[PSUBS-MAILIST] Hull Calc: 78" spheres

[via Personal_Submersibles]

Sean,
Thanks for that. 19 mm is .75"(ish). That suggests Leo must have been an inch thick or maybe the classic thickness hull for a Pisces, which was 1.1". The extra 5-6 mm would probably have supplied sufficient strength for 600 meters service.
Vance



-----Original Message-----
From: Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Thu, Jan 8, 2015 9:28 pm
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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