Brian,
I am a commercial diver and in the late 70des when the 12 gage bang stick came out they made one with a four foot stick and when you shot it off the shock wave would knock you out so they stopped making the four foot one and went to the six foot one and it still made you feel a little weird under water be careful the shock wave does all the damage. So think about the difference in the pressures of the depth you are working in and the explosion of the ordnance and see if you have a safe fudge factor.
John Hodorek
--- On Wed, 6/23/10, Jon Wallace <jonw@psubs.org> wrote:
From: Jon Wallace <jonw@psubs.org>
Subject: Re: [PSUBS-MAILIST] Acrylic
To: personal_submersibles@psubs.org
Date: Wednesday, June 23, 2010, 8:14 PM
Brian, Check out this site http://www.fas.org/man/dod-101/navy/docs/es310/uw_wpns/uw_wpns.htm for some seemingly good info on the topic although I can't speak to it's accuracy. Do a search for underwater explosions on the internet and you'll find some other good information as well. I assume you are talking about the submarine, presumably some distance away from the sunken vessel, and not the ROV which would presumably be in the immediate vicinity of the explosion (possibly responsible for it). As the above web site illustration shows, the bulk of damage is due to the expanding "steam void" when it is in contact with the vessel. Simply speaking, the acrylic windows would be expected to fail if the pressure wave reaching them exceeds the amount of pressure they are
designed to resist. Whether they develop small cracks or fail catastrophically is beyond our experience I think. Jon On 6/23/2010 12:32 PM, Brian V. Ryder wrote:
Does anyone know how acrylic windows would handle a small explosion under water, just occurred to me that the cargo hold we are working on had explosives in it also hopefully the 700 foot depth has flooded them over the past 70 years
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