[PSUBS-MAILIST] bow window

Sun Nov 2 14:27:36 EST 2014

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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