Re: [PSUBS-MAILIST] Viewport design question

[Michael Holt <mholt@ohiohills.com>]

Rob Ossian wrote:

> Hi Carsten,
>
> First let me say that I have a tremendous amount of
> respect for what you have accomplished and for your
> experience in this field, but I still have some
> questions about rectangular windows.
>
> This issue kept nagging at me last night as I tried to
> think of ways to compensate for the angular edges,
> until my mind began to wander and I started thinking
> about SeaWorld. ;-)
>
> These Aqaurium parks have enormous rectangular windows
> 40 feet across that hold back tons of water pressure
> without any leakage problems.  Technically, the
> argument could be made that since that they can handle
> this water pressure becuase it is focused directly at
> their planed surface head-on, but if sufficient
> engineering is implemented to the sub's design the
> concept should be applicable.
>  
There's no cycling of pressure with those windows.  Once the
pressure is on them, it never changes.   Fatigue is almost
impossible, so there's no reason to worry.  Also, the pressure
is a lot less than most of us contemplate.  How deep are the
tanks?   Thirty feet at most?

> Then, while researching further I came across these:
> http://news.bbc.co.uk/olmedia/1330000/images/_1332322_windows_300.jpg
> http://news.bbc.co.uk/olmedia/1615000/images/_1617932_windows_300.jpg
> http://members.fortunecity.com/omegatimes/mdf100041.jpg
>
> These images are of right angled windows embedded in
> the conning tower of a Russian Antey-class [NATO name
> 'Oscar II'] nuclear submarine, which has been claimed
> to be capable of diving to 600 metres (about 2000
> feet).  
>  
Typically, those windows are for the bridge folk while surfaced in
bad weather.  There's no pressure hull involved.

What's the text behind the images?


Mike




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