Re: [PSUBS-MAILIST] wooden hull Psub revisited

[CARRO@wans.net]

Can you PRINT SCREEN then paste to PAINT and SAVE AS a JPEG?
--- Original Message ---
From: "Eliezer Rodriguez" <eliezer_rodriguez@hotmail.com>
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] wooden hull Psub revisited

>Hi;
>
>I find this topic very interesting, as myself was considering the idea 
>because of both reasons you stated below, "where budget (and presumably
>depth) is limited". I will be very happy to see the picture of it. Can it 
be 
>scanned, Micheal?
>
>Regards,
>
>
>Eliezer Rodriguez
>"The only thing in life to fear is fear itself."
>
>
>>From: Michael Holt <mholt@richmond.edu>
>>Reply-To: personal_submersibles@psubs.org
>>To: personal_submersibles@psubs.org
>>Subject: Re: [PSUBS-MAILIST] wooden hull Psub revisited
>>Date: Fri, 22 Mar 2002 11:07:58 -0500
>>
>> > John Gaertner wrote:
>> >
>> > I recently rejoin the Psub mail list after a two year break. I have
>> > been looking into the use of wooden "doughnuts" as a means of building
>> > a 1 atm. 100 ft max diving depth psub for personal use. I reviewed the
>> > archives but unfortunately those who commented on it, their email
>> > addresses bounced back. So I would like to open the floor up for
>> > discussion...
>>
>>Welcome back, John.
>>
>>The wooden donut idea goes all the way back to the 60s, with
>>Helle Engineering the Submanaut.  It's in Busby on page 221
>>and on page 250.  Busby lists a collapse depth of 2000 feet
>>and an operating depth of 200 feet.
>>
>>Jerry /Stachiew even wrote about it, in Underssea Technology
>>magazine (Sept., 1968).  I've never read that article.
>>Busby's review of the article notes that Stachiw felt plywood
>>has a place in submarine hulls where budget (and presumably
>>depth) is limited.
>>
>>I talked with Mr Helle (his first name eludes me right now),
>>in about 1989.  The boat was out of the water but in good
>>condition.  His wife wanted to give me the boat, but he
>>hesitated (of course it works like that).  He said there
>>never were any problems with it.
>>
>>According to Busby, the technique is to cut 4-inch wide
>>ring panels from the wood.  The rings are glued together
>>and the whole is glassed over.
>>
>>I suspect a problem would arise if the boat were going
>>to spend all its life in the water, or if it were cycled
>>too often.  ne might have to very careful about how
>>the boat were launched, because the plywood might crack
>>internally if the stress were not evenly distributed as
>>it began to float.
>>
>>
>>
>>Mike
>
>
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