[PSUBS-MAILIST] bow window

Sun Nov 2 18:34:03 EST 2014

Is this sheet material ? I see rod and tube

Pete
--------------------------------------------
On Sun, 11/2/14, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] bow window
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Date: Sunday, November 2, 2014, 4:34 PM

 Pete,
 Reynolds Polymer will make it as thick as you
 want, they have 7inch in stock.  I asked for 12 inch one
 time and they had that in stock.
 Hank--------------------------------------------
 On Sun, 11/2/14, Pete Niedermayr via
 Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:

  Subject: Re:
 [PSUBS-MAILIST] bow window
  To:
 "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
  Received: Sunday, November 2, 2014, 5:08 PM

  What is
  the thickest off the shelf acrylic ?

  Pete 

 --------------------------------------------
  On Sun, 11/2/14, Cliff Redus via
  Personal_Submersibles <personal_submersibles at psubs.org>
  wrote:

 Subject: Re:
  [PSUBS-MAILIST] bow window
   To:
  "Personal
 Submersibles General Discussion" <personal_submersibles at psubs.org>
   Date: Sunday, November 2, 2014, 1:02 PM

   One

 of my
  goals with the R500 was to cut cost
 and a big cost is
   the viewports.
 The upper portion of the
  pressure hull
 that
   has the viewports is
  36" x 0.25 A516-70 pressure
   vessel
  steel. The design
 depth is 500 ft.   I like the
   optics of
 flat viewports so I have one
  24"
 diameter x
   4" thick acrylic
  viewport and three smaller 12"

  viewports.     I ran
 the calcs using the PVHO flat
   viewport
 calculator that Jon Wallace
  implemented at
 the
   PSubs site.  I have

 access to abrasive water jet so I was

  thinking of jetting these out of off the shelf
 acrylic
  and
   then having
 a machine shop dress the
  edges and cut
 the
   chamfers. I would need
  to get the viewports annealed after
   final
  machining. I am
 hoping I can
    talk Gregg

 Cotrell into doing this for me as he is Dr.

  Acrylic. PVHO has detailed info on what
 the viewport
   housing seat needs to look
 like.
   So to me, I don't see any
 reason
   Vance you could not use large flat
 viewport on
  the bow. 

 You just have to do the PVHO
  calcs on the
 thickness and
   housing

 dimensions for your design depth.  You would need
   to design the housing to smoothly
 transition
  the stresses to
   the forward head and run an

 FEA to confirm stresses in the
   viewport
 and
  housing.  I don't know what size
 you were
   thinking about or the design
 depth but it
  would need be
   thick.

 Cliff

    From: hank pronk
  via
   Personal_Submersibles

  <personal_submersibles at psubs.org>

   To: Personal
   Submersibles General Discussion
   <personal_submersibles at psubs.org>

   Sent:
 Sunday,
   November 2, 2014 7:02 PM

  Subject: Re:
   [PSUBS-MAILIST] bow window

   Lets wait and
 see what the engineers
  think. 
   Cliff is going with a flat port on
  the R500 I believe.
   Hank

 --------------------------------------------
   On Sun, 11/2/14, via

  Personal_Submersibles <personal_submersibles at psubs.org>
   wrote:

  Subject: Re:

 [PSUBS-MAILIST] bow window
    To: personal_submersibles at psubs.org
    Received: Sunday, November 2, 2014,
 12:20
   PM

  That's my
    kind of madness.

 Vance

    -----Original

 Message-----

    From:
 hank pronk via

 Personal_Submersibles
    <personal_submersibles at psubs.org>

    To: Personal
  Submersibles
   General
 Discussion
    <personal_submersibles at psubs.org>

    Sent: Sun, Nov 2,
 2014
  11:53
   am

    Subject: Re:

  [PSUBS-MAILIST] bow
 window

  Vance,
    That is a question
 for the
  engineers of

 coarse.  I look at
    it like the hull is
 a

    big conning
 tower.  Just look how
   Gamma's CT is
 built,

  instead of a
 hatch
   it is 
    a flat
 port.  I know I may be over
    simplifying
 it.  The

  engineers
 are 
   probably 

 thinking I am mad but.....  
    Hank

 --------------------------------------------
    On Sun, 11/2/14, via

 Personal_Submersibles
   <personal_submersibles at psubs.org>

    wrote:

     Subject: Re:
  [PSUBS-MAILIST] bow window

   To: personal_submersibles at psubs.org
     Received: Sunday, November 2, 2014,
  11:13
   AM

     Hank,

 It's not
  crazy at all. I just
   hadn't
     thought of
 it. I wonder if the
   stresses
    imposed at test
     depth
 would be too high

  for the
 1/4" hull the thing
     would
  be
   welded to. It's an
 interesting
  thought,

   though.
     Something to
 consider,

  definitely.

 Vance

     -----Original

   Message-----

     From:

 hank pronk via Personal_Submersibles

   <personal_submersibles at psubs.org>

     To:

  personal_submersibles
     <personal_submersibles at psubs.org>

     Sent: Sun, Nov
 2,
  2014
   10:49 am

     Subject:
   [PSUBS-MAILIST]
  bow
 window

   Vance,
     Have you looked
 at
  a large full
   size
 flat port for the
    front
     of your K350.  I

     did
   that with one
 of
  my early subs.  I had a 24 inch flat

  port 4 inches thick 
     with
   a 24 inch
 protection dome.  The optics were

 stunning,
     nobody believed it 
     was 4
   inches thick. 
 I
  checked with
    Reynolds
 Polymer and a
    7

 inch thick 37inch 
     square
   unpolished piece is
  3,000
 dollars US.  Is that just
     crazy
  talk or what. 

   Hank

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