[PSUBS-MAILIST] bow window

Sun Nov 2 16:45:57 EST 2014

Well that may give it a tendency to have a great view of the bottom.

Hugh

-----Original Message-----
From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
On Behalf Of hank pronk via Personal_Submersibles
Sent: Monday, 3 November 2014 8:44 a.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] bow window

Vance,
One down side to this idea is weight, a 37 inch di by 7in thick window is
about 284 lbs.
Hank--------------------------------------------
On Sun, 11/2/14, Vance Bradley 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, 2:36 PM

 Which
 viewport?

 Sent from my
 iPhone
 On Nov 2,
 2014, at 2:30 PM, Cliff Redus via Personal_Submersibles
<personal_submersibles at psubs.org>
 wrote:

 On
 this calc, the operating depth is 350 ft and the crush depth  of the
viewport is 2130 ft.

 Cliff
         From: Vance Bradley via
 Personal_Submersibles
  <personal_submersibles at psubs.org>
  To: Personal
 Submersibles General Discussion <personal_submersibles at psubs.org>

  Sent: Sunday, November
 2, 2014 8:27 PM
  Subject: Re:
 [PSUBS-MAILIST] bow window

 Operating 350
 feet. Test depth 500.

 Sent
 from my iPhone

 On Nov 2,
 2014, at 2:19 PM, Cliff Redus via Personal_Submersibles
<personal_submersibles at psubs.org>
 wrote:

 Is the design
 depth 350"?
 Cliff

         From: Vance Bradley via
 Personal_Submersibles <personal_submersibles at psubs.org>
  To:
  Personal Submersibles General Discussion <personal_submersibles at psubs.org>

  Sent: Sunday, November
 2, 2014 8:06 PM
  Subject: Re:
 [PSUBS-MAILIST] bow window

 Cliff,
 I'm thinking full hull diameter, 36" or  thereabouts.Vance

 Sent from my iPhone

 On Nov 2,
 2014, at 2:02 PM, Cliff Redus via Personal_Submersibles
<personal_submersibles at psubs.org>
 wrote:

 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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