[PSUBS-MAILIST] (no subject)

[vbra676539 at aol.com]

Hank,
I'd think seriously about throwing rocks aboard and climbing in to do a ten-twenty foot dive at the dockside with a flashlight in hand. Vacuum check was good. You should be okay, but that cold water will make things shrink at different rates. Those viewports seated fine in the shop. What about in the water? Then if it all looks good, haul her out deeper and stage it down. Try a hundred feet and bring it back to check. If it holds shallow, then see if it holds at 250. Then 500. You've got the good gaskets, so once they take a set, they should hold. The New Orleans boys were convinced that neoprene would do the job and didn't test until they got to the Bahamas. Then they had to bail the boat out and suspend operations until the real gaskets arrived from the States. And THEN they had to tear every penetration down and replace every gasket in the boat. You know by now just how much fun that must have been. As in, no fun at all. That said, I'd still be puckered doing this in such cold water. In fact, I'll be puckered all the way down here in Florida. Do you have phone communications out there at the lake? I'm going to be sweating this one right along with you, so I would definitely appreciate a call when it's over.
Vance



-----Original Message-----
From: Joe Perkel <josephperkel at yahoo.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Fri, Feb 7, 2014 7:28 pm
Subject: Re: [PSUBS-MAILIST] (no subject)



Hank,


What I don't like about deep water remote testing, is the fact that we are testing against the worst case scenario, a sub full of water. The good news of course being unmanned.


Therefore to my mind we must be prepared for that worst case scenario, meaning being in the best possible position to recover the sub. That means heavy lifting doesn't it?


Sending a grapple down a line requires 100% success in making contact, is that assured? I don't know I've never done it.


So if I had the means to send it down on a cable, that's what I think I'd do.


Joe




On Feb 7, 2014, at 6:08 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:




PROBLEM, now that I am getting Alec's auto pilot, I run the risk of the sub surfacing violently if it develops a leak and the water sensor tells the sub to surface.  If I have my steel barge above Gamma there could be a very serious collision.  The other option is to forget the barge and send Gamma down with a rope attached as a locator and a way to slide a cable down to retrieve it.  The rope only needs a rubber float to locate it.  I would put a second auto pilot in that relies on a battery going dead to make it surface with a separate hp source.
What to do hmmm
The other option is use the auto pilot from Alec without the water sensor and have the barge over Gamma with the cable between.  Then there is a safety if the cable fell off or what ever, and if the sub fills with water I can winch it up. 
Hmm , what do you guys think.
Hank


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