Re: [PSUBS-MAILIST] Concrete Hull material

[Paul Kreemer <paulkreemer@gmail.com>]

I think it's an interesting idea.  I was thinking that the internal form would be the hard part of a concrete sub but a propane tank might make a good start!  Could it be that this would be a less controversial use for propane tanks in sub construction?  :-)  Then you'd just need some lumber framing skill to build the exterior part of the mold.  


It'd be interesting to see a discussion of:
*  rebar design
*  hull penetration design (ports, plumbing, hatches...)
*  concrete forumulas - mixing your additives (latex, fibers, etc.) , and
*  eliminating voids in your pour

After drawing the simple cross-section here my thought was, "Yeah, a concrete sub won't build itself."  Rolled steel still seems attractive to me.


Paul

On 12/29/05, Carsten Standfuss <Merlinsub@t-online.de> wrote:

I do not agree..

You can use for example a propane tank as "Inliner " Warp around some
foot of concrete, cover this with tear and this hull can dive thousands
of foot deep.

We have here in the shipping museum a small 40 feet tug boat made from
strong concrete. Looks still operable - its from short after
world war II. :-) Metall was expensive during this period here in
Germany ..

Some new pictures on moki:

http://www.prismnet.com/~moki/subfiles.html

regards Carsten



rick miller schrieb:
>
> guys
>
>     the discussion on concrete hulls reminds me of the home built boat craze
> in the 70's using concrete hulls. while concrete is strong, it is very
> fragile and does not take well to impacts. this sound like another propane
> tank conversation.
>
> rick m



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