[PSUBS-MAILIST] publicity

Wed Jun 17 16:35:29 EDT 2020

Actually, a 350 is the same as a 250, only with T ribs rather and L-angle ribs -- I've got pages of hand written calculations that show crush depths -- don't remember them offhand, but I'll try to dig some of that stuff out for you -- all of this was done by hand and on a slide rule, of course. Vance

-----Original Message-----
From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Wed, Jun 17, 2020 3:59 pm
Subject: Re: [PSUBS-MAILIST] publicity

Thanks for the history Vance, it's fun to hear the history of what he was up to during his career. Unfortunately some country's are that way, you find it, we get it. I would think that he would of known the calculated crush depth of all three models he built since he was selling them to the public. Does anyone know what the 350 is calculated for crush?I know there is a formula for doing stuff like that but that is way above my pay grade.
Rick
On Wed, Jun 17, 2020 at 8:16 AM via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

True in parts. George tested an early K-250 in the Navy test tank in Annapolis. His buddy the Admiral was a structural design engineer of Navy subs, and had done the figures on the little sub's hull. The boys at the shop in Maryland didn't take them seriously. They figured the whole thing would implode at about twenty feet. George knew better. He told them the first thing to go would be the acrylic dome, and he figured that would happen at 800 feet or thereabouts. Which is exactly what happened. After the factory was built in Maine and he started on K-350s, he bought some 5' hemispheres and planned to build his own tank test facility for the shop. This was never completed. Almost every sub was drop tested in a 500 foot hole off the mouth of the Weskeag River. A couple of them were built for operatibns to 500 feet, and were tested in deeper water out in Penobscot Bay. The K-600 was built to Lloyd's spec had to be tank tested with an inspector present. So, back to Annapolis. I think they tested it to 750 feet per Lloyd's instructions for certification to 600 feet. Later on, George reacquired the K600 and was on board with some other guys to buy a boat and take the whole package to Columbia for a treasure hunt in 900 feet of water. He was confident the 600 would do that handily. They actually bought the old Coast Guard coastal tug the 'Snohomish', but the Colombians ended up saying sure, you can dive for treasure, but whatever you find belongs to the Colombian people, and you have to give it all to us. Which pretty much killed the profit margin on that particular pipe dream. If that hadn't happened, the K600 would have become a K900. Or so the story goes. Then George and I collaborated on the design for a K1000. I've got the initial prints, but that one was never built, either. Too bad.
Vance

-----Original Message-----
From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Wed, Jun 17, 2020 1:25 pm
Subject: Re: [PSUBS-MAILIST] publicity

Jon
OK sounds good. I was asking for the crush depth of a K-350 and the unmanned test depth for one hour is 600' so that doesn't sound correct. Someone told me a while ago that Ketteredge had put a 350 when first developed in a hyperbaric chamber that was only rated for 1,200 and pushed it down to that depth to see if it could take that pressure without imploding and nothing happened so he knew that that design would survive at least to that depth without failure. Can't remember who told me that but does anyone know if that story is correct?
Rick
On Wed, Jun 17, 2020 at 4:13 AM Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Just point them to the website Rick, if they ask.  There's a link to facebook from there.
I get 665 feet for the pressure cylinder and 576 feet for the hull caps, but those are theoretical best case limits.  So 500-600 feet would be a fair statement.  Given all the fabrication variables there is no way to predict a specific depth which is why we use safety margins.

    On Tuesday, June 16, 2020, 11:18:12 PM EDT, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 OK, I kind of got the impression over the years that people wanted to reach out and make more aware of the group but I didn't want to assume that until I got permission. Like I said, they will undoubtedly ask about the sub but not sure what their questions will be and hope they don't ask me stuff I don't know and look like an idiot, which won't be the first time! I'll let the group know when it will be on at what time zone when I find out. Jon, I don't have facebook but I hear you guys set it up and converse on it. Should I just say "Psubs.org" and then maybe mention that construction pictures can be seen there of peoples projects?? I doubt they will know enough to ask but if they ask me what the crush depth is, I don't have a clew! Does anybody else know? It's a K-350.Rick
On Tue, Jun 16, 2020 at 3:39 PM Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Of course.  Try to find out the date it will air so we can all watch.
Jon

    On Tuesday, June 16, 2020, 08:48:21 PM EDT, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 Hi guy's
I was contacted a while ago regarding an ad that I had on Craig's list to sell a couple of Russian and  Korean hardhats but that she said she was in New York and the ad was only for the Big Island. I at first thought that this was some sort of scam as there is so much of that going around but she said she was working for a production company that was similar to the Antique roadshow and hosted by the Comedian Jeff Foxworthy and wondered if I wanted to be involved. She said that it was not to sell the pieces but to have them appraised by someone and told what they were worth. It's going to be on the A&E channel. Anyway, it's legit and I will be filmed Via Skype with Foxworthy and the appraiser on 6-26-20. The sub was mentioned and they really want that in the background so I have no Idea what they are going to ask me but if they ask questions about the sub and they probably will, is it OK to mention Pubs? If you are interested, I will let you know what date and time it will be aired.I didn't want to say anything about the group before asking.Thanks
Rick
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