[PSUBS-MAILIST] Hull Calc: 78" spheres

[hank pronk via Personal_Submersibles]

BBQ, I hate you :-)  it is- 10 here right now lol
Hank--------------------------------------------
On Fri, 1/9/15, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] Hull Calc:  78" spheres
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Friday, January 9, 2015, 10:27 PM
 
 Hank,do
 you know what aluminum they are & is that 60"
 OD?I
 will put it through my calculator if I have the material
 in the
 data base. But not till after BBQ; nice hot day here in
 Auckland:)Sean
 might beat me to it & have  a more reliable
 result.Alan
      
   From: hank pronk via
 Personal_Submersibles
 <personal_submersibles at psubs.org>
 
 To: Personal
 Submersibles General Discussion
 <personal_submersibles at psubs.org> 
 
 Sent:
 Saturday, January 10, 2015 4:16 PM
  Subject: Re:
 [PSUBS-MAILIST] Hull Calc:  78" spheres
    
 
 just to make things
 interesting.  I found two aluminum 60 in spheres 3 in thick
 wall and maybe 6 in thick flange.  They appear to be cast
 and perfectly round.
 Hank--------------------------------------------
 On Fri, 1/9/15, Sean T. Stevenson via
 Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
  Subject: Re:
 [PSUBS-MAILIST] Hull Calc:  78" spheres
  To: "Personal Submersibles General
 Discussion" <personal_submersibles at psubs.org>
  Received: Friday, January 9, 2015, 10:07 PM
  
  
      On
 2015-01-09
  18:16,
       
 swaters at waters-ks.com
  via Personal_Submersibles wrote:
  
      
    
  
        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
  
      
      Not sure where you're going with
 this.  The
  60" sphere doesn't
 even
      make it at 1" thickness. 
 A 72" definitely
  won't.
  
      
  
      72" OD, 1" wall, ASTM A516
 Grade 70:
  
      
  
      
  
      
  
    
  Just out of interest, I checked how small a sphere with
  1" thick
      hull
 would need to be to get you to 1000m.  Turns out
  it's about 50
     
 inches:
  
      
  
      
  
      
  
    
  Sean
  
      
  
    
 
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