[PSUBS-MAILIST] Hull Calc: 78" spheres

[hank pronk via Personal_Submersibles]

I was able to correct it, and you are right, I was not clear enough.  I assumed, and that is a mistake.
EE is still awesome.
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, 9:46 PM
 
 Yeah, you really need to cross your t's and
 dot your i's when tendering a bid or ordering a part to
 specification. Anything not explicitly spelled out is
 subject to interpretation or disregard.  I always create
 completely dimensioned and toleranced engineering drawings
 for this purpose, in addition to material specifications and
 test performance requirements, and make clear that if the
 part doesn't pass QC, the supplier is responsible for
 correcting the problem. I get such an agreement signed. Of
 course, I have the benefit of having been doing this
 professionally for years. Strict hobbyists cannot be
 expected to be as informed.
 That said, I would take the required
 tolerances, roundness, test procedures and so forth right
 out of the guides, and present this when getting quotes so
 that I get the true cost for what I need, and discover right
 away if it is not within a supplier's capabilities.
 How did your dome turn out? Were you able to
 correct it?
 Sean
 
 
 
 
 On January 9, 2015 7:29:44
 PM MST, hank pronk via Personal_Submersibles
 <personal_submersibles at psubs.org> wrote:
 
 Sean,
 EE did my parts and my dome was quite bent when
 sitting on the bench.  They told me too bad, it is within
 ASME specs.
 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, 9:24 PM
 
 
  I never thought to add the functionality
 to solve
  for diameter. I'll have to
 look into that.
  I'll run your calc.
 Stay tuned.
  Sean
  
  
  
  
  On January 9, 2015 6:16:50
  PM
 MST, "swaters at waters-ks.com via
 
 Personal_Submersibles"
 
 <personal_submersibles at psubs.org> 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 1000!
  m. 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"  
  Date:01/08/2015  8:28 PM  (GMT-06:00) 
  To: Personal Submersibles General Discussion
 
  
  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
  
      
  
    
  
  
  Personal_Submersibles
 mailing list
 
 Personal_Submersibles at psubs.org
  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
  
  -----Inline Att!
  achment
 Follows-----
  
 
  Personal_Submersibles
 mailing list
 
 Personal_Submersibles at psubs.org
  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
  
 
 
 Personal_Submersibles mailing list
 Personal_Submersibles at psubs.org
 http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
 
 -----Inline Attachment Follows-----
 
 _______________________________________________
 Personal_Submersibles mailing list
 Personal_Submersibles at psubs.org
 http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles