Re: [PSUBS-MAILIST] Through Hull Connections

[Jeff Post <jeffpost@rawbw.com>]

So I guess this begs the question of how the submersibles that actually do use
an acrlic sphere pass wires and the like. Do they drill holes and have plates
through bolted? I know some have spheres that are clamped together, and likely
everything is inside with no penetrations. Peter, how about using the sphere for
the human occupancy part only, and have the batteries, motors, etc. outside. You
could have optoelectronic controls which wouldn't need any holes.

This is a good question for Phil, or someone really in the know.

Jeff

Quoting mckellar@earthlink.net:

> Hi Warren and Dan,
> 
> d@mn!! - this half-hearted attempt at self-censorship is a major concession
> 
> - im aussie and the expletives flow naturally :)
> 
> I really had my heart set on acrylic, even recognising that some components
> 
> would likely end up metal :(  my 'ABSOLUTELY MUST BE' generally gets warped
> 
> so much its bears no similarity to the original intent :)
> 
> but, back to the ridiculous and unreasonable - could induction be used to 
> pass a current thru the hull without the heat buildup issues?
> 
> the differential expansion problem seems equally intractable :(  Even more 
> so than the problem of hull penetration.  I had considered imbedding  some 
> components permanently in the hull, despite the replacement and upgrade 
> considerations, im going to have to think this one thru too :( - 
> suggestions welcomed :)
> 
> all assistance appreciated
> peter
> 
> 
> 
> 
> At 18:05 4/29/03 -0700, you wrote:
> >Be careful with acrylic. A metalic onject embedded in
> >acrylic with shrink and expand at a different rate,
> >and that can cause acrylic to fail explosively (when
> >under pressure).
> >
> >Warren.
> 
> 


-- 
Jeff Post

Everything can be inherited except sterility.