[PSUBS-MAILIST] window opening

[Jon Wallace via Personal_Submersibles]

Conical makes more sense given the dimensions.  Definitely a stachiw book lookup.  Again, I’ll check Sunday evening if nobody beats me to it.  I’m in Ontario by the way, eh?  :)  :)


--------------------------------------------
On Fri, 7/13/18, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] window opening
 To: "Jon Wallace via Personal_Submersibles" <personal_submersibles at psubs.org>
 Date: Friday, July 13, 2018, 9:03 PM
 
 
         Hi Jon,Thank you,  the port is
 conical 14in  OD and 6 in ID and 3 in thick.  The new
 opening will be 8 inches, so I will just machine the port
 thinner on the inside. The bearing surface, or conical seat
 will be shorter also.  This will require some  math to
 figure out.Hank
 
         
         
             
                 
                 
                     On Friday, July 13, 2018, 6:35:28 PM
 MDT, Jon Wallace via Personal_Submersibles
 <personal_submersibles at psubs.org> wrote:
                 
                 
 
                 
 
                 Hank, this is a flat
 disc port?  If so, it doesn’t fit typical recommended
 configuration by Stachiw which is OD = ID * 1.25
 
 I have to assume that such
 a large OD/ID ratio as you have described was used to
 increase depth capability without getting into a more
 expensive conical or spherical segment configuration.  I
 dont have access to stachiws book right now to see if he has
 a calculation based upon the ratio.  If nobody answers
 sooner I’ll look it up Sunday evening when I return home.
 
 
 Jon
 
 
 --------------------------------------------
 On Fri, 7/13/18, hank
 pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
  Subject: [PSUBS-MAILIST]
 window opening
  To:
 "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
  Date: Friday, July 13,
 2018, 7:09 PM
  
  Hi All,I need
  help to figure out the
 depth rating of my port in E3000.
   Right now it is a copy of a  P6 port at 14
 inches
  od and 6 in ID
 and 3 inches thick.  I want to open the
  port frame up to 8 inches
 ID from 6 inches ID.  The
  thickness of the port will reduce by about
 1\4 inch.
   I need
 to know how much this will impact the depth
 
 rating.Hank_______________________________________________
  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
 
             
         _______________________________________________
 Personal_Submersibles mailing list
 Personal_Submersibles at psubs.org
 http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
 
 -----Inline Attachment Follows-----