Re: [PSUBS-MAILIST] PSUB Fatalities...View Ports

["Dan J. Rice" <dan.j.rice@sherwin.com>]

"they both would go" Not if the force were at an impact point.  The force of a
point of impact, say running into a rock. would be concentrated on the small
area in contact with the outer pane.  While the inner pane would "feel" the
pressure, it would be evenly distributed over the entire surface.

Dan




"Greg Teiber" <wolfe19@megsinet.net> on 03/07/2000 12:16:13 PM

Please respond to personal_submersibles@psubs.org

To:   personal_submersibles@psubs.org
cc:    (bcc: Dan J. Rice/EST/Sherwin-Williams)

Subject:  Re: [PSUBS-MAILIST] PSUB Fatalities...View Ports



oil between the panes would be against the point of hacing 2 windows.  the oil
would transmit 100% of the pressure from one window to the next, so as soon as
one blew, they both would go.

*********** REPLY SEPARATOR ***********

On 3/6/00, at 5:26 PM, DSmith4038@aol.com wrote:

>On view ports: I have not seen or at least noticed subs that
>have protective round metal bars or cages to prevent collision damage to view
>ports. You see this on the head lights of race cars and off road vehicles.
>                  These cages would subtract from your vision but may be
>worth while safety features on "selected" view ports that are the most at
>risk i.e the front ones. You could drive right into a rock wall and only bend
>your crash bars a bit. I would hate to directly shock a view port at any
>depth.
>                  Double view ports may also be a good idea as previously
>mentioned. I have seen this used for other purposes with a clear oil between
>the glass. This way it appears as though you are only looking through one
>pane only. Cost might be a limiting factor for Psubs using this method.
>                  Now,  we could borrow some technology from the "Batmobile".
>Press a panic button and the whole sub gets covered in armour plating. "Holy
>seahorses in my jockeys Batman"!!!!!
>Regards Doug