[PSUBS-MAILIST] bow window

Sun Nov 2 17:34:07 EST 2014

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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