Re: [PSUBS-MAILIST] Argonaut Junior replica

[Dan h <machine@epix.net>]

I think to build such a craft one would be require more knowledge of
submarines and what makes them tick then automotive engineering.  Heck, "go
cart engineering" would be enough to move you slowly along the bottom but to
build a craft that will withstand and function under water is the bigger
challenge.

Flat panels are a problem though.  Wood, even worse.  You mention a strong
frame would be needed.  The strength of the box required for only a few feet
of water depth would be far stronger then that required to span 14 feet
between two supports.  In water, your box hull wouldn't need much support to
keep from sagging in the middle in comparison to the support needed to keep
from collapsing.  The box shape itself is strong in rigidity, but it's the
weakest form to work with because of the waters forces on it at depth.  Your
considering a big box with a lot of surface area, and also a lot of
displacement.

Dan H.

Michael B Holt wrote:

> It's not powered in the water:  there's no screw or paddles, and it's
> made
> to drive along the bottom.   What this leaves me facing is a wood box
> that's 14 feet long, 4 feet wide and 5 feet high, rolling along the
> bottom
> on three wheels.   Making the whole thing even better is that it's not a
> "submarine" in the usual sense, but really a mobile diving bell.
>
> I have a feeling it's going to demand automotive engineeering.  How
> can I maintain the rigidity of the 14x4 bottom?   Some kind of chassis
> will have to be built into the thing; not even my current hope of having
> a laminated three-layer bottom of plywood will provide the strength
> needed.
>
> Does anyone know of any mailing lists concerning homebuilt
> automobiles?   I think I'm on the boat design list that contains
> the experience to make this possible.
>
> Mike H.
>
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