[Discuss] Near-space balloon: Will need to source balloon

Kevin King EMAIL HIDDEN
Tue Nov 1 17:07:35 PDT 2011


We should have two on hand in case one breaks during launch, as advised by 
Rick.  Also, we should start tracking the weight for all objects so we have a 
good idea of our required lift weight.  This will help determine the balloon 
size requirement.  If we want to get to +120k, a 1200 gram balloon is 
recommended.





________________________________
From: Laura Harris <EMAIL HIDDEN>
To: Ben Hallert - Vipmail <EMAIL HIDDEN>
Cc: "EMAIL HIDDEN" 
<EMAIL HIDDEN>
Sent: Tue, November 1, 2011 4:52:53 PM
Subject: Re: [Discuss] Near-space balloon: Will need to source balloon


We may want to go a little bigger so we have a little wiggle room.  112 ft^3 
generates right at 7 lb L at standard temp and pressure. 




________________________________
From: Ben Hallert - Vipmail <EMAIL HIDDEN>
To: Laura Harris <EMAIL HIDDEN>
Cc: "EMAIL HIDDEN" 
<EMAIL HIDDEN>
Sent: Tuesday, November 1, 2011 4:20  PM
Subject: Re: [Discuss] Near-space balloon: Will need to source balloon


Ballionsdirect.com (just googled weather balloons) has 5.5 ft diameter balloons 
with 5.5lb capacity for $34.  This seems quite doable.  How much roughly should 
the 80-90 ft^3 of He cost?

- Ben

On Nov 1, 2011, at 4:10 PM, Laura Harris <EMAIL HIDDEN> wrote:


I spoke to Vance today and he couldn't find the two balloons he thought he could 
donate, so we'll need to source a balloon. I did a quick look online and there 
are plenty of sources but if anyone has a known-good source, please let us  
know. 
>
>
>Laura
>
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