also reduces risk of retrieving just the top
of the sphere.  :)  I've attached a modified version of the drawing.

- Ben



On Mon, Oct 31, 2011 at 12:51 P.M, Laura Harris <EMAIL HIDDEN> wrote:
> The ball comes split in half so it's just a matter of holding it together in
> flight. I've attached a pic of a sketch showing a preliminary idea for
> construction.
>
> ________________________________
> From: Rick Osgood  <EMAIL HIDDEN>
> To: Laura Harris <EMAIL HIDDEN>
> Cc: "EMAIL HIDDEN"
> <EMAIL HIDDEN>
> Sent: Monday, October 31, 2011 10:54 AM
> Subject: Re: [Discuss] Near-space balloon: Foam ball located and purchased
>
> Sweet!  Do you plan to mold something around the sphere?  I'm curious to see
> your final design and how we will be able to open it up and  mount
> everything.
>
> On Mon, Oct 31, 2011 at 9:53 AM, Laura Harris <EMAIL HIDDEN> wrote:
>
> I found a 12" dia hollow polystyrene foam ball and purchased one. Should be
> here in a few days. This is it:
> http://www.plasteelcorp.com/mm5/merchant.mvc?
> This dramatically accelerates the build progress. :)
> L
>
>
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