Frank, For last year’s Conference, we made a estimation that it would take about 6 drums to get the conning tower of a partially flooded K-350 safely above the surface to disembark crew safely. As part of an exercise in the parking lot, attendees rigged several drums to George’s sub and it was their conclusion that this would be a difficult exercise underwater especially if deep and even more difficult if the water was cold (visibility would be quickly stirred up if it wasn’t already murky). This was with a group of people familiar with PSUBS and who had just attended a class in rigging the sub. Another determination was that pre-established attachment points down low on the sub (i.e. skids) would be very advantageous. No matter what, the drums would have to be attached at the skids to get the conning tower clear. Towing this disabled PSUB with drums supporting it would open up a bunch of other issues. If I remember correctly, your PSUB has a lot more internal space than a K-350 so much more salvage lift would be required for a partially flooded sub. R/Jay Resepectfully, Jay K. Jeffries Andros Is., Bahamas Save the whales, collect the whole set. From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of ShellyDalg@aol.com Hi Jon and Ray. Yes, 55 gallons of displacement will weigh about 8 pounds per gallon, but items weigh a lot less when submerged, so 55 gallons of air will raise more than the "dry weight" of an object when submerged. Now a 55 gallon drum ( not counting the drum itself ) could raise 400 plus, clear of the water, but just getting it off the bottom is what I was referencing. We're talking about getting a psub to come back to the surface, not get it up on the trailer. Frank D. |