Re: [PSUBS-MAILIST] wooden hull Psub revisited

["Eliezer Rodriguez" <eliezer_rodriguez@hotmail.com>]

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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