Re: [PSUBS-MAILIST] Using a commercially available hatch as an emergency esca...

[Coalbunny <coalbunny@onewest.net>]

Now I'm curious.  If a sub's hull can do a depth of say, 900 feet, but
is limited because the glass/lexan/plexiglass won't go below 200 feet,
wouldn't it help some if you were to back the porthole material with
something like an expanded steel screen?  That way, in the event of an
accident, the porthole does not explode inward.  Yes water does get in,
but not in the explosive manner.  Of course this is theory only, so tell
me where this idea is wrong.
Carl


DBACKIDS@aol.com wrote:
> 
> Quick note on using Lexan: If you plan on cutting it yourself, be careful,
> for it shards like a glass would, not melts right through like plexi would.
> (I built a 5" x 9" x 3' long "wet wind tunnel" (a wind tunnel, with water
> instead of air), and found out that plexi, when cut fast, practically melts
> itself back together, while lexan will shard off unless it is covered or
> taped. It was a fun project, too) Ok, I went off-track, but you got the
> point.

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