Re: [PSUBS-MAILIST] Viewport Toughness

["Brian Cox" <ojaibees@ojai.net>]

I have a question about using a glass dome, wouldn't a thick glass dome actually stronger than acrylic?  But it would not be able to be used because of it propensity to shatter under certain types of stresses.    Adam ?

Brian Cox
 
----- Original Message ----- 
From: "Adam Lawrence" <adteleka@in-tch.com>
To: <personal_submersibles@psubs.org>
Sent: Monday, October 06, 2003 7:30 AM
Subject: Re: [PSUBS-MAILIST] Viewport Toughness


> From what I have read, when a viewport breaks it starts by extruding itself
> into the flange and then final failure is like a shotgun going off. Also,
> failure initiates on the inside surface, where the acrylic is in tension.
> Test it, that's the only way you'll know!
> 
> Adam
> 
> 
> ----- Original Message -----
> From: "pierre&marie" <poulin.carrier@videotron.ca>
> To: <personal_submersibles@psubs.org>
> Sent: Monday, October 06, 2003 5:49 AM
> Subject: [PSUBS-MAILIST] Viewport Toughness
> 
> 
> > Hi People!
> >
> > I've been to a house building show here in cold Canada and there was a
> boot
> > that sold "unbreakable" windows for thief.
> >
> > They say that there technologie can change a normal window into a bullet
> > proof window.
> >
> > The basic of that method is to put a high resistance thin plastic film
> that
> > stick on the window. Almost like a windshield. You should see me comming
> > from now... I asked if we can put that film on acrylic and the said yes.
> >
> > Do you think that this could be helpful for psubs? It would not augment to
> > strenght of the viewport but if it break it could prevent water from
> comming
> > inside the sub or prevent the viewport from imploding?
> >
> > Comments?
> >
> > Pierre "Viewport Strenghtener Technicien" Poulin
> >
> 
>