RE: [PSUBS-MAILIST] OSS viewports

$800 I believe.

-----Original Message-----
From: Herman Cini [mailto:hermancini@yahoo.co.uk]
Sent: Wednesday, June 25, 2003 12:42 PM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] OSS viewports

HI there. I am new to the discussion although I have been following the site foe the last three years. I am consoidering to build a 2 man 1 ATM psub in Malta (Europe), with a max depth of 100 meters as the water is very deep here.

Can anyone tell me the cost of the acrylic domes used in the K250 sub.

Thanks

Herman Cini

Alec Smyth <Asmyth@changepoint.com> wrote:

I think one reason they are not popular is that they are not in Stachiw’s book, nor in PVHO either. Hence although I’ve seen them on subs like Nekton, I am not aware of good detailed documentation to use in their design calculations. I know they have worked safely for years on the Nekton, but personally I would feel quite nervous about the potential concentration of stress in all those holes near the rim.

Alec

-----Original Message-----
From: Thijs Struijs [mailto:thijs-struijs@planet.nnl]
Sent: Tuesday, June 24, 2003 1:50 PM
To: PSUBS
Subject: [PSUBS-MAILIST] OSS viewports

When you look at Bill's viewports (http://www.giffordmarineinc.com/sub/sub_5_16_03/Sub_5_16_03.html) you can see that he uses an acrylic disc bolted to a flange. The Nekton subs use a similar method. The Delta is probably the most sucsesfull small sub ever built. Yet i cannot find anything on them in the ABS or Lloyds rules or in Stachiw's book.

It is a simple and cheap way to make the viewports. Flanges can be bought of the shelf. No need for a big lathe and no retainer-rings to make. Can anyone explane me why it is that these viewports aren't more popular.

Thijs Struijs

The Netherlands

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