Re: [PSUBS-MAILIST] K-250 questions about the acrylic dome

[Alan Winick <subguy33@yahoo.com>]

True, the K-250 dome is not PVHO. However, it does
have a flange of sorts. Not a true equatorial flange,
but a cemented ring just slightly north of the rim.
It's the bearing surface for the clips that hold the
dome in place. It was Kittredge's configuration and
has worked well. 

Alan
--- Cliff Redus <dr_redus@devtex.net> wrote:
> Thanks for info Dan.  
>   ----- Original Message ----- 
>   From: Dan H. 
>   To: personal_submersibles@psubs.org 
>   Sent: Tuesday, August 05, 2003 8:43 PM
>   Subject: Re: [PSUBS-MAILIST] K-250 questions about
> the acrylic dome
> 
> 
>   Cliff    
> 
>   Although they have been used on many subs for many
> years, the dome of a K-250 is not to present day
> standards.  It is a free blown bubble blown in a 1/2
> inch thick sheet. It's not a cast dome.  As a result
> of blowing the dome it is thinner then 1/2 inch at
> the top.  
> 
>   The outside radius is 12 inches.
> 
>   There is no flange on the dome.  It is just a half
> sphere.
> 
>   Dan H.
>     ----- Original Message ----- 
>     From: Cliff Redus 
>     To: personal_submersibles@psubs.org 
>     Sent: Sunday, August 03, 2003 6:46 PM
>     Subject: [PSUBS-MAILIST] K-250 questions about
> the acrylic dome
> 
> 
>     Can someone with plans for the K-250 answer some
> questions about the acrylic dome:
> 
>     1) Is the dome an ASME/ANSI PVHO hemispherical
> window with equatorial flange?
>     2) Dome outside radius ( Ro in ASME/ANSI PVHO
> nomenclature)
>     3) Dome thickness ( t)
>     4) If hemispherical viewport with equatorial
> flange, what is the flange width (M in ASME/ANSI
> PVHO nomenclature)
>     5) Flange thickness 
> 
>     Thanks in advance.
> 
>     Cliff Redus


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