[PSUBS-MAILIST] Hull Calc: 78" spheres

[swaters@waters-ks.com via Personal_Submersibles]

Sean,
Can I ask you to do one more calc for me? 516 gr 70 sphere, 1" thick, 72" diameter. 
The 78" was not within ABS rules at 1000m. I think the 72" might just make it, yet give me more boyancy than the 60"
Thanks,
Scott Waters


Sent from my U.S. Cellular® Smartphone


-------- Original message --------
From: "Sean T. Stevenson via Personal_Submersibles" <personal_submersibles at psubs.org> 
Date:01/08/2015  8:28 PM  (GMT-06:00) 
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Subject: Re: [PSUBS-MAILIST] Hull Calc:  78" spheres 

On 2015-01-08 19:01, via Personal_Submersibles wrote:
That's what I got. Only without the format. Sweet. Thanks Sean. It's going to take a syntactic buoyancy package to get it right, but it looks like a decent alternative. A 6 1/2 foot sphere displaces about a thousand pounds more than the pair of 5 footers. Pretty close, and might be marginally less expensive. What would a 39" radius do for depth in the thicknesses you have already given?
Vance

As requested:

ASTM A516 Grade 70, 78" sphere, 0.75" wall:



ASTM A516 Grade 70, 78" sphere, 1" wall:


HY-100, 78" sphere, 0.75" wall:


HY-100, 78" sphere, 1" wall:


Sean

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