[PSUBS-MAILIST] bow window

Sun Nov 2 18:42:25 EST 2014

Pete,
It is R-Cast acrylic, not sure how it is identified, must be sheet.
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, 6:34 PM

 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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